prosody
a3b12eeedd4b
util/xtemplate.lua

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util/xtemplate.lua @ 12471:a3b12eeedd4b

mod_smacks: Improve activation of smacks on outgoing s2s Using a timer was a hack to get around that stream features are not available at the right time and sendq stanzas were stored as strings so could not be counted properly. The later has now been fixed and the former is fixed by recording the relevant stream feature on the session so that the correct version of XEP-0198 can be activated once the connection has been authenticated and is ready to start.
author Kim Alvefur <zash@zash.se>
date Sun, 24 Apr 2022 16:17:32 +0200
parent 12213:dc9d63166488
child 12975:d10957394a3c
child 13500:997d9ad12477
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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12213
dc9d63166488 util.xtemplate: Yet another string template library
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1 local s_gsub = string.gsub;
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2 local s_match = string.match;
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3 local s_sub = string.sub;
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4 local t_concat = table.concat;
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5
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6 local st = require("util.stanza");
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7
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8 local function render(template, root, escape, filters)
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9 escape = escape or st.xml_escape;
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10
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11 return (s_gsub(template, "%b{}", function(block)
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12 local inner = s_sub(block, 2, -2);
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13 local path, pipe, pos = s_match(inner, "^([^|]+)(|?)()");
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14 if not (type(path) == "string") then return end
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15 local value
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16 if path == "." then
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17 value = root;
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18 elseif path == "#" then
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19 value = root:get_text();
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20 else
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21 value = root:find(path);
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22 end
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23 local is_escaped = false;
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24
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25 while pipe == "|" do
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26 local func, args, tmpl, p = s_match(inner, "^(%w+)(%b())(%b{})()", pos);
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27 if not func then func, args, p = s_match(inner, "^(%w+)(%b())()", pos); end
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28 if not func then func, tmpl, p = s_match(inner, "^(%w+)(%b{})()", pos); end
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29 if not func then func, p = s_match(inner, "^(%w+)()", pos); end
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30 if not func then break end
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31 if tmpl then tmpl = s_sub(tmpl, 2, -2); end
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32 if args then args = s_sub(args, 2, -2); end
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33
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34 if func == "each" and tmpl and st.is_stanza(value) then
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35 if not args then value, args = root, path; end
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36 local ns, name = s_match(args, "^(%b{})(.*)$");
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37 if ns then
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38 ns = s_sub(ns, 2, -2);
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39 else
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40 name, ns = args, nil;
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41 end
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42 if ns == "" then ns = nil; end
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43 if name == "" then name = nil; end
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44 local out, i = {}, 1;
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45 for c in (value):childtags(name, ns) do out[i], i = render(tmpl, c, escape, filters), i + 1; end
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46 value = t_concat(out);
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47 is_escaped = true;
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48 elseif func == "and" and tmpl then
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49 local condition = value;
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50 if args then condition = root:find(args); end
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51 if condition then
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52 value = render(tmpl, root, escape, filters);
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53 is_escaped = true;
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54 end
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55 elseif func == "or" and tmpl then
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56 local condition = value;
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57 if args then condition = root:find(args); end
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58 if not condition then
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59 value = render(tmpl, root, escape, filters);
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60 is_escaped = true;
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61 end
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62 elseif filters and filters[func] then
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63 local f = filters[func];
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64 if args == nil then
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65 value, is_escaped = f(value, tmpl);
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66 else
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67 value, is_escaped = f(args, value, tmpl);
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68 end
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69 else
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70 error("No such filter function: " .. func);
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71 end
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72 pipe, pos = s_match(inner, "^(|?)()", p);
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73 end
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74
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75 if type(value) == "string" then
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76 if not is_escaped then value = escape(value); end
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77 return value
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78 elseif st.is_stanza(value) then
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79 value = value:get_text();
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80 if value then return escape(value) end
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81 end
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82 return ""
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83 end))
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84 end
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85
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86 return { render = render }