prosody
d2333b468d07
util/xtemplate.lua

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util/xtemplate.lua @ 12907:d2333b468d07

mod_c2s: Disconnect accounts when they are disabled We decided that at the first stage, accounts that are disabled should simply be prevented from authenticating, thus they should also be prevented from having connected sessions. Since this is aimed to be a moderation action for cases of abuse, they shouldn't be allowed to continue being connected.
author Kim Alvefur <zash@zash.se>
date Thu, 23 Feb 2023 16:28:57 +0100
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 }