Mercurial > prosody-modules

annotate mod_storage_appendmap/mod_storage_appendmap.lua @ 5820:742142f9771e

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mod_groups_internal: Fix traceback when room doesn't exist I'm not sure if it should even be included if it doesn't exist, but I'm not currently sure how this situation occurs, so I'm implementing the lightest possible fix for now.
author Matthew Wild <mwild1@gmail.com>
date Thu, 11 Jan 2024 15:53:18 +0000
parents 78f766372e2c
children
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
2061
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1 local dump = require "util.serialization".serialize;
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2 local load = require "util.envload".envloadfile;
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3 local datetime = require "util.datetime".datetime;
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4 local dm = require "core.storagemanager".olddm;
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5
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6 local REMOVE = {}; -- Special value for removing keys
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7
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8 local driver = {};
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9
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10 local timestamps = module:get_option_boolean("appendmap_timestamps", true);
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11
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12 local keywords = {
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13 ["do"] = true; ["and"] = true; ["else"] = true; ["break"] = true;
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14 ["if"] = true; ["end"] = true; ["goto"] = true; ["false"] = true;
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15 ["in"] = true; ["for"] = true; ["then"] = true; ["local"] = true;
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16 ["or"] = true; ["nil"] = true; ["true"] = true; ["until"] = true;
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17 ["elseif"] = true; ["function"] = true; ["not"] = true;
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18 ["repeat"] = true; ["return"] = true; ["while"] = true;
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19
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20 -- _ENV is not technically a keyword but we need to treat it as such
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21 ["_ENV"] = true;
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22 };
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23
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24 local function is_usable_identifier(s)
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25 return type(s) == "string" and not keywords[s] and s:find("^[%a_][%w_]*$");
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26 end
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27
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28 local function serialize_key(key)
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29 if is_usable_identifier(key) then
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30 return key;
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31 else
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32 return "_ENV[" .. dump(key) .. "]";
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33 end
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34 end
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35
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36 local function serialize_value(value)
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37 if value == REMOVE then
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38 return "nil";
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39 else
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40 return dump(value);
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41 end
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42 end
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43
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44 local function serialize_pair(key, value)
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45 key = serialize_key(key);
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46 value = serialize_value(value);
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47 return key .. " = " .. value .. ";\n";
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48 end
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49
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50 local function serialize_map(keyvalues)
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51 local keys, values = {}, {};
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52 for key, value in pairs(keyvalues) do
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53 key = serialize_key(key);
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54 value = serialize_value(value);
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55 table.insert(keys, key);
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56 table.insert(values, value);
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57 end
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58 return table.concat(keys, ", ") .. " = " .. table.concat(values, ", ") .. ";\n";
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59 end
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60
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61 local map = { remove = REMOVE };
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62 local map_mt = { __index = map };
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63
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64 function map:get(user, key)
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65 module:log("debug", "map:get(%s, %s)", tostring(user), tostring(key))
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66 local filename = dm.getpath(user, module.host, self.store, "map");
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67 module:log("debug", "File is %s", filename);
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68 local env = {};
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69 if _VERSION == "Lua 5.1" then -- HACK
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70 env._ENV = env; -- HACK
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71 end -- SO MANY HACKS
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72 local chunk, err, errno = load(filename, env);
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73 if not chunk then if errno == 2 then return end return chunk, err; end
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74 local ok, err = pcall(chunk);
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75 if not ok then return ok, err; end
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76 if _VERSION == "Lua 5.1" then -- HACK
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77 env._ENV = nil; -- HACK
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78 end -- HACKS EVERYWHERE
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79 if key == nil then
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80 return env;
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81 end
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82 return env[key];
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83 end
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84
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85 function map:set_keys(user, keyvalues)
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86 local data = serialize_map(keyvalues);
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87 if timestamps then
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88 data = "-- " .. datetime() .. "\n" .. data;
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89 end
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90 return dm.append_raw(user, module.host, self.store, "map", data);
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91 end
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92
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93 function map:set(user, key, value)
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94 if _VERSION == "Lua 5.1" then
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95 assert(key ~= "_ENV", "'_ENV' is a restricted key");
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96 end
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97 if key == nil then
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98 local filename = dm.getpath(user, module.host, self.store, "map");
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99 return os.remove(filename);
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100 end
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101 local data = serialize_pair(key, value);
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102 if timestamps then
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103 data = "-- " .. datetime() .. "\n" .. data;
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104 end
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105 return dm.append_raw(user, module.host, self.store, "map", data);
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106 end
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107
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108 function map:items()
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109 return dm.users(module.host, self.store, "map");
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110 end
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111
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112 local keyval = { remove = REMOVE };
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113 local keyval_mt = { __index = keyval };
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114
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115 function keyval:get(user)
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116 return map.get(self, user, nil);
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117 end
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118
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119 function keyval:set(user, keyvalues)
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120 local data = serialize_map(keyvalues);
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121 if timestamps then
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122 data = "-- " .. datetime() .. "\n" .. data;
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123 end
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124 return dm.store_raw(dm.getpath(user, module.host, self.store, "map"), data);
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125 end
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126
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127 function keyval:users()
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128 return dm.users(module.host, self.store, "map");
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129 end
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130
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131 -- TODO some kind of periodic compaction thing?
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132 function map:_compact(user)
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133 local data = self:get(user);
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134 return keyval.set(self, user, data);
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135 end
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136
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137 function driver:open(store, typ)
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138 if typ == "map" then
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139 return setmetatable({ store = store, }, map_mt);
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140 elseif typ == nil or typ == "keyval" then
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141 return setmetatable({ store = store, }, keyval_mt);
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142 end
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143 return nil, "unsupported-store";
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144 end
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145
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146 module:provides("storage", driver);
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147