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6b84d11aa09b
util/xtemplate.lua

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util/xtemplate.lua @ 13633:6b84d11aa09b

mod_storage_sql: Detect SQLite3 without UPSERT (or SQLCipher 3.x) SQLCipher v3.4.1 (the version in Debian 12) is based on SQLite3 v3.15.2, while UPSERT support was introduced in SQLite3 v3.24.0 This check was not needed before because we v3.24.0 has not been in a version of Debian we support for a long, long time. Note however that SQLCipher databases are not compatible across major versions, upgrading from v3.x to v4.x requires executing a migration. Attempts at making `prosodyctl mod_storage_sql upgrade` perform such a migration has not been successful. Executing the following in the `sqlcipher` tool should do the migration: PRAGMA key = '<key material>'; PRAGMA cipher_migrate;
author Kim Alvefur <zash@zash.se>
date Thu, 23 Jan 2025 19:33:05 +0100
parent 13525:0f7e7311eebf
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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 then
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43 if not st.is_stanza(value) then return pre_blank .. post_blank end
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44 if not args then value, args = root, path; end
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45 local ns, name = s_match(args, "^(%b{})(.*)$");
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46 if ns then
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47 ns = s_sub(ns, 2, -2);
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48 else
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49 name, ns = args, nil;
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50 end
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51 if ns == "" then ns = nil; end
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52 if name == "" then name = nil; end
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53 local out, i = {}, 1;
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54 for c in (value):childtags(name, ns) do out[i], i = render(tmpl, c, escape, filters), i + 1; end
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55 value = t_concat(out);
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56 is_escaped = true;
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57 elseif func == "and" and tmpl then
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58 local condition = value;
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59 if args then condition = root:find(args); end
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60 if condition then
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61 value = render(tmpl, root, escape, filters);
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62 is_escaped = true;
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63 end
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64 elseif func == "or" and tmpl then
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65 local condition = value;
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66 if args then condition = root:find(args); end
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67 if not condition then
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68 value = render(tmpl, root, escape, filters);
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69 is_escaped = true;
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70 end
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71 elseif filters and filters[func] then
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72 local f = filters[func];
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73 value, is_escaped = f(value, args, tmpl);
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74 else
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75 error("No such filter function: " .. func);
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76 end
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77 pipe, pos = s_match(inner, "^(|?)()", p);
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78 end
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79
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80 if type(value) == "string" then
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81 if not is_escaped then value = escape(value); end
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82 return pre_blank .. value .. post_blank
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83 elseif st.is_stanza(value) then
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84 value = value:get_text();
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85 if value then return pre_blank .. escape(value) .. post_blank end
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86 end
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87 return pre_blank .. post_blank
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88 end))
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89 end
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90
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91 return { render = render }