view sat_frontends/jp/cmd_pubsub.py @ 2886:b06cb71079fa

core (xmpp): new networkEnabled() and networkDisabled() methods: those methods can be called by platform specific plugins when network is known to be (un)available. This way, connection attempts can be cancelled when no network is available, saving resources (notably battery on mobile devices), or attempts can be restarted immediately when network is known to be available again.
author Goffi <goffi@goffi.org>
date Sat, 06 Apr 2019 19:05:57 +0200
parents dfba1301e61c
children b2f323237fce
line wrap: on
line source

#!/usr/bin/env python2
# -*- coding: utf-8 -*-

# jp: a SàT command line tool
# Copyright (C) 2009-2019 Jérôme Poisson (goffi@goffi.org)

# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU Affero General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.

# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU Affero General Public License for more details.

# You should have received a copy of the GNU Affero General Public License
# along with this program.  If not, see <http://www.gnu.org/licenses/>.


import base
from sat.core.i18n import _
from sat.core import exceptions
from sat_frontends.jp.constants import Const as C
from sat_frontends.jp import common
from sat_frontends.jp import arg_tools
from sat_frontends.jp import xml_tools
from functools import partial
from sat.tools.common import uri
from sat.tools.common.ansi import ANSI as A
from sat_frontends.tools import jid, strings
import argparse
import os.path
import re
import subprocess
import sys

__commands__ = ["Pubsub"]

PUBSUB_TMP_DIR = u"pubsub"
PUBSUB_SCHEMA_TMP_DIR = PUBSUB_TMP_DIR + "_schema"
ALLOWED_SUBSCRIPTIONS_OWNER = ("subscribed", "pending", "none")

# TODO: need to split this class in several modules, plugin should handle subcommands


class NodeInfo(base.CommandBase):
    def __init__(self, host):
        base.CommandBase.__init__(
            self,
            host,
            "info",
            use_output=C.OUTPUT_DICT,
            use_pubsub=True,
            pubsub_flags={C.NODE},
            help=_(u"retrieve node configuration"),
        )
        self.need_loop = True

    def add_parser_options(self):
        self.parser.add_argument(
            "-k",
            "--key",
            type=base.unicode_decoder,
            action="append",
            dest="keys",
            help=_(u"data key to filter"),
        )

    def removePrefix(self, key):
        return key[7:] if key.startswith(u"pubsub#") else key

    def filterKey(self, key):
        return any((key == k or key == u"pubsub#" + k) for k in self.args.keys)

    def psNodeConfigurationGetCb(self, config_dict):
        key_filter = (lambda k: True) if not self.args.keys else self.filterKey
        config_dict = {
            self.removePrefix(k): v for k, v in config_dict.iteritems() if key_filter(k)
        }
        self.output(config_dict)
        self.host.quit()

    def psNodeConfigurationGetEb(self, failure_):
        self.disp(
            u"can't get node configuration: {reason}".format(reason=failure_), error=True
        )
        self.host.quit(C.EXIT_BRIDGE_ERRBACK)

    def start(self):
        self.host.bridge.psNodeConfigurationGet(
            self.args.service,
            self.args.node,
            self.profile,
            callback=self.psNodeConfigurationGetCb,
            errback=self.psNodeConfigurationGetEb,
        )


class NodeCreate(base.CommandBase):
    def __init__(self, host):
        base.CommandBase.__init__(
            self,
            host,
            "create",
            use_output=C.OUTPUT_DICT,
            use_pubsub=True,
            pubsub_flags={C.NODE},
            use_verbose=True,
            help=_(u"create a node"),
        )
        self.need_loop = True

    def add_parser_options(self):
        self.parser.add_argument(
            "-f",
            "--field",
            type=base.unicode_decoder,
            action="append",
            nargs=2,
            dest="fields",
            default=[],
            metavar=(u"KEY", u"VALUE"),
            help=_(u"configuration field to set"),
        )
        self.parser.add_argument(
            "-F",
            "--full-prefix",
            action="store_true",
            help=_(u'don\'t prepend "pubsub#" prefix to field names'),
        )

    def psNodeCreateCb(self, node_id):
        if self.host.verbosity:
            announce = _(u"node created successfully: ")
        else:
            announce = u""
        self.disp(announce + node_id)
        self.host.quit()

    def psNodeCreateEb(self, failure_):
        self.disp(u"can't create: {reason}".format(reason=failure_), error=True)
        self.host.quit(C.EXIT_BRIDGE_ERRBACK)

    def start(self):
        if not self.args.full_prefix:
            options = {u"pubsub#" + k: v for k, v in self.args.fields}
        else:
            options = dict(self.args.fields)
        self.host.bridge.psNodeCreate(
            self.args.service,
            self.args.node,
            options,
            self.profile,
            callback=self.psNodeCreateCb,
            errback=partial(
                self.errback,
                msg=_(u"can't create node: {}"),
                exit_code=C.EXIT_BRIDGE_ERRBACK,
            ),
        )


class NodePurge(base.CommandBase):

    def __init__(self, host):
        super(NodePurge, self).__init__(
            host,
            "purge",
            use_pubsub=True,
            pubsub_flags={C.NODE},
            help=_(u"purge a node (i.e. remove all items from it)"),
        )
        self.need_loop = True

    def add_parser_options(self):
        self.parser.add_argument(
            "-f",
            "--force",
            action="store_true",
            help=_(u"purge node without confirmation"),
        )

    def psNodePurgeCb(self):
        self.disp(_(u"node [{node}] purged successfully").format(node=self.args.node))
        self.host.quit()

    def start(self):
        if not self.args.force:
            if not self.args.service:
                message = _(u"Are you sure to purge PEP node [{node_id}]? "
                            u"This will delete ALL items from it!").format(
                    node_id=self.args.node
                )
            else:
                message = _(
                    u"Are you sure to delete node [{node_id}] on service [{service}]? "
                    u"This will delete ALL items from it!"
                ).format(node_id=self.args.node, service=self.args.service)
            self.host.confirmOrQuit(message, _(u"node purge cancelled"))

        self.host.bridge.psNodePurge(
            self.args.service,
            self.args.node,
            self.profile,
            callback=self.psNodePurgeCb,
            errback=partial(
                self.errback,
                msg=_(u"can't purge node: {}"),
                exit_code=C.EXIT_BRIDGE_ERRBACK,
            ),
        )


class NodeDelete(base.CommandBase):
    def __init__(self, host):
        base.CommandBase.__init__(
            self,
            host,
            "delete",
            use_pubsub=True,
            pubsub_flags={C.NODE},
            help=_(u"delete a node"),
        )
        self.need_loop = True

    def add_parser_options(self):
        self.parser.add_argument(
            "-f",
            "--force",
            action="store_true",
            help=_(u"delete node without confirmation"),
        )

    def psNodeDeleteCb(self):
        self.disp(_(u"node [{node}] deleted successfully").format(node=self.args.node))
        self.host.quit()

    def start(self):
        if not self.args.force:
            if not self.args.service:
                message = _(u"Are you sure to delete PEP node [{node_id}] ?").format(
                    node_id=self.args.node
                )
            else:
                message = _(
                    u"Are you sure to delete node [{node_id}] on service [{service}] ?"
                ).format(node_id=self.args.node, service=self.args.service)
            self.host.confirmOrQuit(message, _(u"node deletion cancelled"))

        self.host.bridge.psNodeDelete(
            self.args.service,
            self.args.node,
            self.profile,
            callback=self.psNodeDeleteCb,
            errback=partial(
                self.errback,
                msg=_(u"can't delete node: {}"),
                exit_code=C.EXIT_BRIDGE_ERRBACK,
            ),
        )


class NodeSet(base.CommandBase):
    def __init__(self, host):
        base.CommandBase.__init__(
            self,
            host,
            "set",
            use_output=C.OUTPUT_DICT,
            use_pubsub=True,
            pubsub_flags={C.NODE},
            use_verbose=True,
            help=_(u"set node configuration"),
        )
        self.need_loop = True

    def add_parser_options(self):
        self.parser.add_argument(
            "-f",
            "--field",
            type=base.unicode_decoder,
            action="append",
            nargs=2,
            dest="fields",
            required=True,
            metavar=(u"KEY", u"VALUE"),
            help=_(u"configuration field to set (required)"),
        )

    def psNodeConfigurationSetCb(self):
        self.disp(_(u"node configuration successful"), 1)
        self.host.quit()

    def psNodeConfigurationSetEb(self, failure_):
        self.disp(
            u"can't set node configuration: {reason}".format(reason=failure_), error=True
        )
        self.host.quit(C.EXIT_BRIDGE_ERRBACK)

    def getKeyName(self, k):
        if not k.startswith(u"pubsub#"):
            return u"pubsub#" + k
        else:
            return k

    def start(self):
        self.host.bridge.psNodeConfigurationSet(
            self.args.service,
            self.args.node,
            {self.getKeyName(k): v for k, v in self.args.fields},
            self.profile,
            callback=self.psNodeConfigurationSetCb,
            errback=self.psNodeConfigurationSetEb,
        )


class NodeImport(base.CommandBase):

    def __init__(self, host):
        super(NodeImport, self).__init__(
            host,
            "import",
            use_pubsub=True,
            pubsub_flags={C.NODE},
            help=_(u"import raw XML to a node"),
        )
        self.need_loop = True

    def add_parser_options(self):
        self.parser.add_argument(
            "--admin",
            action="store_true",
            help=_(u"do a pubsub admin request, needed to change publisher"),
        )
        self.parser.add_argument(
            "import_file",
            type=file,
            help=_(u"path to the XML file with data to import. The file must contain "
                   u"whole XML of each item to import."),
        )

    def psItemsSendCb(self, item_ids):
        self.disp(_(u'items published with id(s) {item_ids}').format(
            item_ids=u', '.join(item_ids)))
        self.host.quit()

    def start(self):
        try:
            element, etree = xml_tools.etreeParse(self, self.args.import_file,
                                                  reraise=True)
        except Exception as e:
            from lxml.etree import XMLSyntaxError
            if isinstance(e, XMLSyntaxError) and e.code == 5:
                # we have extra content, this probaby means that item are not wrapped
                # so we wrap them here and try again
                self.args.import_file.seek(0)
                xml_buf = "<import>" + self.args.import_file.read() + "</import>"
                element, etree = xml_tools.etreeParse(self, xml_buf)

        # we reverse element as we expect to have most recently published element first
        # TODO: make this more explicit and add an option
        element[:] = reversed(element)

        if not all([i.tag == '{http://jabber.org/protocol/pubsub}item' for i in element]):
            self.disp(
                _(u"You are not using list of pubsub items, we can't import this file"),
                error=True)
            self.host.quit(C.EXIT_DATA_ERROR)

        items = [etree.tostring(i, encoding="utf-8") for i in element]
        if self.args.admin:
            self.host.bridge.psAdminItemsSend(
                self.args.service,
                self.args.node,
                items,
                u"",
                self.profile,
                callback=partial(self.psItemsSendCb),
                errback=partial(
                    self.errback,
                    msg=_(u"can't send item: {}"),
                    exit_code=C.EXIT_BRIDGE_ERRBACK,
                ),
            )
        else:
            self.disp(_(u"Items are imported without using admin mode, publisher can't "
                        u"be changed"))
            self.host.bridge.psItemsSend(
                self.args.service,
                self.args.node,
                items,
                u"",
                self.profile,
                callback=partial(self.psItemsSendCb),
                errback=partial(
                    self.errback,
                    msg=_(u"can't send item: {}"),
                    exit_code=C.EXIT_BRIDGE_ERRBACK,
                ),
            )


class NodeAffiliationsGet(base.CommandBase):
    def __init__(self, host):
        base.CommandBase.__init__(
            self,
            host,
            "get",
            use_output=C.OUTPUT_DICT,
            use_pubsub=True,
            pubsub_flags={C.NODE},
            help=_(u"retrieve node affiliations (for node owner)"),
        )
        self.need_loop = True

    def add_parser_options(self):
        pass

    def psNodeAffiliationsGetCb(self, affiliations):
        self.output(affiliations)
        self.host.quit()

    def psNodeAffiliationsGetEb(self, failure_):
        self.disp(
            u"can't get node affiliations: {reason}".format(reason=failure_), error=True
        )
        self.host.quit(C.EXIT_BRIDGE_ERRBACK)

    def start(self):
        self.host.bridge.psNodeAffiliationsGet(
            self.args.service,
            self.args.node,
            self.profile,
            callback=self.psNodeAffiliationsGetCb,
            errback=self.psNodeAffiliationsGetEb,
        )


class NodeAffiliationsSet(base.CommandBase):
    def __init__(self, host):
        base.CommandBase.__init__(
            self,
            host,
            "set",
            use_pubsub=True,
            pubsub_flags={C.NODE},
            use_verbose=True,
            help=_(u"set affiliations (for node owner)"),
        )
        self.need_loop = True

    def add_parser_options(self):
        # XXX: we use optional argument syntax for a required one because list of list of 2 elements
        #      (uses to construct dicts) don't work with positional arguments
        self.parser.add_argument(
            "-a",
            "--affiliation",
            dest="affiliations",
            metavar=("JID", "AFFILIATION"),
            required=True,
            type=base.unicode_decoder,
            action="append",
            nargs=2,
            help=_(u"entity/affiliation couple(s)"),
        )

    def psNodeAffiliationsSetCb(self):
        self.disp(_(u"affiliations have been set"), 1)
        self.host.quit()

    def psNodeAffiliationsSetEb(self, failure_):
        self.disp(
            u"can't set node affiliations: {reason}".format(reason=failure_), error=True
        )
        self.host.quit(C.EXIT_BRIDGE_ERRBACK)

    def start(self):
        affiliations = dict(self.args.affiliations)
        self.host.bridge.psNodeAffiliationsSet(
            self.args.service,
            self.args.node,
            affiliations,
            self.profile,
            callback=self.psNodeAffiliationsSetCb,
            errback=self.psNodeAffiliationsSetEb,
        )


class NodeAffiliations(base.CommandBase):
    subcommands = (NodeAffiliationsGet, NodeAffiliationsSet)

    def __init__(self, host):
        super(NodeAffiliations, self).__init__(
            host,
            "affiliations",
            use_profile=False,
            help=_(u"set or retrieve node affiliations"),
        )


class NodeSubscriptionsGet(base.CommandBase):
    def __init__(self, host):
        base.CommandBase.__init__(
            self,
            host,
            "get",
            use_output=C.OUTPUT_DICT,
            use_pubsub=True,
            pubsub_flags={C.NODE},
            help=_(u"retrieve node subscriptions (for node owner)"),
        )
        self.need_loop = True

    def add_parser_options(self):
        pass

    def psNodeSubscriptionsGetCb(self, subscriptions):
        self.output(subscriptions)
        self.host.quit()

    def psNodeSubscriptionsGetEb(self, failure_):
        self.disp(
            u"can't get node subscriptions: {reason}".format(reason=failure_), error=True
        )
        self.host.quit(C.EXIT_BRIDGE_ERRBACK)

    def start(self):
        self.host.bridge.psNodeSubscriptionsGet(
            self.args.service,
            self.args.node,
            self.profile,
            callback=self.psNodeSubscriptionsGetCb,
            errback=self.psNodeSubscriptionsGetEb,
        )


class StoreSubscriptionAction(argparse.Action):
    """Action which handle subscription parameter for owner

    list is given by pairs: jid and subscription state
    if subscription state is not specified, it default to "subscribed"
    """

    def __call__(self, parser, namespace, values, option_string):
        dest_dict = getattr(namespace, self.dest)
        while values:
            jid_s = values.pop(0)
            try:
                subscription = values.pop(0)
            except IndexError:
                subscription = "subscribed"
            if subscription not in ALLOWED_SUBSCRIPTIONS_OWNER:
                parser.error(
                    _(u"subscription must be one of {}").format(
                        u", ".join(ALLOWED_SUBSCRIPTIONS_OWNER)
                    )
                )
            dest_dict[jid_s] = subscription


class NodeSubscriptionsSet(base.CommandBase):
    def __init__(self, host):
        base.CommandBase.__init__(
            self,
            host,
            "set",
            use_pubsub=True,
            pubsub_flags={C.NODE},
            use_verbose=True,
            help=_(u"set/modify subscriptions (for node owner)"),
        )
        self.need_loop = True

    def add_parser_options(self):
        # XXX: we use optional argument syntax for a required one because list of list of 2 elements
        #      (uses to construct dicts) don't work with positional arguments
        self.parser.add_argument(
            "-S",
            "--subscription",
            dest="subscriptions",
            default={},
            nargs="+",
            metavar=("JID [SUSBSCRIPTION]"),
            required=True,
            type=base.unicode_decoder,
            action=StoreSubscriptionAction,
            help=_(u"entity/subscription couple(s)"),
        )

    def psNodeSubscriptionsSetCb(self):
        self.disp(_(u"subscriptions have been set"), 1)
        self.host.quit()

    def psNodeSubscriptionsSetEb(self, failure_):
        self.disp(
            u"can't set node subscriptions: {reason}".format(reason=failure_), error=True
        )
        self.host.quit(C.EXIT_BRIDGE_ERRBACK)

    def start(self):
        self.host.bridge.psNodeSubscriptionsSet(
            self.args.service,
            self.args.node,
            self.args.subscriptions,
            self.profile,
            callback=self.psNodeSubscriptionsSetCb,
            errback=self.psNodeSubscriptionsSetEb,
        )


class NodeSubscriptions(base.CommandBase):
    subcommands = (NodeSubscriptionsGet, NodeSubscriptionsSet)

    def __init__(self, host):
        super(NodeSubscriptions, self).__init__(
            host,
            "subscriptions",
            use_profile=False,
            help=_(u"get or modify node subscriptions"),
        )


class NodeSchemaSet(base.CommandBase):
    def __init__(self, host):
        base.CommandBase.__init__(
            self,
            host,
            "set",
            use_pubsub=True,
            pubsub_flags={C.NODE},
            use_verbose=True,
            help=_(u"set/replace a schema"),
        )
        self.need_loop = True

    def add_parser_options(self):
        self.parser.add_argument("schema", help=_(u"schema to set (must be XML)"))

    def psSchemaSetCb(self):
        self.disp(_(u"schema has been set"), 1)
        self.host.quit()

    def start(self):
        self.host.bridge.psSchemaSet(
            self.args.service,
            self.args.node,
            self.args.schema,
            self.profile,
            callback=self.psSchemaSetCb,
            errback=partial(
                self.errback,
                msg=_(u"can't set schema: {}"),
                exit_code=C.EXIT_BRIDGE_ERRBACK,
            ),
        )


class NodeSchemaEdit(base.CommandBase, common.BaseEdit):
    use_items = False

    def __init__(self, host):
        base.CommandBase.__init__(
            self,
            host,
            "edit",
            use_pubsub=True,
            pubsub_flags={C.NODE},
            use_draft=True,
            use_verbose=True,
            help=_(u"edit a schema"),
        )
        common.BaseEdit.__init__(self, self.host, PUBSUB_SCHEMA_TMP_DIR)
        self.need_loop = True

    def add_parser_options(self):
        pass

    def psSchemaSetCb(self):
        self.disp(_(u"schema has been set"), 1)
        self.host.quit()

    def publish(self, schema):
        self.host.bridge.psSchemaSet(
            self.args.service,
            self.args.node,
            schema,
            self.profile,
            callback=self.psSchemaSetCb,
            errback=partial(
                self.errback,
                msg=_(u"can't set schema: {}"),
                exit_code=C.EXIT_BRIDGE_ERRBACK,
            ),
        )

    def psSchemaGetCb(self, schema):
        try:
            from lxml import etree
        except ImportError:
            self.disp(u'lxml module must be installed to use edit, please install it '
                      u'with "pip install lxml"',
                error=True,
            )
            self.host.quit(1)
        content_file_obj, content_file_path = self.getTmpFile()
        schema = schema.strip()
        if schema:
            parser = etree.XMLParser(remove_blank_text=True)
            schema_elt = etree.fromstring(schema, parser)
            content_file_obj.write(
                etree.tostring(schema_elt, encoding="utf-8", pretty_print=True)
            )
            content_file_obj.seek(0)
        self.runEditor("pubsub_schema_editor_args", content_file_path, content_file_obj)

    def start(self):
        self.host.bridge.psSchemaGet(
            self.args.service,
            self.args.node,
            self.profile,
            callback=self.psSchemaGetCb,
            errback=partial(
                self.errback,
                msg=_(u"can't edit schema: {}"),
                exit_code=C.EXIT_BRIDGE_ERRBACK,
            ),
        )


class NodeSchemaGet(base.CommandBase):
    def __init__(self, host):
        base.CommandBase.__init__(
            self,
            host,
            "get",
            use_output=C.OUTPUT_XML,
            use_pubsub=True,
            pubsub_flags={C.NODE},
            use_verbose=True,
            help=_(u"get schema"),
        )
        self.need_loop = True

    def add_parser_options(self):
        pass

    def psSchemaGetCb(self, schema):
        if not schema:
            self.disp(_(u"no schema found"), 1)
            self.host.quit(1)
        self.output(schema)
        self.host.quit()

    def start(self):
        self.host.bridge.psSchemaGet(
            self.args.service,
            self.args.node,
            self.profile,
            callback=self.psSchemaGetCb,
            errback=partial(
                self.errback,
                msg=_(u"can't get schema: {}"),
                exit_code=C.EXIT_BRIDGE_ERRBACK,
            ),
        )


class NodeSchema(base.CommandBase):
    subcommands = (NodeSchemaSet, NodeSchemaEdit, NodeSchemaGet)

    def __init__(self, host):
        super(NodeSchema, self).__init__(
            host, "schema", use_profile=False, help=_(u"data schema manipulation")
        )


class Node(base.CommandBase):
    subcommands = (
        NodeInfo,
        NodeCreate,
        NodePurge,
        NodeDelete,
        NodeSet,
        NodeImport,
        NodeAffiliations,
        NodeSubscriptions,
        NodeSchema,
    )

    def __init__(self, host):
        super(Node, self).__init__(
            host, "node", use_profile=False, help=_("node handling")
        )


class Set(base.CommandBase):
    def __init__(self, host):
        base.CommandBase.__init__(
            self,
            host,
            "set",
            use_pubsub=True,
            pubsub_flags={C.NODE},
            help=_(u"publish a new item or update an existing one"),
        )
        self.need_loop = True

    def add_parser_options(self):
        self.parser.add_argument(
            "item",
            type=base.unicode_decoder,
            nargs="?",
            default=u"",
            help=_(u"id, URL of the item to update, keyword, or nothing for new item"),
        )

    def psItemsSendCb(self, published_id):
        if published_id:
            self.disp(u"Item published at {pub_id}".format(pub_id=published_id))
        else:
            self.disp(u"Item published")
        self.host.quit(C.EXIT_OK)

    def start(self):
        element, etree = xml_tools.etreeParse(self, sys.stdin)
        element = xml_tools.getPayload(self, element)
        payload = etree.tostring(element, encoding="unicode")

        self.host.bridge.psItemSend(
            self.args.service,
            self.args.node,
            payload,
            self.args.item,
            {},
            self.profile,
            callback=self.psItemsSendCb,
            errback=partial(
                self.errback,
                msg=_(u"can't send item: {}"),
                exit_code=C.EXIT_BRIDGE_ERRBACK,
            ),
        )


class Get(base.CommandBase):
    def __init__(self, host):
        base.CommandBase.__init__(
            self,
            host,
            "get",
            use_output=C.OUTPUT_LIST_XML,
            use_pubsub=True,
            pubsub_flags={C.NODE, C.MULTI_ITEMS},
            help=_(u"get pubsub item(s)"),
        )
        self.need_loop = True

    def add_parser_options(self):
        self.parser.add_argument(
            "-S",
            "--sub-id",
            type=base.unicode_decoder,
            default=u"",
            help=_(u"subscription id"),
        )
        #  TODO: a key(s) argument to select keys to display
        # TODO: add MAM filters

    def psItemsGetCb(self, ps_result):
        self.output(ps_result[0])
        self.host.quit(C.EXIT_OK)

    def psItemsGetEb(self, failure_):
        self.disp(u"can't get pubsub items: {reason}".format(reason=failure_), error=True)
        self.host.quit(C.EXIT_BRIDGE_ERRBACK)

    def start(self):
        self.host.bridge.psItemsGet(
            self.args.service,
            self.args.node,
            self.args.max,
            self.args.items,
            self.args.sub_id,
            self.getPubsubExtra(),
            self.profile,
            callback=self.psItemsGetCb,
            errback=self.psItemsGetEb,
        )


class Delete(base.CommandBase):
    def __init__(self, host):
        base.CommandBase.__init__(
            self,
            host,
            "delete",
            use_pubsub=True,
            pubsub_flags={C.NODE, C.SINGLE_ITEM},
            help=_(u"delete an item"),
        )
        self.need_loop = True

    def add_parser_options(self):
        self.parser.add_argument(
            "-f", "--force", action="store_true", help=_(u"delete without confirmation")
        )
        self.parser.add_argument(
            "-N", "--notify", action="store_true", help=_(u"notify deletion")
        )

    def psItemsDeleteCb(self):
        self.disp(_(u"item {item_id} has been deleted").format(item_id=self.args.item))
        self.host.quit(C.EXIT_OK)

    def start(self):
        if not self.args.item:
            self.parser.error(_(u"You need to specify an item to delete"))
        if not self.args.force:
            message = _(u"Are you sure to delete item {item_id} ?").format(
                item_id=self.args.item
            )
            self.host.confirmOrQuit(message, _(u"item deletion cancelled"))
        self.host.bridge.psRetractItem(
            self.args.service,
            self.args.node,
            self.args.item,
            self.args.notify,
            self.profile,
            callback=self.psItemsDeleteCb,
            errback=partial(
                self.errback,
                msg=_(u"can't delete item: {}"),
                exit_code=C.EXIT_BRIDGE_ERRBACK,
            ),
        )


class Edit(base.CommandBase, common.BaseEdit):
    def __init__(self, host):
        base.CommandBase.__init__(
            self,
            host,
            "edit",
            use_verbose=True,
            use_pubsub=True,
            pubsub_flags={C.NODE, C.SINGLE_ITEM},
            use_draft=True,
            help=_(u"edit an existing or new pubsub item"),
        )
        common.BaseEdit.__init__(self, self.host, PUBSUB_TMP_DIR)

    def add_parser_options(self):
        pass

    def edit(self, content_file_path, content_file_obj):
        # we launch editor
        self.runEditor("pubsub_editor_args", content_file_path, content_file_obj)

    def publish(self, content):
        published_id = self.host.bridge.psItemSend(
            self.pubsub_service,
            self.pubsub_node,
            content,
            self.pubsub_item or "",
            {},
            self.profile,
        )
        if published_id:
            self.disp(u"Item published at {pub_id}".format(pub_id=published_id))
        else:
            self.disp(u"Item published")

    def getItemData(self, service, node, item):
        try:
            from lxml import etree
        except ImportError:
            self.disp(u'lxml module must be installed to use edit, please install it '
                      u'with "pip install lxml"',
                error=True,
            )
            self.host.quit(1)
        items = [item] if item is not None else []
        item_raw = self.host.bridge.psItemsGet(
            service, node, 1, items, "", {}, self.profile
        )[0][0]
        parser = etree.XMLParser(remove_blank_text=True)
        item_elt = etree.fromstring(item_raw, parser)
        item_id = item_elt.get("id")
        try:
            payload = item_elt[0]
        except IndexError:
            self.disp(_(u"Item has not payload"), 1)
            return u""
        return etree.tostring(payload, encoding="unicode", pretty_print=True), item_id

    def start(self):
        self.pubsub_service, self.pubsub_node, self.pubsub_item, content_file_path, content_file_obj = (
            self.getItemPath()
        )
        self.edit(content_file_path, content_file_obj)


class Subscribe(base.CommandBase):
    def __init__(self, host):
        base.CommandBase.__init__(
            self,
            host,
            "subscribe",
            use_pubsub=True,
            pubsub_flags={C.NODE},
            use_verbose=True,
            help=_(u"subscribe to a node"),
        )
        self.need_loop = True

    def add_parser_options(self):
        pass

    def psSubscribeCb(self, sub_id):
        self.disp(_(u"subscription done"), 1)
        if sub_id:
            self.disp(_(u"subscription id: {sub_id}").format(sub_id=sub_id))
        self.host.quit()

    def start(self):
        self.host.bridge.psSubscribe(
            self.args.service,
            self.args.node,
            {},
            self.profile,
            callback=self.psSubscribeCb,
            errback=partial(
                self.errback,
                msg=_(u"can't subscribe to node: {}"),
                exit_code=C.EXIT_BRIDGE_ERRBACK,
            ),
        )


class Unsubscribe(base.CommandBase):
    # TODO: voir pourquoi NodeNotFound sur subscribe juste après unsubscribe

    def __init__(self, host):
        base.CommandBase.__init__(
            self,
            host,
            "unsubscribe",
            use_pubsub=True,
            pubsub_flags={C.NODE},
            use_verbose=True,
            help=_(u"unsubscribe from a node"),
        )
        self.need_loop = True

    def add_parser_options(self):
        pass

    def psUnsubscribeCb(self):
        self.disp(_(u"subscription removed"), 1)
        self.host.quit()

    def start(self):
        self.host.bridge.psUnsubscribe(
            self.args.service,
            self.args.node,
            self.profile,
            callback=self.psUnsubscribeCb,
            errback=partial(
                self.errback,
                msg=_(u"can't unsubscribe from node: {}"),
                exit_code=C.EXIT_BRIDGE_ERRBACK,
            ),
        )


class Subscriptions(base.CommandBase):
    def __init__(self, host):
        base.CommandBase.__init__(
            self,
            host,
            "subscriptions",
            use_output=C.OUTPUT_LIST_DICT,
            use_pubsub=True,
            help=_(u"retrieve all subscriptions on a service"),
        )
        self.need_loop = True

    def add_parser_options(self):
        pass

    def psSubscriptionsGetCb(self, subscriptions):
        self.output(subscriptions)
        self.host.quit()

    def start(self):
        self.host.bridge.psSubscriptionsGet(
            self.args.service,
            self.args.node,
            self.profile,
            callback=self.psSubscriptionsGetCb,
            errback=partial(
                self.errback,
                msg=_(u"can't retrieve subscriptions: {}"),
                exit_code=C.EXIT_BRIDGE_ERRBACK,
            ),
        )


class Affiliations(base.CommandBase):
    def __init__(self, host):
        base.CommandBase.__init__(
            self,
            host,
            "affiliations",
            use_output=C.OUTPUT_DICT,
            use_pubsub=True,
            help=_(u"retrieve all affiliations on a service"),
        )
        self.need_loop = True

    def add_parser_options(self):
        pass

    def psAffiliationsGetCb(self, affiliations):
        self.output(affiliations)
        self.host.quit()

    def psAffiliationsGetEb(self, failure_):
        self.disp(
            u"can't get node affiliations: {reason}".format(reason=failure_), error=True
        )
        self.host.quit(C.EXIT_BRIDGE_ERRBACK)

    def start(self):
        self.host.bridge.psAffiliationsGet(
            self.args.service,
            self.args.node,
            self.profile,
            callback=self.psAffiliationsGetCb,
            errback=self.psAffiliationsGetEb,
        )


class Search(base.CommandBase):
    """this command do a search without using MAM

    This commands checks every items it finds by itself,
    so it may be heavy in resources both for server and client
    """

    RE_FLAGS = re.MULTILINE | re.UNICODE
    EXEC_ACTIONS = (u"exec", u"external")

    def __init__(self, host):
        # FIXME: C.NO_MAX is not needed here, and this can be globally removed from consts
        #        the only interest is to change the help string, but this can be explained
        #        extensively in man pages (max is for each node found)
        base.CommandBase.__init__(
            self,
            host,
            "search",
            use_output=C.OUTPUT_XML,
            use_pubsub=True,
            pubsub_flags={C.MULTI_ITEMS, C.NO_MAX},
            use_verbose=True,
            help=_(u"search items corresponding to filters"),
        )
        self.need_loop = True

    @property
    def etree(self):
        """load lxml.etree only if needed"""
        if self._etree is None:
            from lxml import etree

            self._etree = etree
        return self._etree

    def filter_opt(self, value, type_):
        value = base.unicode_decoder(value)
        return (type_, value)

    def filter_flag(self, value, type_):
        value = C.bool(value)
        return (type_, value)

    def add_parser_options(self):
        self.parser.add_argument(
            "-D",
            "--max-depth",
            type=int,
            default=0,
            help=_(u"maximum depth of recursion (will search linked nodes if > 0, "
                   u"DEFAULT: 0)"),
        )
        self.parser.add_argument(
            "-M",
            "--node-max",
            type=int,
            default=30,
            help=_(u"maximum number of items to get per node ({} to get all items, "
                   u"DEFAULT: 30)".format( C.NO_LIMIT)),
        )
        self.parser.add_argument(
            "-N",
            "--namespace",
            action="append",
            nargs=2,
            default=[],
            metavar="NAME NAMESPACE",
            help=_(u"namespace to use for xpath"),
        )

        # filters
        filter_text = partial(self.filter_opt, type_=u"text")
        filter_re = partial(self.filter_opt, type_=u"regex")
        filter_xpath = partial(self.filter_opt, type_=u"xpath")
        filter_python = partial(self.filter_opt, type_=u"python")
        filters = self.parser.add_argument_group(
            _(u"filters"),
            _(u"only items corresponding to following filters will be kept"),
        )
        filters.add_argument(
            "-t",
            "--text",
            action="append",
            dest="filters",
            type=filter_text,
            metavar="TEXT",
            help=_(u"full text filter, item must contain this string (XML included)"),
        )
        filters.add_argument(
            "-r",
            "--regex",
            action="append",
            dest="filters",
            type=filter_re,
            metavar="EXPRESSION",
            help=_(u"like --text but using a regular expression"),
        )
        filters.add_argument(
            "-x",
            "--xpath",
            action="append",
            dest="filters",
            type=filter_xpath,
            metavar="XPATH",
            help=_(u"filter items which has elements matching this xpath"),
        )
        filters.add_argument(
            "-P",
            "--python",
            action="append",
            dest="filters",
            type=filter_python,
            metavar="PYTHON_CODE",
            help=_(u'Python expression which much return a bool (True to keep item, '
                   u'False to reject it). "item" is raw text item, "item_xml" is '
                   u'lxml\'s etree.Element'
            ),
        )

        # filters flags
        flag_case = partial(self.filter_flag, type_=u"ignore-case")
        flag_invert = partial(self.filter_flag, type_=u"invert")
        flag_dotall = partial(self.filter_flag, type_=u"dotall")
        flag_matching = partial(self.filter_flag, type_=u"only-matching")
        flags = self.parser.add_argument_group(
            _(u"filters flags"),
            _(u"filters modifiers (change behaviour of following filters)"),
        )
        flags.add_argument(
            "-C",
            "--ignore-case",
            action="append",
            dest="filters",
            type=flag_case,
            const=("ignore-case", True),
            nargs="?",
            metavar="BOOLEAN",
            help=_(u"(don't) ignore case in following filters (DEFAULT: case sensitive)"),
        )
        flags.add_argument(
            "-I",
            "--invert",
            action="append",
            dest="filters",
            type=flag_invert,
            const=("invert", True),
            nargs="?",
            metavar="BOOLEAN",
            help=_(u"(don't) invert effect of following filters (DEFAULT: don't invert)"),
        )
        flags.add_argument(
            "-A",
            "--dot-all",
            action="append",
            dest="filters",
            type=flag_dotall,
            const=("dotall", True),
            nargs="?",
            metavar="BOOLEAN",
            help=_(u"(don't) use DOTALL option for regex (DEFAULT: don't use)"),
        )
        flags.add_argument(
            "-k",
            "--only-matching",
            action="append",
            dest="filters",
            type=flag_matching,
            const=("only-matching", True),
            nargs="?",
            metavar="BOOLEAN",
            help=_(u"keep only the matching part of the item"),
        )

        # action
        self.parser.add_argument(
            "action",
            default="print",
            nargs="?",
            choices=("print", "exec", "external"),
            help=_(u"action to do on found items (DEFAULT: print)"),
        )
        self.parser.add_argument("command", nargs=argparse.REMAINDER)

    def psItemsGetEb(self, failure_, service, node):
        self.disp(
            u"can't get pubsub items at {service} (node: {node}): {reason}".format(
                service=service, node=node, reason=failure_
            ),
            error=True,
        )
        self.to_get -= 1

    def getItems(self, depth, service, node, items):
        search = partial(self.search, depth=depth)
        errback = partial(self.psItemsGetEb, service=service, node=node)
        self.host.bridge.psItemsGet(
            service,
            node,
            self.args.node_max,
            items,
            "",
            self.getPubsubExtra(),
            self.profile,
            callback=search,
            errback=errback,
        )
        self.to_get += 1

    def _checkPubsubURL(self, match, found_nodes):
        """check that the matched URL is an xmpp: one

        @param found_nodes(list[unicode]): found_nodes
            this list will be filled while xmpp: URIs are discovered
        """
        url = match.group(0)
        if url.startswith(u"xmpp"):
            try:
                url_data = uri.parseXMPPUri(url)
            except ValueError:
                return
            if url_data[u"type"] == u"pubsub":
                found_node = {u"service": url_data[u"path"], u"node": url_data[u"node"]}
                if u"item" in url_data:
                    found_node[u"item"] = url_data[u"item"]
                found_nodes.append(found_node)

    def getSubNodes(self, item, depth):
        """look for pubsub URIs in item, and getItems on the linked nodes"""
        found_nodes = []
        checkURI = partial(self._checkPubsubURL, found_nodes=found_nodes)
        strings.RE_URL.sub(checkURI, item)
        for data in found_nodes:
            self.getItems(
                depth + 1,
                data[u"service"],
                data[u"node"],
                [data[u"item"]] if u"item" in data else [],
            )

    def parseXml(self, item):
        try:
            return self.etree.fromstring(item)
        except self.etree.XMLSyntaxError:
            self.disp(
                _(u"item doesn't looks like XML, you have probably used --only-matching "
                  u"somewhere before and we have no more XML"),
                error=True,
            )
            self.host.quit(C.EXIT_BAD_ARG)

    def filter(self, item):
        """apply filters given on command line

        if only-matching is used, item may be modified
        @return (tuple[bool, unicode]): a tuple with:
            - keep: True if item passed the filters
            - item: it is returned in case of modifications
        """
        ignore_case = False
        invert = False
        dotall = False
        only_matching = False
        item_xml = None
        for type_, value in self.args.filters:
            keep = True

            ## filters

            if type_ == u"text":
                if ignore_case:
                    if value.lower() not in item.lower():
                        keep = False
                else:
                    if value not in item:
                        keep = False
                if keep and only_matching:
                    # doesn't really make sens to keep a fixed string
                    # so we raise an error
                    self.host.disp(
                        _(
                            u"--only-matching used with fixed --text string, are you sure?"
                        ),
                        error=True,
                    )
                    self.host.quit(C.EXIT_BAD_ARG)
            elif type_ == u"regex":
                flags = self.RE_FLAGS
                if ignore_case:
                    flags |= re.IGNORECASE
                if dotall:
                    flags |= re.DOTALL
                match = re.search(value, item, flags)
                keep = match != None
                if keep and only_matching:
                    item = match.group()
                    item_xml = None
            elif type_ == u"xpath":
                if item_xml is None:
                    item_xml = self.parseXml(item)
                try:
                    elts = item_xml.xpath(value, namespaces=self.args.namespace)
                except self.etree.XPathEvalError as e:
                    self.disp(
                        _(u"can't use xpath: {reason}").format(reason=e), error=True
                    )
                    self.host.quit(C.EXIT_BAD_ARG)
                keep = bool(elts)
                if keep and only_matching:
                    item_xml = elts[0]
                    try:
                        item = self.etree.tostring(item_xml, encoding="unicode")
                    except TypeError:
                        # we have a string only, not an element
                        item = unicode(item_xml)
                        item_xml = None
            elif type_ == u"python":
                if item_xml is None:
                    item_xml = self.parseXml(item)
                cmd_ns = {u"item": item, u"item_xml": item_xml}
                try:
                    keep = eval(value, cmd_ns)
                except SyntaxError as e:
                    self.disp(unicode(e), error=True)
                    self.host.quit(C.EXIT_BAD_ARG)

            ## flags

            elif type_ == u"ignore-case":
                ignore_case = value
            elif type_ == u"invert":
                invert = value
                #  we need to continue, else loop would end here
                continue
            elif type_ == u"dotall":
                dotall = value
            elif type_ == u"only-matching":
                only_matching = value
            else:
                raise exceptions.InternalError(
                    _(u"unknown filter type {type}").format(type=type_)
                )

            if invert:
                keep = not keep
            if not keep:
                return False, item

        return True, item

    def doItemAction(self, item, metadata):
        """called when item has been kepts and the action need to be done

        @param item(unicode): accepted item
        """
        action = self.args.action
        if action == u"print" or self.host.verbosity > 0:
            try:
                self.output(item)
            except self.etree.XMLSyntaxError:
                # item is not valid XML, but a string
                # can happen when --only-matching is used
                self.disp(item)
        if action in self.EXEC_ACTIONS:
            item_elt = self.parseXml(item)
            if action == u"exec":
                use = {
                    "service": metadata[u"service"],
                    "node": metadata[u"node"],
                    "item": item_elt.get("id"),
                    "profile": self.profile,
                }
                # we need to send a copy of self.args.command
                # else it would be modified
                parser_args, use_args = arg_tools.get_use_args(
                    self.host, self.args.command, use, verbose=self.host.verbosity > 1
                )
                cmd_args = sys.argv[0:1] + parser_args + use_args
            else:
                cmd_args = self.args.command

            self.disp(
                u"COMMAND: {command}".format(
                    command=u" ".join([arg_tools.escape(a) for a in cmd_args])
                ),
                2,
            )
            if action == u"exec":
                ret = subprocess.call(cmd_args)
            else:
                p = subprocess.Popen(cmd_args, stdin=subprocess.PIPE)
                p.communicate(item.encode("utf-8"))
                ret = p.wait()
            if ret != 0:
                self.disp(
                    A.color(
                        C.A_FAILURE,
                        _(u"executed command failed with exit code {code}").format(
                            code=ret
                        ),
                    )
                )

    def search(self, items_data, depth):
        """callback of getItems

        this method filters items, get sub nodes if needed,
        do the requested action, and exit the command when everything is done
        @param items_data(tuple): result of getItems
        @param depth(int): current depth level
            0 for first node, 1 for first children, and so on
        """
        items, metadata = items_data
        for item in items:
            if depth < self.args.max_depth:
                self.getSubNodes(item, depth)
            keep, item = self.filter(item)
            if not keep:
                continue
            self.doItemAction(item, metadata)

        #  we check if we got all getItems results
        self.to_get -= 1
        if self.to_get == 0:
            # yes, we can quit
            self.host.quit()
        assert self.to_get > 0

    def start(self):
        if self.args.command:
            if self.args.action not in self.EXEC_ACTIONS:
                self.parser.error(
                    _(u"Command can only be used with {actions} actions").format(
                        actions=u", ".join(self.EXEC_ACTIONS)
                    )
                )
        else:
            if self.args.action in self.EXEC_ACTIONS:
                self.parser.error(_(u"you need to specify a command to execute"))
        if not self.args.node:
            # TODO: handle get service affiliations when node is not set
            self.parser.error(_(u"empty node is not handled yet"))
        # to_get is increased on each get and decreased on each answer
        # when it reach 0 again, the command is finished
        self.to_get = 0
        self._etree = None
        if self.args.filters is None:
            self.args.filters = []
        self.args.namespace = dict(
            self.args.namespace + [("pubsub", "http://jabber.org/protocol/pubsub")]
        )
        self.getItems(0, self.args.service, self.args.node, self.args.items)


class Transform(base.CommandBase):
    def __init__(self, host):
        base.CommandBase.__init__(
            self,
            host,
            "transform",
            use_pubsub=True,
            pubsub_flags={C.NODE, C.MULTI_ITEMS},
            help=_(u"modify items of a node using an external command/script"),
        )
        self.need_loop = True

    def add_parser_options(self):
        self.parser.add_argument(
            "--apply",
            action="store_true",
            help=_(u"apply transformation (DEFAULT: do a dry run)"),
        )
        self.parser.add_argument(
            "--admin",
            action="store_true",
            help=_(u"do a pubsub admin request, needed to change publisher"),
        )
        self.parser.add_argument(
            "-I",
            "--ignore_errors",
            action="store_true",
            help=_(
                u"if command return a non zero exit code, ignore the item and continue"),
        )
        self.parser.add_argument(
            "-A",
            "--all",
            action="store_true",
            help=_(u"get all items by looping over all pages using RSM")
        )
        self.parser.add_argument(
            "command_path",
            help=_(u"path to the command to use. Will be called repetitivly with an "
                   u"item as input. Output (full item XML) will be used as new one. "
                   u'Return "DELETE" string to delete the item, and "SKIP" to ignore it'),
        )

    def psItemsSendCb(self, item_ids, metadata):
        if item_ids:
            self.disp(_(u'items published with ids {item_ids}').format(
                item_ids=u', '.join(item_ids)))
        else:
            self.disp(_(u'items published'))
        if self.args.all:
            return self.handleNextPage(metadata)
        else:
            self.host.quit()

    def handleNextPage(self, metadata):
        """Retrieve new page through RSM or quit if we're in the last page

        use to handle --all option
        @param metadata(dict): metadata as returned by psItemsGet
        """
        try:
            last = metadata[u'rsm_last']
            index = int(metadata[u'rsm_index'])
            count = int(metadata[u'rsm_count'])
        except KeyError:
            self.disp(_(u"Can't retrieve all items, RSM metadata not available"),
                      error=True)
            self.host.quit(C.EXIT_MISSING_FEATURE)
        except ValueError as e:
            self.disp(_(u"Can't retrieve all items, bad RSM metadata: {msg}")
                      .format(msg=e), error=True)
            self.host.quit(C.EXIT_ERROR)

        if index + self.args.rsm_max >= count:
            self.disp(_(u'All items transformed'))
            self.host.quit(0)

        self.disp(_(u'Retrieving next page ({page_idx}/{page_total})').format(
            page_idx = int(index/self.args.rsm_max) + 1,
            page_total = int(count/self.args.rsm_max),
            )
        )

        extra = self.getPubsubExtra()
        extra[u'rsm_after'] = last
        self.host.bridge.psItemsGet(
            self.args.service,
            self.args.node,
            self.args.rsm_max,
            self.args.items,
            "",
            extra,
            self.profile,
            callback=self.psItemsGetCb,
            errback=partial(
                self.errback,
                msg=_(u"can't retrieve items: {}"),
                exit_code=C.EXIT_BRIDGE_ERRBACK,
            ),
        )

    def psItemsGetCb(self, ps_result):
        items, metadata = ps_result
        new_items = []

        for item in items:
            if self.check_duplicates:
                # this is used when we are not ordering by creation
                # to avoid infinite loop
                item_elt, __ = xml_tools.etreeParse(self, item)
                item_id = item_elt.get('id')
                if item_id in self.items_ids:
                    self.disp(_(
                        u"Duplicate found on item {item_id}, we have probably handled "
                        u"all items.").format(item_id=item_id))
                    self.host.quit()
                self.items_ids.append(item_id)

            # we launch the command to filter the item
            try:
                p = subprocess.Popen(self.args.command_path, stdin=subprocess.PIPE,
                                                             stdout=subprocess.PIPE)
            except OSError as e:
                exit_code = C.EXIT_CMD_NOT_FOUND if e.errno == 2 else C.EXIT_ERROR
                e = str(e).decode('utf-8', errors="ignore")
                self.disp(u"Can't execute the command: {msg}".format(msg=e), error=True)
                self.host.quit(exit_code)
            cmd_std_out, cmd_std_err = p.communicate(item.encode("utf-8"))
            ret = p.wait()
            if ret != 0:
                self.disp(u"The command returned a non zero status while parsing the "
                          u"following item:\n\n{item}".format(item=item), error=True)
                if self.args.ignore_errors:
                    continue
                else:
                    self.host.quit(C.EXIT_CMD_ERROR)
            if cmd_std_err is not None:
                cmd_std_err = cmd_std_err.decode('utf-8', errors='ignore')
                self.disp(cmd_std_err, error=True)
            cmd_std_out = cmd_std_out.strip()
            if cmd_std_out == "DELETE":
                item_elt, __ = xml_tools.etreeParse(self, item)
                item_id = item_elt.get('id')
                self.disp(_(u"Deleting item {item_id}").format(item_id=item_id))
                if self.args.apply:
                    # FIXME: we don't wait for item to be retracted which can cause
                    #        trouble in case of error just before the end of the command
                    #        (the error message may be missed).
                    #        Once moved to Python 3, we must wait for it by using a
                    #        coroutine.
                    self.host.bridge.psRetractItem(
                        self.args.service,
                        self.args.node,
                        item_id,
                        False,
                        self.profile,
                        errback=partial(
                            self.errback,
                            msg=_(u"can't delete item [%s]: {}" % item_id),
                            exit_code=C.EXIT_BRIDGE_ERRBACK,
                        ),
                    )
                continue
            elif cmd_std_out == "SKIP":
                item_elt, __ = xml_tools.etreeParse(self, item)
                item_id = item_elt.get('id')
                self.disp(_(u"Skipping item {item_id}").format(item_id=item_id))
                continue
            element, etree = xml_tools.etreeParse(self, cmd_std_out)

            # at this point command has been run and we have a etree.Element object
            if element.tag not in ("item", "{http://jabber.org/protocol/pubsub}item"):
                self.disp(u"your script must return a whole item, this is not:\n{xml}"
                    .format(xml=etree.tostring(element, encoding="unicode")), error=True)
                self.host.quit(C.EXIT_DATA_ERROR)

            if not self.args.apply:
                # we have a dry run, we just display filtered items
                serialised = etree.tostring(element, encoding=u'unicode',
                                            pretty_print=True)
                self.disp(serialised)
            else:
                new_items.append(etree.tostring(element, encoding="unicode"))

        if not self.args.apply:
            # on dry run we have nothing to wait for, we can quit
            if self.args.all:
                return self.handleNextPage(metadata)
            self.host.quit()
        else:
            if self.args.admin:
                self.host.bridge.psAdminItemsSend(
                    self.args.service,
                    self.args.node,
                    new_items,
                    u"",
                    self.profile,
                    callback=partial(self.psItemsSendCb, metadata=metadata),
                    errback=partial(
                        self.errback,
                        msg=_(u"can't send item: {}"),
                        exit_code=C.EXIT_BRIDGE_ERRBACK,
                    ),
                )
            else:
                self.host.bridge.psItemsSend(
                    self.args.service,
                    self.args.node,
                    new_items,
                    u"",
                    self.profile,
                    callback=partial(self.psItemsSendCb, metadata=metadata),
                    errback=partial(
                        self.errback,
                        msg=_(u"can't send item: {}"),
                        exit_code=C.EXIT_BRIDGE_ERRBACK,
                    ),
                )

    def start(self):
        if self.args.all and self.args.order_by != C.ORDER_BY_CREATION:
            self.check_duplicates = True
            self.items_ids = []
            self.disp(A.color(
                A.FG_RED, A.BOLD,
                u'/!\\ "--all" should be used with "--order-by creation" /!\\\n',
                A.RESET,
                u"We'll update items, so order may change during transformation,\n"
                u"we'll try to mitigate that by stopping on first duplicate,\n"
                u"but this method is not safe, and some items may be missed.\n---\n"))
        else:
            self.check_duplicates = False
        self.host.bridge.psItemsGet(
            self.args.service,
            self.args.node,
            self.args.max,
            self.args.items,
            "",
            self.getPubsubExtra(),
            self.profile,
            callback=self.psItemsGetCb,
            errback=partial(
                self.errback,
                msg=_(u"can't retrieve items: {}"),
                exit_code=C.EXIT_BRIDGE_ERRBACK,
            ),
        )


class Uri(base.CommandBase):
    def __init__(self, host):
        base.CommandBase.__init__(
            self,
            host,
            "uri",
            use_profile=False,
            use_pubsub=True,
            pubsub_flags={C.NODE, C.SINGLE_ITEM},
            help=_(u"build URI"),
        )
        self.need_loop = True

    def add_parser_options(self):
        self.parser.add_argument(
            "-p",
            "--profile",
            type=base.unicode_decoder,
            default=C.PROF_KEY_DEFAULT,
            help=_(u"profile (used when no server is specified)"),
        )

    def display_uri(self, jid_):
        uri_args = {}
        if not self.args.service:
            self.args.service = jid.JID(jid_).bare

        for key in ("node", "service", "item"):
            value = getattr(self.args, key)
            if key == "service":
                key = "path"
            if value:
                uri_args[key] = value
        self.disp(uri.buildXMPPUri(u"pubsub", **uri_args))
        self.host.quit()

    def start(self):
        if not self.args.service:
            self.host.bridge.asyncGetParamA(
                u"JabberID",
                u"Connection",
                profile_key=self.args.profile,
                callback=self.display_uri,
                errback=partial(
                    self.errback,
                    msg=_(u"can't retrieve jid: {}"),
                    exit_code=C.EXIT_BRIDGE_ERRBACK,
                ),
            )
        else:
            self.display_uri(None)


class HookCreate(base.CommandBase):
    def __init__(self, host):
        base.CommandBase.__init__(
            self,
            host,
            "create",
            use_pubsub=True,
            pubsub_flags={C.NODE},
            help=_(u"create a Pubsub hook"),
        )
        self.need_loop = True

    def add_parser_options(self):
        self.parser.add_argument(
            "-t",
            "--type",
            default=u"python",
            choices=("python", "python_file", "python_code"),
            help=_(u"hook type"),
        )
        self.parser.add_argument(
            "-P",
            "--persistent",
            action="store_true",
            help=_(u"make hook persistent across restarts"),
        )
        self.parser.add_argument(
            "hook_arg",
            type=base.unicode_decoder,
            help=_(u"argument of the hook (depend of the type)"),
        )

    @staticmethod
    def checkArgs(self):
        if self.args.type == u"python_file":
            self.args.hook_arg = os.path.abspath(self.args.hook_arg)
            if not os.path.isfile(self.args.hook_arg):
                self.parser.error(
                    _(u"{path} is not a file").format(path=self.args.hook_arg)
                )

    def start(self):
        self.checkArgs(self)
        self.host.bridge.psHookAdd(
            self.args.service,
            self.args.node,
            self.args.type,
            self.args.hook_arg,
            self.args.persistent,
            self.profile,
            callback=self.host.quit,
            errback=partial(
                self.errback,
                msg=_(u"can't create hook: {}"),
                exit_code=C.EXIT_BRIDGE_ERRBACK,
            ),
        )


class HookDelete(base.CommandBase):
    def __init__(self, host):
        base.CommandBase.__init__(
            self,
            host,
            "delete",
            use_pubsub=True,
            pubsub_flags={C.NODE},
            help=_(u"delete a Pubsub hook"),
        )
        self.need_loop = True

    def add_parser_options(self):
        self.parser.add_argument(
            "-t",
            "--type",
            default=u"",
            choices=("", "python", "python_file", "python_code"),
            help=_(u"hook type to remove, empty to remove all (DEFAULT: remove all)"),
        )
        self.parser.add_argument(
            "-a",
            "--arg",
            dest="hook_arg",
            type=base.unicode_decoder,
            default=u"",
            help=_(
                u"argument of the hook to remove, empty to remove all (DEFAULT: remove all)"
            ),
        )

    def psHookRemoveCb(self, nb_deleted):
        self.disp(
            _(u"{nb_deleted} hook(s) have been deleted").format(nb_deleted=nb_deleted)
        )
        self.host.quit()

    def start(self):
        HookCreate.checkArgs(self)
        self.host.bridge.psHookRemove(
            self.args.service,
            self.args.node,
            self.args.type,
            self.args.hook_arg,
            self.profile,
            callback=self.psHookRemoveCb,
            errback=partial(
                self.errback,
                msg=_(u"can't delete hook: {}"),
                exit_code=C.EXIT_BRIDGE_ERRBACK,
            ),
        )


class HookList(base.CommandBase):
    def __init__(self, host):
        base.CommandBase.__init__(
            self,
            host,
            "list",
            use_output=C.OUTPUT_LIST_DICT,
            help=_(u"list hooks of a profile"),
        )
        self.need_loop = True

    def add_parser_options(self):
        pass

    def psHookListCb(self, data):
        if not data:
            self.disp(_(u"No hook found."))
        self.output(data)
        self.host.quit()

    def start(self):
        self.host.bridge.psHookList(
            self.profile,
            callback=self.psHookListCb,
            errback=partial(
                self.errback,
                msg=_(u"can't list hooks: {}"),
                exit_code=C.EXIT_BRIDGE_ERRBACK,
            ),
        )


class Hook(base.CommandBase):
    subcommands = (HookCreate, HookDelete, HookList)

    def __init__(self, host):
        super(Hook, self).__init__(
            host,
            "hook",
            use_profile=False,
            use_verbose=True,
            help=_("trigger action on Pubsub notifications"),
        )


class Pubsub(base.CommandBase):
    subcommands = (
        Set,
        Get,
        Delete,
        Edit,
        Subscribe,
        Unsubscribe,
        Subscriptions,
        Node,
        Affiliations,
        Search,
        Transform,
        Hook,
        Uri,
    )

    def __init__(self, host):
        super(Pubsub, self).__init__(
            host, "pubsub", use_profile=False, help=_("PubSub nodes/items management")
        )