prosody
c1b3ecbed6c0
plugins/mod_storage_sql.lua

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plugins/mod_storage_sql.lua @ 4004:c1b3ecbed6c0

mod_storage_sql: Removed unnecessary initialization of a variable.
author Waqas Hussain <waqas20@gmail.com>
date Wed, 05 Jan 2011 06:23:58 +0500
parent 3980:6b2fac6602b3
child 4007:062b849ca088
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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1
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2 --[[
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3
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4 DB Tables:
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5 Prosody - key-value, map
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6 | host | user | store | key | type | value |
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7 ProsodyArchive - list
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8 | host | user | store | key | time | stanzatype | jsonvalue |
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10 Mapping:
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11 Roster - Prosody
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12 | host | user | "roster" | "contactjid" | type | value |
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13 | host | user | "roster" | NULL | "json" | roster[false] data |
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14 Account - Prosody
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15 | host | user | "accounts" | "username" | type | value |
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17 Offline - ProsodyArchive
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18 | host | user | "offline" | "contactjid" | time | "message" | json|XML |
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20 ]]
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22 local type = type;
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23 local tostring = tostring;
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24 local tonumber = tonumber;
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25 local pairs = pairs;
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26 local next = next;
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27 local setmetatable = setmetatable;
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28 local json = require "util.json";
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30 local connection;
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31 local host,user,store = module.host;
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32 local params = module:get_option("sql");
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33
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34 do -- process options to get a db connection
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35 local DBI = require "DBI";
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36
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37 params = params or { driver = "SQLite3", database = "prosody.sqlite" };
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38 assert(params.driver and params.database, "invalid params");
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40 prosody.unlock_globals();
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41 local dbh, err = DBI.Connect(
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42 params.driver, params.database,
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43 params.username, params.password,
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44 params.host, params.port
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45 );
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46 prosody.lock_globals();
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47 assert(dbh, err);
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48
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49 dbh:autocommit(false); -- don't commit automatically
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50 connection = dbh;
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51
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52 if params.driver == "SQLite3" then -- auto initialize
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53 local stmt = assert(connection:prepare("SELECT COUNT(*) FROM `sqlite_master` WHERE `type`='table' AND `name`='Prosody';"));
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54 local ok = assert(stmt:execute());
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55 local count = stmt:fetch()[1];
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56 if count == 0 then
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57 local stmt = assert(connection:prepare("CREATE TABLE `Prosody` (`host` TEXT, `user` TEXT, `store` TEXT, `key` TEXT, `type` TEXT, `value` TEXT);"));
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58 assert(stmt:execute());
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59 module:log("debug", "Initialized new SQLite3 database");
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60 end
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61 assert(connection:commit());
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62 --print("===", json.encode())
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63 end
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64 end
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65
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66 local function serialize(value)
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67 local t = type(value);
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68 if t == "string" or t == "boolean" or t == "number" then
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69 return t, tostring(value);
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70 elseif t == "table" then
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71 local value,err = json.encode(value);
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72 if value then return "json", value; end
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73 return nil, err;
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74 end
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75 return nil, "Unhandled value type: "..t;
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76 end
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77 local function deserialize(t, value)
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78 if t == "string" then return value;
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79 elseif t == "boolean" then
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80 if value == "true" then return true;
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81 elseif value == "false" then return false; end
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82 elseif t == "number" then return tonumber(value);
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83 elseif t == "json" then
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84 return json.decode(value);
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85 end
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86 end
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87
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88 local function getsql(sql, ...)
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89 if params.driver == "PostgreSQL" then
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90 sql = sql:gsub("`", "\"");
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91 end
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92 -- do prepared statement stuff
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93 local stmt, err = connection:prepare(sql);
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94 if not stmt then module:log("error", "QUERY FAILED: %s %s", err, debug.traceback()); return nil, err; end
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95 -- run query
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96 local ok, err = stmt:execute(host or "", user or "", store or "", ...);
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97 if not ok then return nil, err; end
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98
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99 return stmt;
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100 end
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101 local function setsql(sql, ...)
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102 local stmt, err = getsql(sql, ...);
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103 if not stmt then return stmt, err; end
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104 return stmt:affected();
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105 end
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106 local function transact(...)
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107 -- ...
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108 end
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109 local function rollback(...)
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110 connection:rollback(); -- FIXME check for rollback error?
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111 return ...;
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112 end
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113 local function commit(...)
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114 if not connection:commit() then return nil, "SQL commit failed"; end
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115 return ...;
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116 end
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117
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118 local keyval_store = {};
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119 keyval_store.__index = keyval_store;
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120 function keyval_store:get(username)
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121 user,store = username,self.store;
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122 local stmt, err = getsql("SELECT * FROM `Prosody` WHERE `host`=? AND `user`=? AND `store`=?");
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123 if not stmt then return nil, err; end
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124
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125 local haveany;
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126 local result = {};
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127 for row in stmt:rows(true) do
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128 haveany = true;
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129 local k = row.key;
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130 local v = deserialize(row.type, row.value);
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131 if k and v then
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132 if k ~= "" then result[k] = v; elseif type(v) == "table" then
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133 for a,b in pairs(v) do
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134 result[a] = b;
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135 end
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136 end
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137 end
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138 end
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139 return commit(haveany and result or nil);
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140 end
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141 function keyval_store:set(username, data)
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142 user,store = username,self.store;
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143 -- start transaction
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144 local affected, err = setsql("DELETE FROM `Prosody` WHERE `host`=? AND `user`=? AND `store`=?");
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145
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146 if data and next(data) ~= nil then
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147 local extradata = {};
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148 for key, value in pairs(data) do
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149 if type(key) == "string" and key ~= "" then
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150 local t, value = serialize(value);
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151 if not t then return rollback(t, value); end
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152 local ok, err = setsql("INSERT INTO `Prosody` (`host`,`user`,`store`,`key`,`type`,`value`) VALUES (?,?,?,?,?,?)", key, t, value);
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153 if not ok then return rollback(ok, err); end
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154 else
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155 extradata[key] = value;
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156 end
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157 end
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158 if next(extradata) ~= nil then
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159 local t, extradata = serialize(extradata);
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160 if not t then return rollback(t, extradata); end
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161 local ok, err = setsql("INSERT INTO `Prosody` (`host`,`user`,`store`,`key`,`type`,`value`) VALUES (?,?,?,?,?,?)", "", t, extradata);
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162 if not ok then return rollback(ok, err); end
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163 end
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164 end
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165 return commit(true);
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166 end
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167
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168 local map_store = {};
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169 map_store.__index = map_store;
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170 function map_store:get(username, key)
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171 user,store = username,self.store;
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172 local stmt, err = getsql("SELECT * FROM `Prosody` WHERE `host`=? AND `user`=? AND `store`=? AND `key`=?", key or "");
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173 if not stmt then return nil, err; end
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174
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175 local haveany;
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176 local result = {};
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177 for row in stmt:rows(true) do
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178 haveany = true;
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179 local k = row.key;
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180 local v = deserialize(row.type, row.value);
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181 if k and v then
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182 if k ~= "" then result[k] = v; elseif type(v) == "table" then
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183 for a,b in pairs(v) do
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184 result[a] = b;
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185 end
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186 end
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187 end
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188 end
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189 return commit(haveany and result[key] or nil);
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190 end
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191 function map_store:set(username, key, data)
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192 user,store = username,self.store;
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193 -- start transaction
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194 local affected, err = setsql("DELETE FROM `Prosody` WHERE `host`=? AND `user`=? AND `store`=? AND `key`=?", key or "");
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195
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196 if data and next(data) ~= nil then
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197 if type(key) == "string" and key ~= "" then
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198 local t, value = serialize(data);
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199 if not t then return rollback(t, value); end
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200 local ok, err = setsql("INSERT INTO `Prosody` (`host`,`user`,`store`,`key`,`type`,`value`) VALUES (?,?,?,?,?,?)", key, t, value);
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201 if not ok then return rollback(ok, err); end
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202 else
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203 -- TODO non-string keys
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204 end
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205 end
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206 return commit(true);
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207 end
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208
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209 local list_store = {};
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210 list_store.__index = list_store;
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211 function list_store:scan(username, from, to, jid, typ)
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212 user,store = username,self.store;
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213
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214 local cols = {"from", "to", "jid", "typ"};
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215 local vals = { from , to , jid , typ };
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216 local stmt, err;
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217 local query = "SELECT * FROM `ProsodyArchive` WHERE `host`=? AND `user`=? AND `store`=?";
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218
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219 query = query.." ORDER BY time";
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220 --local stmt, err = getsql("SELECT * FROM `Prosody` WHERE `host`=? AND `user`=? AND `store`=? AND `key`=?", key or "");
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221
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222 return nil, "not-implemented"
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223 end
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224
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225 local driver = { name = "sql" };
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226
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227 function driver:open(store, typ)
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228 if not typ then -- default key-value store
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229 return setmetatable({ store = store }, keyval_store);
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230 end
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231 return nil, "unsupported-store";
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232 end
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233
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234 module:add_item("data-driver", driver);