prosody
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util/xml.lua

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util/xml.lua @ 10684:de607875d4bd

MUC: Pass previous role to :publicise_occupant_status() whenever possible Currently there is what amounts to a hack in presence_broadcast.lib.lua to make it always broadcast presence with roles of "none". This is to ensure that if you previously saw available presence for someone, you will also see the unavailable presence (which always has role="none"). The correct approach is to take into account what the previous role was ( i.e. answer the question: "Was the available presence for this occupant a role for which presence broadcast is enabled?). The logic is already in place to do this correctly, but most call sites do not provide the previous role (prev_role argument) of the occupant, which causes it to not be used. In its place the hack to always broadcast presence of role="none" has allowed things to continue to work. The intention is that a subsequent commit will remove the unconditional broadcast of role="none".
author Matthew Wild <mwild1@gmail.com>
date Thu, 12 Mar 2020 14:10:12 +0000
parent 8555:4f0f5b49bb03
child 11127:1d9cd1abc660
child 12181:783056b4e448
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1
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2 local st = require "util.stanza";
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3 local lxp = require "lxp";
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4 local t_insert = table.insert;
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5 local t_remove = table.remove;
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6
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7 local _ENV = nil;
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8 -- luacheck: std none
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10 local parse_xml = (function()
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11 local ns_prefixes = {
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12 ["http://www.w3.org/XML/1998/namespace"] = "xml";
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13 };
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14 local ns_separator = "\1";
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15 local ns_pattern = "^([^"..ns_separator.."]*)"..ns_separator.."?(.*)$";
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16 return function(xml)
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17 --luacheck: ignore 212/self
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18 local handler = {};
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19 local stanza = st.stanza("root");
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20 local namespaces = {};
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21 local prefixes = {};
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22 function handler:StartNamespaceDecl(prefix, url)
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23 if prefix ~= nil then
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24 t_insert(namespaces, url);
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25 t_insert(prefixes, prefix);
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26 end
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27 end
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28 function handler:EndNamespaceDecl(prefix)
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29 if prefix ~= nil then
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30 -- we depend on each StartNamespaceDecl having a paired EndNamespaceDecl
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31 t_remove(namespaces);
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32 t_remove(prefixes);
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33 end
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34 end
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35 function handler:StartElement(tagname, attr)
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36 local curr_ns,name = tagname:match(ns_pattern);
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37 if name == "" then
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38 curr_ns, name = "", curr_ns;
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39 end
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40 if curr_ns ~= "" then
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41 attr.xmlns = curr_ns;
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42 end
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43 for i=1,#attr do
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44 local k = attr[i];
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45 attr[i] = nil;
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46 local ns, nm = k:match(ns_pattern);
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47 if nm ~= "" then
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48 ns = ns_prefixes[ns];
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49 if ns then
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50 attr[ns..":"..nm] = attr[k];
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51 attr[k] = nil;
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52 end
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53 end
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54 end
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55 local n = {}
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56 for i=1,#namespaces do
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57 n[prefixes[i]] = namespaces[i];
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58 end
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59 stanza:tag(name, attr, n);
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60 end
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61 function handler:CharacterData(data)
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62 stanza:text(data);
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63 end
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64 function handler:EndElement()
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65 stanza:up();
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66 end
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67 local parser = lxp.new(handler, "\1");
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68 local ok, err, line, col = parser:parse(xml);
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69 if ok then ok, err, line, col = parser:parse(); end
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70 --parser:close();
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71 if ok then
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72 return stanza.tags[1];
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73 else
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74 return ok, err.." (line "..line..", col "..col..")";
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75 end
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76 end;
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77 end)();
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78
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79 return {
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80 parse = parse_xml;
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81 };