verse
ab4773b0ef5e
plugins/vcard_update.lua

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plugins/vcard_update.lua @ 242:ab4773b0ef5e

verse: Add default log handler for errors
author Matthew Wild <mwild1@gmail.com>
date Sun, 27 Nov 2011 23:00:15 +0000
parent 229:279c0e89c3b3
child 244:6dbd61ecd5d0
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
196
eb9d69d3f0b5 plugins.vcard_update: Support for XEP-153 avatar hash in presence broadcasts
Kim Alvefur <zash@zash.se>
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1 local xmlns_vcard, xmlns_vcard_update = "vcard-temp", "vcard-temp:x:update";
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2
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3 -- MMMmmmm.. hacky
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4 local ok, fun = pcall(function() return require("util.hashes").sha1; end);
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5 if not ok then
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6 ok, fun = pcall(function() return require("util.sha1").sha1; end);
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7 if not ok then
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8 error("Could not find a sha1()")
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9 end
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10 end
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11 local sha1 = fun;
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12
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13 local ok, fun = pcall(function()
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14 local unb64 = require("util.encodings").base64.decode;
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15 assert(unb64("SGVsbG8=") == "Hello")
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16 return unb64;
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17 end);
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18 if not ok then
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19 ok, fun = pcall(function() return require("mime").unb64; end);
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20 if not ok then
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21 error("Could not find a base64 decoder")
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22 end
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23 end
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24 local unb64 = fun;
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25
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26 function verse.plugins.vcard_update(stream)
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27 stream:add_plugin("vcard");
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28 stream:add_plugin("presence");
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29
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30
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31 local x_vcard_update;
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32
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33 function update_vcard_photo(vCard)
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34 local data;
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35 for i=1,#vCard do
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36 if vCard[i].name == "PHOTO" then
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37 data = vCard[i][1];
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38 break
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39 end
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40 end
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41 if data then
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42 local hash = sha1(unb64(data), true);
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43 x_vcard_update = verse.stanza("x", { xmlns = xmlns_vcard_update })
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44 :tag("photo"):text(hash);
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45
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46 stream:resend_presence()
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47 else
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48 x_vcard_update = nil;
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49 end
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50 end
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51
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52 local _set_vcard = stream.set_vcard;
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53
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54 --[[ TODO Complete this, it's probably broken.
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55 -- Maybe better to hook outgoing stanza?
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56 function stream:set_vcard(vCard, callback)
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57 _set_vcard(vCard, function(event, ...)
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58 if event.attr.type == "result" then
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59 local vCard_ = response:get_child("vCard", xmlns_vcard);
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60 if vCard_ then
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61 update_vcard_photo(vCard_);
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62 end -- Or fetch it again? Seems wasteful, but if the server overrides stuff? :/
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63 end
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64 if callback then
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65 return callback(event, ...);
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66 end
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67 end);
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68 end
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69 --]]
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70
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71 local initial_vcard_fetch_started;
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72 stream:hook("ready", function(event)
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73 if initial_vcard_fetch_started then return; end
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74 initial_vcard_fetch_started = true;
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75 -- if stream:jid_supports(nil, xmlns_vcard) then TODO this, correctly
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76 stream:get_vcard(nil, function(response)
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77 if response then
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78 update_vcard_photo(response)
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79 end
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80 stream:event("ready");
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81 end);
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82 return true;
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83 end, 3);
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84
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85 stream:hook("presence-out", function(presence)
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86 if x_vcard_update and not presence:get_child("x", xmlns_vcard_update) then
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87 presence:add_child(x_vcard_update);
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88 end
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89 end, 10);
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90
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91 --[[
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92 stream:hook("presence", function(presence)
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93 local x_vcard_update = presence:get_child("x", xmlns_vcard_update);
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94 local photo_hash = x_vcard_update and x_vcard_update:get_child("photo");
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95 :get_child("photo"):get_text(hash);
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96 if x_vcard_update then
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97 -- TODO Cache peoples avatars here
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98 end
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99 end);
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100 --]]
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101 end