prosody
4f1fe6eb1ddb
util/xtemplate.lua

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util/xtemplate.lua @ 12301:4f1fe6eb1ddb

mod_c2s,mod_s2s: Wait for sessions to close before proceeding with shutdown steps Ensures unavailable presence and other outgoing stanzas are sent. Waiting for c2s sessions to close first before proceeding to disable and close s2s ensures that unavailable presence can go out, even if it requires dialback to complete first.
author Kim Alvefur <zash@zash.se>
date Thu, 17 Feb 2022 03:49:47 +0100
parent 12213:dc9d63166488
child 12975:d10957394a3c
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 }