prosody-modules
a0937b5cfdcb
mod_storage_appendmap/mod_storage_appendmap.lua

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mod_storage_appendmap/mod_storage_appendmap.lua @ 4210:a0937b5cfdcb

mod_invites_page: Remove preauth URI button This button is incompatible with the majority of XMPP clients around, yet based on feedback from users, many are drawn to click it when they have any XMPP client installed already. In the case where the user already has software installed, we would prefer them to select it from the software list so they can follow the setup process suited to their specific client (we already track which software supports preauth URIs). If their client is not listed, they can still use the manual registration link instead.
author Matthew Wild <mwild1@gmail.com>
date Fri, 16 Oct 2020 11:03:38 +0100
parent 2796:6a7b7cb7148e
child 5061:e44b868cc575
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
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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 dm = require "core.storagemanager".olddm;
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4
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5 local REMOVE = {}; -- Special value for removing keys
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6
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7 local driver = {};
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8
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9
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10 local keywords = {
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11 ["do"] = true; ["and"] = true; ["else"] = true; ["break"] = true;
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12 ["if"] = true; ["end"] = true; ["goto"] = true; ["false"] = true;
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13 ["in"] = true; ["for"] = true; ["then"] = true; ["local"] = true;
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14 ["or"] = true; ["nil"] = true; ["true"] = true; ["until"] = true;
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15 ["elseif"] = true; ["function"] = true; ["not"] = true;
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16 ["repeat"] = true; ["return"] = true; ["while"] = true;
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17
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18 -- _ENV is not technically a keyword but we need to treat it as such
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19 ["_ENV"] = true;
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20 };
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21
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22 local function is_usable_identifier(s)
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23 return type(s) == "string" and not keywords[s] and s:find("^[%a_][%w_]*$");
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24 end
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25
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26 local function serialize_key(key)
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27 if is_usable_identifier(key) then
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28 return key;
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29 else
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30 return "_ENV[" .. dump(key) .. "]";
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31 end
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32 end
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33
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34 local function serialize_value(value)
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35 if value == REMOVE then
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36 return "nil";
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37 else
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38 return dump(value);
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39 end
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40 end
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41
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42 local function serialize_pair(key, value)
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43 key = serialize_key(key);
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44 value = serialize_value(value);
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45 return key .. " = " .. value .. ";\n";
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46 end
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47
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48 local function serialize_map(keyvalues)
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49 local keys, values = {}, {};
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50 for key, value in pairs(keyvalues) do
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51 key = serialize_key(key);
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52 value = serialize_value(value);
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53 table.insert(keys, key);
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54 table.insert(values, value);
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55 end
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56 return table.concat(keys, ", ") .. " = " .. table.concat(values, ", ") .. ";\n";
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57 end
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58
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59 local map = { remove = REMOVE };
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60 local map_mt = { __index = map };
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61
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62 function map:get(user, key)
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63 module:log("debug", "map:get(%s, %s)", tostring(user), tostring(key))
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64 local filename = dm.getpath(user, module.host, self.store, "map");
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65 module:log("debug", "File is %s", filename);
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66 local env = {};
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67 if _VERSION == "Lua 5.1" then -- HACK
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68 env._ENV = env; -- HACK
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69 end -- SO MANY HACKS
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70 local chunk, err, errno = load(filename, env);
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71 if not chunk then if errno == 2 then return end return chunk, err; end
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72 local ok, err = pcall(chunk);
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73 if not ok then return ok, err; end
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74 if _VERSION == "Lua 5.1" then -- HACK
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75 env._ENV = nil; -- HACK
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76 end -- HACKS EVERYWHERE
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77 if key == nil then
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78 return env;
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79 end
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80 return env[key];
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81 end
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82
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83 function map:set_keys(user, keyvalues)
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84 local data = serialize_map(keyvalues);
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85 return dm.append_raw(user, module.host, self.store, "map", data);
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86 end
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87
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88 function map:set(user, key, value)
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89 if _VERSION == "Lua 5.1" then
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90 assert(key ~= "_ENV", "'_ENV' is a restricted key");
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91 end
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92 if key == nil then
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93 local filename = dm.getpath(user, module.host, self.store, "map");
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94 return os.remove(filename);
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95 end
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96 local data = serialize_pair(key, value);
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97 return dm.append_raw(user, module.host, self.store, "map", data);
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98 end
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99
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100 local keyval = { remove = REMOVE };
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101 local keyval_mt = { __index = keyval };
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102
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103 function keyval:get(user)
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104 return map.get(self, user, nil);
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105 end
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106
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107 function keyval:set(user, keyvalues)
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108 local data = serialize_map(keyvalues);
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109 return dm.store_raw(user, module.host, self.store, "map", data);
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110 end
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111
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112 -- TODO some kind of periodic compaction thing?
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113 function map:_compact(user)
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114 local data = self:get(user);
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115 return keyval.set(self, user, data);
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116 end
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117
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118 function driver:open(store, typ)
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119 if typ == "map" then
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120 return setmetatable({ store = store, }, map_mt);
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121 elseif typ == nil or typ == "keyval" then
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122 return setmetatable({ store = store, }, keyval_mt);
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123 end
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124 return nil, "unsupported-store";
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125 end
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126
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127 module:provides("storage", driver);
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128