prosody
41a587613a0e
util/xtemplate.lua

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util/xtemplate.lua @ 13419:41a587613a0e

mod_smacks: Adjust buckets for resumption age statistic Given that there are recommendations floating around recommending 24 hours session lifetime, having buckets up to 10 minutes wouldn't be useful in that case. Would be nice if we had some way to automatically assign suitable number series for buckets, scaled to what the configuration might be.
author Kim Alvefur <zash@zash.se>
date Fri, 16 Feb 2024 00:15:36 +0100
parent 13394:6debd8dd12ab
child 13499:1f93e4f78c53
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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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("prosody.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, "(%s*)(%b{})(%s*)", function(pre_blank, block, post_blank)
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12 local inner = s_sub(block, 2, -2);
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13 if inner:sub(1, 1) == "-" then
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14 pre_blank = "";
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15 inner = inner:sub(2);
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16 end
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17 if inner:sub(-1, -1) == "-" then
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18 post_blank = "";
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19 inner = inner:sub(1, -2);
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20 end
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21 local path, pipe, pos = s_match(inner, "^([^|]+)(|?)()");
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22 if not (type(path) == "string") then return end
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23 local value
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24 if path == "." then
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25 value = root;
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26 elseif path == "#" then
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27 value = root:get_text();
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28 else
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29 value = root:find(path);
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30 end
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31 local is_escaped = false;
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32
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33 while pipe == "|" do
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34 local func, args, tmpl, p = s_match(inner, "^(%w+)(%b())(%b{})()", pos);
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35 if not func then func, args, p = s_match(inner, "^(%w+)(%b())()", pos); end
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36 if not func then func, tmpl, p = s_match(inner, "^(%w+)(%b{})()", pos); end
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37 if not func then func, p = s_match(inner, "^(%w+)()", pos); end
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38 if not func then break end
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39 if tmpl then tmpl = s_sub(tmpl, 2, -2); end
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40 if args then args = s_sub(args, 2, -2); end
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41
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42 if func == "each" and tmpl and st.is_stanza(value) then
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43 if not args then value, args = root, path; end
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44 local ns, name = s_match(args, "^(%b{})(.*)$");
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45 if ns then
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46 ns = s_sub(ns, 2, -2);
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47 else
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48 name, ns = args, nil;
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49 end
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50 if ns == "" then ns = nil; end
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51 if name == "" then name = nil; end
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52 local out, i = {}, 1;
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53 for c in (value):childtags(name, ns) do out[i], i = render(tmpl, c, escape, filters), i + 1; end
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54 value = t_concat(out);
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55 is_escaped = true;
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56 elseif func == "and" and tmpl then
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57 local condition = value;
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58 if args then condition = root:find(args); end
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59 if condition then
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60 value = render(tmpl, root, escape, filters);
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61 is_escaped = true;
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62 end
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63 elseif func == "or" and tmpl then
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64 local condition = value;
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65 if args then condition = root:find(args); end
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66 if not condition then
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67 value = render(tmpl, root, escape, filters);
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68 is_escaped = true;
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69 end
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70 elseif filters and filters[func] then
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71 local f = filters[func];
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72 if args == nil then
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73 value, is_escaped = f(value, tmpl);
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74 else
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75 value, is_escaped = f(args, value, tmpl);
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76 end
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77 else
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78 error("No such filter function: " .. func);
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79 end
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80 pipe, pos = s_match(inner, "^(|?)()", p);
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81 end
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82
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83 if type(value) == "string" then
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84 if not is_escaped then value = escape(value); end
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85 return pre_blank .. value .. post_blank
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86 elseif st.is_stanza(value) then
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87 value = value:get_text();
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88 if value then return pre_blank .. escape(value) .. post_blank end
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89 end
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90 return pre_blank .. post_blank
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91 end))
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92 end
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93
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94 return { render = render }