prosody
cc0ec0277813
util/xtemplate.lua

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util/xtemplate.lua @ 12553:cc0ec0277813 0.12

util.startup: Fix async waiting for last shutdown steps Observed problem: When shutting down prosody would immediately exit after waiting for s2s connections to close, skipping the last cleanup events and reporting the exit reason and code. This happens because prosody.main_thread is in a waiting state and queuing startup.shutdown is dispatched trough the main loop via nexttick, but since the main loop was no longer running at that point it proceeded to the end of the prosody script and exited there.
author Kim Alvefur <zash@zash.se>
date Tue, 14 Jun 2022 16:28:49 +0200
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 }