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annotate mod_slack_webhooks/mod_slack_webhooks.lua @ 3148:8c7b8b2c3237

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mod_slack_webhooks: Add a special webhook target for debugging
author Kim Alvefur <zash@zash.se>
date Sun, 03 Jun 2018 02:18:02 +0200
parents 82689acd1294
children 284d8c18060e
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1 -- Allow Slack-style incoming and outgoing hooks to MUC rooms
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2 -- Based on mod_muc_intercom and mod_post_msg
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3 -- Copyright 2016-2017 Nathan Whitehorn <nwhitehorn@physics.ucla.edu>
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4 --
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5 -- This file is MIT/X11 licensed.
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6
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7 module:depends"http"
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8
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9 local host_session = prosody.hosts[module.host];
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10 local msg = require "util.stanza".message;
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11 local jid = require "util.jid";
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12 local now = require "util.datetime".datetime;
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13 local json = require "util.json"
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14 local formdecode = require "net.http".formdecode;
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15 local http = require "net.http";
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16 local dataform = require "util.dataforms";
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17
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18 local function get_room_from_jid(mod_muc, room_jid)
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19 if mod_muc.get_room_from_jid then
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20 return mod_muc.get_room_from_jid(room_jid);
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21 elseif mod_muc.rooms then
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22 return mod_muc.rooms[room_jid]; -- COMPAT 0.9, 0.10
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23 end
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24 end
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25
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26 local button_ns = "xmpp:prosody.im/community/mod_slack_webhooks#buttons";
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27 local routing = module:get_option("outgoing_webhook_routing") or {};
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28 local listen_path = module:get_option("incoming_webhook_path") or "/webhook";
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29 local default_from_nick = module:get_option("incoming_webhook_default_nick") or "Bot";
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30
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31 function postcallback(_, code)
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32 module:log("debug", "HTTP result %d", code)
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33 end
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34
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35 function check_message(data)
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36 local stanza = data.stanza;
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37 local mod_muc = host_session.muc;
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38 if not mod_muc then return; end
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39
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40 local this_room = get_room_from_jid(mod_muc, stanza.attr.to);
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41 if not this_room then return; end -- no such room
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42
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43 local from_room_jid = this_room._jid_nick[stanza.attr.from];
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44 if not from_room_jid then return; end -- no such nick
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45
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46 local from_room, from_host, from_nick = jid.split(from_room_jid);
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47
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48 local body = stanza:get_child("body");
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49 if not body then return; end -- No body, like topic changes
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50 body = body and body:get_text(); -- I feel like I want to do `or ""` there :/
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51
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52 if not routing[from_room] then
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53 return;
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54 end
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55
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56 local json_out = {
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57 channel_name = from_room,
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58 timestamp = now(),
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59 text = body,
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60 team_domain = from_host,
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61 user_name = from_nick,
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62 };
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63
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64 local form = stanza:get_child("x", "jabber:x:form");
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65 if form and form.attr.type == "submit" then
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66 local callback_id, button_name, button_value;
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67 for field in form:childtags("field") do
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68 if field.attr.var == "callback_id" then
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69 button_name = field:get_child_text("text");
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70 elseif field.attr.var == "button_name" then
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71 button_name = field:get_child_text("text");
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72 elseif field.attr.var ~= "FORM_TYPE" or field:get_child_text("text") ~= button_ns then
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73 callback_id, button_name, button_value = nil, nil, nil;
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74 break;
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75 end
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76 end
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77 if callback_id and button_name and button_value then
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78 json_out.callback_id = callback_id;
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79 json_out.actions = {
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80 { type = "button", name = button_name, value = button_value }
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81 };
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82 end
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83 end
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84
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85 local stanzaid = stanza:get_child("id");
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86 if stanzaid and string.sub(stanzaid,1,string.len("webhookbot"))=="webhookbot" then
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87 json_out["bot_id"] = "webhookbot";
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88 end
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89
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90 json_out = json.encode(json_out)
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91 local url = routing[from_room];
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92 module:log("debug", "message from %s in %s to %s", from_nick, from_room, url);
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93 if url == "DEBUG" then
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94 module:log("debug", "json_out = %s", json_out);
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95 return;
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96 end
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97 local headers = {
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98 ["Content-Type"] = "application/json",
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99 };
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100 http.request(url, { method = "POST", body = json_out, headers = headers }, postcallback)
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101 end
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102
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103 module:hook("message/bare", check_message, 10);
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104
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105 local function route_post(f)
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106 return function(event, path)
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107 local bare_room = jid.join(path, module.host);
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108 local mod_muc = host_session.muc;
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109 if not get_room_from_jid(mod_muc, bare_room) then
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110 module:log("warn", "mod_slack_webhook: invalid JID: %s", bare_room);
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111 return 404;
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112 end
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113 -- Check secret?
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114 return f(event, path)
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115 end
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116 end
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117
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118 local function handle_post(event, path)
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119 local mod_muc = host_session.muc;
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120 local request = event.request;
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121 local headers = request.headers;
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122
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123 local body_type = headers.content_type;
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124 local post_body;
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125 if body_type == "application/x-www-form-urlencoded" then
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126 post_body = formdecode(request.body);
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parents:
diff changeset
127 elseif body_type == "application/json" then
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diff changeset
128 post_body = json.decode(request.body)
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diff changeset
129 if not post_body then
3000
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parents:
diff changeset
130 return 420;
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parents:
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131 end
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parents:
diff changeset
132 else
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parents:
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133 return 422;
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parents:
diff changeset
134 end
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parents:
diff changeset
135 local bare_room = jid.join(path, module.host);
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136 local dest_room = get_room_from_jid(mod_muc, bare_room);
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parents:
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137 local from_nick = default_from_nick;
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parents:
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138 if post_body["username"] then
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parents:
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139 from_nick = post_body["username"];
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parents:
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140 end
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parents:
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141 local sender = jid.join(path, module.host, from_nick);
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parents:
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142 module:log("debug", "message to %s from %s", bare_room, sender);
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parents:
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143 module:log("debug", "body: %s", post_body["text"]);
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144 local message = msg({ to = bare_room, from = sender, type = "groupchat", id="webhookbot" .. now()},post_body["text"]);
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145
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146 if type(post_body["attachments"]) == "table" then -- Buttons?
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147 -- luacheck: ignore 631
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148 -- defensive against JSON having whatever data in it, enjoy
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149
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150 for _, attachment in ipairs(post_body["attachments"]) do
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151 if type(attachment) == "table" and type(attachment.actions) == "table" and type(attachment.callback_id) == "string" then
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152 local buttons = {};
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153 local button_name;
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154 for _, action in ipairs(attachment.actions) do
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parents: 3097
diff changeset
155 if type(attachment.text) == "string" then
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parents: 3097
diff changeset
156 buttons.label = attachment.text;
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diff changeset
157 end
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parents: 3097
diff changeset
158 if type(action) == "table" and action.type == "button" and type(action.name) == "string" and type(action.value) == "string" then
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parents: 3097
diff changeset
159 if not button_name then
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parents: 3097
diff changeset
160 button_name = action.name;
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parents: 3097
diff changeset
161 end
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Kim Alvefur <zash@zash.se>
parents: 3097
diff changeset
162 if button_name == action.name then
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diff changeset
163 local button = {
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diff changeset
164 value = action.value;
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parents: 3097
diff changeset
165 };
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Kim Alvefur <zash@zash.se>
parents: 3097
diff changeset
166 if type(action.text) == "string" then
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parents: 3097
diff changeset
167 button.label = action.text;
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Kim Alvefur <zash@zash.se>
parents: 3097
diff changeset
168 end
662423cea3f4 mod_slack_webhooks: Add support for buttons
Kim Alvefur <zash@zash.se>
parents: 3097
diff changeset
169 table.insert(buttons, button);
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parents: 3097
diff changeset
170 end
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Kim Alvefur <zash@zash.se>
parents: 3097
diff changeset
171 end
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Kim Alvefur <zash@zash.se>
parents: 3097
diff changeset
172 end
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Kim Alvefur <zash@zash.se>
parents: 3097
diff changeset
173 if button_name then
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parents: 3097
diff changeset
174 message:add_direct_child(dataform.new({
662423cea3f4 mod_slack_webhooks: Add support for buttons
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parents: 3097
diff changeset
175 {
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parents: 3097
diff changeset
176 type = "hidden", name = "FORM_TYPE",
3147
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Kim Alvefur <zash@zash.se>
parents: 3146
diff changeset
177 value = button_ns,
3146
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parents: 3097
diff changeset
178 },
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Kim Alvefur <zash@zash.se>
parents: 3097
diff changeset
179 {
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parents: 3097
diff changeset
180 type = "hidden", name = "callback_id",
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diff changeset
181 value = attachment.callback_id,
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parents: 3097
diff changeset
182 },
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parents: 3097
diff changeset
183 {
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parents: 3097
diff changeset
184 type = "hidden", name = "button_name",
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parents: 3097
diff changeset
185 value = button_name,
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parents: 3097
diff changeset
186 },
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Kim Alvefur <zash@zash.se>
parents: 3097
diff changeset
187 {
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parents: 3097
diff changeset
188 type = "list-single", name = "buttons",
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parents: 3097
diff changeset
189 value = "", -- FIXME util.dataforms can't do options without a value
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parents: 3097
diff changeset
190 options = buttons;
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Kim Alvefur <zash@zash.se>
parents: 3097
diff changeset
191 }
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Kim Alvefur <zash@zash.se>
parents: 3097
diff changeset
192 }):form());
662423cea3f4 mod_slack_webhooks: Add support for buttons
Kim Alvefur <zash@zash.se>
parents: 3097
diff changeset
193 break;
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Kim Alvefur <zash@zash.se>
parents: 3097
diff changeset
194 end
662423cea3f4 mod_slack_webhooks: Add support for buttons
Kim Alvefur <zash@zash.se>
parents: 3097
diff changeset
195 end
662423cea3f4 mod_slack_webhooks: Add support for buttons
Kim Alvefur <zash@zash.se>
parents: 3097
diff changeset
196 end
662423cea3f4 mod_slack_webhooks: Add support for buttons
Kim Alvefur <zash@zash.se>
parents: 3097
diff changeset
197 end
3000
02fc3b64cbb7 Initial commit of mod_slack_webhooks.
Nathan Whitehorn <nwhitehorn@physics.ucla.edu>
parents:
diff changeset
198 dest_room:broadcast_message(message, true);
02fc3b64cbb7 Initial commit of mod_slack_webhooks.
Nathan Whitehorn <nwhitehorn@physics.ucla.edu>
parents:
diff changeset
199 return 201;
02fc3b64cbb7 Initial commit of mod_slack_webhooks.
Nathan Whitehorn <nwhitehorn@physics.ucla.edu>
parents:
diff changeset
200 end
02fc3b64cbb7 Initial commit of mod_slack_webhooks.
Nathan Whitehorn <nwhitehorn@physics.ucla.edu>
parents:
diff changeset
201
02fc3b64cbb7 Initial commit of mod_slack_webhooks.
Nathan Whitehorn <nwhitehorn@physics.ucla.edu>
parents:
diff changeset
202 module:provides("http", {
02fc3b64cbb7 Initial commit of mod_slack_webhooks.
Nathan Whitehorn <nwhitehorn@physics.ucla.edu>
parents:
diff changeset
203 default_path = listen_path;
02fc3b64cbb7 Initial commit of mod_slack_webhooks.
Nathan Whitehorn <nwhitehorn@physics.ucla.edu>
parents:
diff changeset
204 route = {
02fc3b64cbb7 Initial commit of mod_slack_webhooks.
Nathan Whitehorn <nwhitehorn@physics.ucla.edu>
parents:
diff changeset
205 ["POST /*"] = route_post(handle_post);
02fc3b64cbb7 Initial commit of mod_slack_webhooks.
Nathan Whitehorn <nwhitehorn@physics.ucla.edu>
parents:
diff changeset
206 OPTIONS = function(e)
02fc3b64cbb7 Initial commit of mod_slack_webhooks.
Nathan Whitehorn <nwhitehorn@physics.ucla.edu>
parents:
diff changeset
207 local headers = e.response.headers;
02fc3b64cbb7 Initial commit of mod_slack_webhooks.
Nathan Whitehorn <nwhitehorn@physics.ucla.edu>
parents:
diff changeset
208 headers.allow = "POST";
02fc3b64cbb7 Initial commit of mod_slack_webhooks.
Nathan Whitehorn <nwhitehorn@physics.ucla.edu>
parents:
diff changeset
209 headers.accept = "application/x-www-form-urlencoded, application/json";
02fc3b64cbb7 Initial commit of mod_slack_webhooks.
Nathan Whitehorn <nwhitehorn@physics.ucla.edu>
parents:
diff changeset
210 return 200;
02fc3b64cbb7 Initial commit of mod_slack_webhooks.
Nathan Whitehorn <nwhitehorn@physics.ucla.edu>
parents:
diff changeset
211 end;
02fc3b64cbb7 Initial commit of mod_slack_webhooks.
Nathan Whitehorn <nwhitehorn@physics.ucla.edu>
parents:
diff changeset
212 }
02fc3b64cbb7 Initial commit of mod_slack_webhooks.
Nathan Whitehorn <nwhitehorn@physics.ucla.edu>
parents:
diff changeset
213 });
02fc3b64cbb7 Initial commit of mod_slack_webhooks.
Nathan Whitehorn <nwhitehorn@physics.ucla.edu>
parents:
diff changeset
214