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annotate mod_mam/mod_mam.lua @ 1149:d055c44a7f61

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mod_mam: Clean up and explain the code that determines who's archive we put the message in
author Kim Alvefur <zash@zash.se>
date Sun, 11 Aug 2013 23:19:35 +0200
parents 0d6ab5e4bc30
children 296820f18ba6
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1 -- XEP-0313: Message Archive Management for Prosody
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2 -- Copyright (C) 2011-2012 Kim Alvefur
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3 --
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4 -- This file is MIT/X11 licensed.
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6 local xmlns_mam = "urn:xmpp:mam:tmp";
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7 local xmlns_delay = "urn:xmpp:delay";
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8 local xmlns_forward = "urn:xmpp:forward:0";
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9
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10 local st = require "util.stanza";
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11 local rsm = module:require "rsm";
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12 local prefs = module:require"mamprefs";
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13 local prefsxml = module:require"mamprefsxml";
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14 local set_prefs, get_prefs = prefs.set, prefs.get;
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15 local prefs_to_stanza, prefs_from_stanza = prefsxml.tostanza, prefsxml.fromstanza;
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16 local jid_bare = require "util.jid".bare;
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17 local jid_split = require "util.jid".split;
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18 local jid_prep = require "util.jid".prep;
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19 local host = module.host;
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20
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21 local rm_load_roster = require "core.rostermanager".load_roster;
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22
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23 local getmetatable = getmetatable;
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24 local function is_stanza(x)
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25 return getmetatable(x) == st.stanza_mt;
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26 end
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27
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28 local tostring = tostring;
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29 local time_now = os.time;
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30 local m_min = math.min;
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31 local timestamp, timestamp_parse = require "util.datetime".datetime, require "util.datetime".parse;
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32 local default_max_items, max_max_items = 20, module:get_option_number("max_archive_query_results", 50);
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33 local global_default_policy = module:get_option("default_archive_policy", false);
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34 -- TODO Should be possible to enforce it too
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35
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36 -- For translating preference names from string to boolean and back
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37 local default_attrs = {
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38 always = true, [true] = "always",
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39 never = false, [false] = "never",
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40 roster = "roster",
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41 }
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42
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43
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44 local archive_store = "archive2";
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45 local archive = module:open_store(archive_store, "archive");
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46
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47 -- Handle prefs.
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48 module:hook("iq/self/"..xmlns_mam..":prefs", function(event)
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49 local origin, stanza = event.origin, event.stanza;
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50 local user = origin.username;
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51 if stanza.attr.type == "get" then
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52 local prefs = prefs_to_stanza(get_prefs(user));
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53 local reply = st.reply(stanza):add_child(prefs);
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54 return origin.send(reply);
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55 else -- type == "set"
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56 local new_prefs = stanza:get_child("prefs", xmlns_mam);
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57 local prefs = prefs_from_stanza(new_prefs);
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58 local ok, err = set_prefs(user, prefs);
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59 if not ok then
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60 return origin.send(st.error_reply(stanza, "cancel", "internal-server-error", "Error storing preferences: "..tostring(err)));
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61 end
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62 return origin.send(st.reply(stanza));
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63 end
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64 end);
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65
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66 -- Handle archive queries
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67 module:hook("iq-get/self/"..xmlns_mam..":query", function(event)
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68 local origin, stanza = event.origin, event.stanza;
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69 local query = stanza.tags[1];
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70 local qid = query.attr.queryid;
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71
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72 -- Search query parameters
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73 local qwith = query:get_child_text("with");
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74 local qstart = query:get_child_text("start");
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75 local qend = query:get_child_text("end");
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76 module:log("debug", "Archive query, id %s with %s from %s until %s)",
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77 tostring(qid), qwith or "anyone", qstart or "the dawn of time", qend or "now");
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78
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79 if qstart or qend then -- Validate timestamps
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80 local vstart, vend = (qstart and timestamp_parse(qstart)), (qend and timestamp_parse(qend))
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81 if (qstart and not vstart) or (qend and not vend) then
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82 origin.send(st.error_reply(stanza, "modify", "bad-request", "Invalid timestamp"))
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83 return true
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84 end
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85 qstart, qend = vstart, vend;
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86 end
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87
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88 if qwith then -- Validate the 'with' jid
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89 local pwith = qwith and jid_prep(qwith);
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90 if pwith and not qwith then -- it failed prepping
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91 origin.send(st.error_reply(stanza, "modify", "bad-request", "Invalid JID"))
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92 return true
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93 end
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94 qwith = jid_bare(pwith);
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95 end
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96
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97 -- RSM stuff
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98 local qset = rsm.get(query);
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99 local qmax = m_min(qset and qset.max or default_max_items, max_max_items);
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100 local reverse = qset and qset.before or false;
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101 local before, after = qset and qset.before, qset and qset.after;
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102 if type(before) ~= "string" then before = nil; end
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103
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104
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105 -- Load all the data!
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106 local data, err = archive:find(origin.username, {
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107 start = qstart; ["end"] = qend; -- Time range
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108 with = qwith;
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109 limit = qmax;
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110 before = before; after = after;
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111 reverse = reverse;
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112 total = true;
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113 });
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114
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115 if not data then
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116 return origin.send(st.error_reply(stanza, "cancel", "internal-server-error"));
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117 end
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118 local count = err;
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119
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120 -- Wrap it in stuff and deliver
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121 local first, last;
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122 for id, item, when in data do
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parents: 1114
diff changeset
123 local fwd_st = st.message{ to = origin.full_jid }
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parents: 1114
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124 :tag("result", { xmlns = xmlns_mam, queryid = qid, id = id })
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parents: 1114
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125 :tag("forwarded", { xmlns = xmlns_forward })
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parents: 1114
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126 :tag("delay", { xmlns = xmlns_delay, stamp = timestamp(when) }):up();
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parents: 1114
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127
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parents: 1114
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128 if not is_stanza(item) then
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parents: 1114
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129 item = st.deserialize(item);
1112
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parents: 1111
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130 end
1116
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parents: 1114
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131 item.attr.xmlns = "jabber:client";
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parents: 1114
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132 fwd_st:add_child(item);
701
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parents: 675
diff changeset
133
1116
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parents: 1114
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134 if not first then first = id; end
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Kim Alvefur <zash@zash.se>
parents: 1114
diff changeset
135 last = id;
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Kim Alvefur <zash@zash.se>
parents: 1114
diff changeset
136
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Kim Alvefur <zash@zash.se>
parents: 1114
diff changeset
137 origin.send(fwd_st);
1112
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parents: 1111
diff changeset
138 end
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parents: 1111
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139 -- That's all folks!
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Kim Alvefur <zash@zash.se>
parents: 1111
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140 module:log("debug", "Archive query %s completed", tostring(qid));
705
c9d0ba39a33b mod_mam: Move RSM pointer to last message into a MAM-namespaced child
Kim Alvefur <zash@zash.se>
parents: 702
diff changeset
141
1114
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Kim Alvefur <zash@zash.se>
parents: 1113
diff changeset
142 if reverse then first, last = last, first; end
1113
f1f0c87cffdd mod_mam: Neater reply building
Kim Alvefur <zash@zash.se>
parents: 1112
diff changeset
143 return origin.send(st.reply(stanza)
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Kim Alvefur <zash@zash.se>
parents: 1112
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144 :query(xmlns_mam):add_child(rsm.generate {
1116
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Kim Alvefur <zash@zash.se>
parents: 1114
diff changeset
145 first = first, last = last, count = count }));
523
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Kim Alvefur <zash@zash.se>
parents:
diff changeset
146 end);
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Kim Alvefur <zash@zash.se>
parents:
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147
558
66de25ffc8d9 mod_mam: Implement archiving preferences.
Kim Alvefur <zash@zash.se>
parents: 523
diff changeset
148 local function has_in_roster(user, who)
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Kim Alvefur <zash@zash.se>
parents: 523
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149 local roster = rm_load_roster(user, host);
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parents: 523
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150 module:log("debug", "%s has %s in roster? %s", user, who, roster[who] and "yes" or "no");
798
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Kim Alvefur <zash@zash.se>
parents: 751
diff changeset
151 return roster[who];
558
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parents: 523
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152 end
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parents: 523
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153
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parents: 523
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154 local function shall_store(user, who)
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Kim Alvefur <zash@zash.se>
parents: 523
diff changeset
155 -- TODO Cache this?
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Kim Alvefur <zash@zash.se>
parents: 523
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156 local prefs = get_prefs(user);
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Kim Alvefur <zash@zash.se>
parents: 523
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157 local rule = prefs[who];
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parents: 523
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158 module:log("debug", "%s's rule for %s is %s", user, who, tostring(rule))
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parents: 523
diff changeset
159 if rule ~= nil then
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parents: 523
diff changeset
160 return rule;
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Kim Alvefur <zash@zash.se>
parents: 523
diff changeset
161 else -- Below could be done by a metatable
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parents: 523
diff changeset
162 local default = prefs[false];
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parents: 523
diff changeset
163 module:log("debug", "%s's default rule is %s", user, tostring(default))
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Kim Alvefur <zash@zash.se>
parents: 523
diff changeset
164 if default == nil then
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Kim Alvefur <zash@zash.se>
parents: 523
diff changeset
165 default = global_default_policy;
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parents: 523
diff changeset
166 module:log("debug", "Using global default rule, %s", tostring(default))
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parents: 523
diff changeset
167 end
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parents: 523
diff changeset
168 if default == "roster" then
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parents: 523
diff changeset
169 return has_in_roster(user, who);
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parents: 523
diff changeset
170 end
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parents: 523
diff changeset
171 return default;
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parents: 523
diff changeset
172 end
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Kim Alvefur <zash@zash.se>
parents: 523
diff changeset
173 end
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Kim Alvefur <zash@zash.se>
parents: 523
diff changeset
174
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parents: 523
diff changeset
175 -- Handle messages
523
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Kim Alvefur <zash@zash.se>
parents:
diff changeset
176 local function message_handler(event, c2s)
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Kim Alvefur <zash@zash.se>
parents:
diff changeset
177 local origin, stanza = event.origin, event.stanza;
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Kim Alvefur <zash@zash.se>
parents:
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178 local orig_type = stanza.attr.type or "normal";
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Kim Alvefur <zash@zash.se>
parents:
diff changeset
179 local orig_from = stanza.attr.from;
1149
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parents: 1135
diff changeset
180 local orig_to = stanza.attr.to or orig_from;
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parents: 1135
diff changeset
181 -- Stanza without 'to' are treated as if it was to their own bare jid
523
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parents:
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182
eff140d53b83 mod_mam: Add experimental implementation of the Message Archive Management ProtoXEP
Kim Alvefur <zash@zash.se>
parents:
diff changeset
183 -- Don't store messages of these types
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Kim Alvefur <zash@zash.se>
parents:
diff changeset
184 if orig_type == "error"
eff140d53b83 mod_mam: Add experimental implementation of the Message Archive Management ProtoXEP
Kim Alvefur <zash@zash.se>
parents:
diff changeset
185 or orig_type == "headline"
671
74efb2db00a6 mod_mam: From the spec: servers SHOULD NOT archive messages that do not have a <body/> child tag.
Thijs Alkemade <thijsalkemade@gmail.com>
parents: 666
diff changeset
186 or orig_type == "groupchat"
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Thijs Alkemade <thijsalkemade@gmail.com>
parents: 666
diff changeset
187 or not stanza:get_child("body") then
523
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Kim Alvefur <zash@zash.se>
parents:
diff changeset
188 return;
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Kim Alvefur <zash@zash.se>
parents:
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189 end
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Kim Alvefur <zash@zash.se>
parents:
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190
1149
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parents: 1135
diff changeset
191 -- Whos storage do we put it in?
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Kim Alvefur <zash@zash.se>
parents: 1135
diff changeset
192 local store_user = c2s and origin.username or jid_split(orig_to);
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parents: 1135
diff changeset
193 -- And who are they chatting with?
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Kim Alvefur <zash@zash.se>
parents: 1135
diff changeset
194 local with = jid_bare(c2s and orig_to or orig_from);
558
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Kim Alvefur <zash@zash.se>
parents: 523
diff changeset
195
1149
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parents: 1135
diff changeset
196 -- Check with the users preferences
d055c44a7f61 mod_mam: Clean up and explain the code that determines who's archive we put the message in
Kim Alvefur <zash@zash.se>
parents: 1135
diff changeset
197 if shall_store(store_user, with) then
558
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Kim Alvefur <zash@zash.se>
parents: 523
diff changeset
198 module:log("debug", "Archiving stanza: %s", stanza:top_tag());
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Kim Alvefur <zash@zash.se>
parents: 523
diff changeset
199
66de25ffc8d9 mod_mam: Implement archiving preferences.
Kim Alvefur <zash@zash.se>
parents: 523
diff changeset
200 -- And stash it
1149
d055c44a7f61 mod_mam: Clean up and explain the code that determines who's archive we put the message in
Kim Alvefur <zash@zash.se>
parents: 1135
diff changeset
201 local ok, id = archive:append(store_user, time_now(), with, stanza);
1094
158680bff642 mod_mam: Stamp <archived> on incoming stanzas after archiving them
Kim Alvefur <zash@zash.se>
parents: 1093
diff changeset
202 if ok and not c2s then
1149
d055c44a7f61 mod_mam: Clean up and explain the code that determines who's archive we put the message in
Kim Alvefur <zash@zash.se>
parents: 1135
diff changeset
203 stanza:tag("archived", { xmlns = xmlns_mam, by = store_user.."@"..host, id = id }):up();
672
8ae5317ba032 mod_mam: local tostring and some comments
Kim Alvefur <zash@zash.se>
parents: 671
diff changeset
204 end
558
66de25ffc8d9 mod_mam: Implement archiving preferences.
Kim Alvefur <zash@zash.se>
parents: 523
diff changeset
205 else
66de25ffc8d9 mod_mam: Implement archiving preferences.
Kim Alvefur <zash@zash.se>
parents: 523
diff changeset
206 module:log("debug", "Not archiving stanza: %s", stanza:top_tag());
66de25ffc8d9 mod_mam: Implement archiving preferences.
Kim Alvefur <zash@zash.se>
parents: 523
diff changeset
207 end
523
eff140d53b83 mod_mam: Add experimental implementation of the Message Archive Management ProtoXEP
Kim Alvefur <zash@zash.se>
parents:
diff changeset
208 end
eff140d53b83 mod_mam: Add experimental implementation of the Message Archive Management ProtoXEP
Kim Alvefur <zash@zash.se>
parents:
diff changeset
209
eff140d53b83 mod_mam: Add experimental implementation of the Message Archive Management ProtoXEP
Kim Alvefur <zash@zash.se>
parents:
diff changeset
210 local function c2s_message_handler(event)
eff140d53b83 mod_mam: Add experimental implementation of the Message Archive Management ProtoXEP
Kim Alvefur <zash@zash.se>
parents:
diff changeset
211 return message_handler(event, true);
eff140d53b83 mod_mam: Add experimental implementation of the Message Archive Management ProtoXEP
Kim Alvefur <zash@zash.se>
parents:
diff changeset
212 end
eff140d53b83 mod_mam: Add experimental implementation of the Message Archive Management ProtoXEP
Kim Alvefur <zash@zash.se>
parents:
diff changeset
213
eff140d53b83 mod_mam: Add experimental implementation of the Message Archive Management ProtoXEP
Kim Alvefur <zash@zash.se>
parents:
diff changeset
214 -- Stanzas sent by local clients
621
7bdd02056e2b mod_mam: Bumb priority up above carbons, so that archive ids are included
Kim Alvefur <zash@zash.se>
parents: 620
diff changeset
215 module:hook("pre-message/bare", c2s_message_handler, 2);
7bdd02056e2b mod_mam: Bumb priority up above carbons, so that archive ids are included
Kim Alvefur <zash@zash.se>
parents: 620
diff changeset
216 module:hook("pre-message/full", c2s_message_handler, 2);
523
eff140d53b83 mod_mam: Add experimental implementation of the Message Archive Management ProtoXEP
Kim Alvefur <zash@zash.se>
parents:
diff changeset
217 -- Stanszas to local clients
621
7bdd02056e2b mod_mam: Bumb priority up above carbons, so that archive ids are included
Kim Alvefur <zash@zash.se>
parents: 620
diff changeset
218 module:hook("message/bare", message_handler, 2);
7bdd02056e2b mod_mam: Bumb priority up above carbons, so that archive ids are included
Kim Alvefur <zash@zash.se>
parents: 620
diff changeset
219 module:hook("message/full", message_handler, 2);
523
eff140d53b83 mod_mam: Add experimental implementation of the Message Archive Management ProtoXEP
Kim Alvefur <zash@zash.se>
parents:
diff changeset
220
eff140d53b83 mod_mam: Add experimental implementation of the Message Archive Management ProtoXEP
Kim Alvefur <zash@zash.se>
parents:
diff changeset
221 module:add_feature(xmlns_mam);
558
66de25ffc8d9 mod_mam: Implement archiving preferences.
Kim Alvefur <zash@zash.se>
parents: 523
diff changeset
222