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sql.js
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sql.js
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function Migrator(config, transactionDb) {
this.db = transactionDb;
this.dbname = config.adapter.db_name;
this.table = config.adapter.collection_name;
this.idAttribute = config.adapter.idAttribute;
this.column = function(name) {
var parts = name.split(/\s+/);
var type = parts[0];
switch (type.toLowerCase()) {
case "string":
case "varchar":
case "date":
case "datetime":
Ti.API.warn('"' + type + '" is not a valid sqlite field, using TEXT instead');
case "text":
type = "TEXT";
break;
case "int":
case "tinyint":
case "smallint":
case "bigint":
case "boolean":
Ti.API.warn('"' + type + '" is not a valid sqlite field, using INTEGER instead');
case "integer":
type = "INTEGER";
break;
case "double":
case "float":
case "decimal":
case "number":
Ti.API.warn('"' + name + '" is not a valid sqlite field, using REAL instead');
case "real":
type = "REAL";
break;
case "blob":
type = "BLOB";
break;
case "null":
type = "NULL";
break;
default:
type = "TEXT";
}
parts[0] = type;
return parts.join(" ");
};
this.createTable = function(config) {
var columns = [];
var found = false;
for (var k in config.columns) {
k === this.idAttribute && (found = true);
columns.push(k + " " + this.column(config.columns[k]));
}
found || this.idAttribute !== ALLOY_ID_DEFAULT || columns.push(ALLOY_ID_DEFAULT + " TEXT UNIQUE");
var sql = "CREATE TABLE IF NOT EXISTS " + this.table + " ( " + columns.join(",") + ")";
this.db.execute(sql);
};
this.dropTable = function() {
this.db.execute("DROP TABLE IF EXISTS " + this.table);
};
this.insertRow = function(columnValues) {
var columns = [];
var values = [];
var qs = [];
var found = false;
for (var key in columnValues) {
key === this.idAttribute && (found = true);
columns.push(key);
values.push(columnValues[key]);
qs.push("?");
}
if (!found && this.idAttribute === ALLOY_ID_DEFAULT) {
columns.push(this.idAttribute);
values.push(util.guid());
qs.push("?");
}
this.db.execute("INSERT INTO " + this.table + " (" + columns.join(",") + ") VALUES (" + qs.join(",") + ");", values);
};
this.deleteRow = function(columns) {
var sql = "DELETE FROM " + this.table;
var keys = _.keys(columns);
var len = keys.length;
var conditions = [];
var values = [];
len && (sql += " WHERE ");
for (var i = 0; len > i; i++) {
conditions.push(keys[i] + " = ?");
values.push(columns[keys[i]]);
}
sql += conditions.join(" AND ");
this.db.execute(sql, values);
};
}
function Sync(method, model, opts) {
var db, table = model.config.adapter.collection_name, columns = model.config.columns, dbName = model.config.adapter.db_name || ALLOY_DB_DEFAULT, resp = null;
switch (method) {
case "create":
case "update":
resp = function() {
var attrObj = {};
if (!model.id) {
model.id = model.idAttribute === ALLOY_ID_DEFAULT ? util.guid() : null;
attrObj[model.idAttribute] = model.id;
model.set(attrObj, {
silent: true
});
}
var names = [], values = [], q = [];
for (var k in columns) {
names.push(k);
values.push(model.get(k));
q.push("?");
}
var sql = "REPLACE INTO " + table + " (" + names.join(",") + ") VALUES (" + q.join(",") + ");";
db = Ti.Database.open(dbName);
db.execute("BEGIN;");
db.execute(sql, values);
if (null === model.id) {
var sqlId = "SELECT last_insert_rowid();";
var rs = db.execute(sqlId);
if (rs && rs.isValidRow()) {
model.id = rs.field(0);
attrObj[model.idAttribute] = model.id;
model.set(attrObj, {
silent: true
});
} else Ti.API.warn("Unable to get ID from database for model: " + model.toJSON());
rs && rs.close();
}
db.execute("COMMIT;");
db.close();
return model.toJSON();
}();
break;
case "read":
var sql = opts.query || "SELECT * FROM " + table;
db = Ti.Database.open(dbName);
var rs;
rs = _.isString(sql) ? db.execute(sql) : db.execute(sql.statement, sql.params);
var len = 0;
var values = [];
while (rs.isValidRow()) {
var o = {};
var fc = 0;
fc = _.isFunction(rs.fieldCount) ? rs.fieldCount() : rs.fieldCount;
_.times(fc, function(c) {
var fn = rs.fieldName(c);
o[fn] = rs.fieldByName(fn);
});
values.push(o);
len++;
rs.next();
}
rs.close();
db.close();
model.length = len;
resp = 1 === len ? values[0] : values;
break;
case "delete":
var sql = "DELETE FROM " + table + " WHERE " + model.idAttribute + "=?";
db = Ti.Database.open(dbName);
db.execute(sql, model.id);
db.close();
model.id = null;
resp = model.toJSON();
}
if (resp) {
_.isFunction(opts.success) && opts.success(resp);
"read" === method && model.trigger("fetch");
} else _.isFunction(opts.error) && opts.error(resp);
}
function GetMigrationFor(dbname, table) {
var mid = null;
var db = Ti.Database.open(dbname);
db.execute("CREATE TABLE IF NOT EXISTS migrations (latest TEXT, model TEXT);");
var rs = db.execute("SELECT latest FROM migrations where model = ?;", table);
if (rs.isValidRow()) var mid = rs.field(0) + "";
rs.close();
db.close();
return mid;
}
function Migrate(Model) {
var migrations = Model.migrations || [];
var lastMigration = {};
migrations.length && migrations[migrations.length - 1](lastMigration);
var config = Model.prototype.config;
config.adapter.db_name || (config.adapter.db_name = ALLOY_DB_DEFAULT);
var migrator = new Migrator(config);
var targetNumber = "undefined" == typeof config.adapter.migration || null === config.adapter.migration ? lastMigration.id : config.adapter.migration;
if ("undefined" == typeof targetNumber || null === targetNumber) {
var tmpDb = Ti.Database.open(config.adapter.db_name);
migrator.db = tmpDb;
migrator.createTable(config);
tmpDb.close();
return;
}
targetNumber += "";
var currentNumber = GetMigrationFor(config.adapter.db_name, config.adapter.collection_name);
var direction;
if (currentNumber === targetNumber) return;
if (currentNumber && currentNumber > targetNumber) {
direction = 0;
migrations.reverse();
} else direction = 1;
db = Ti.Database.open(config.adapter.db_name);
migrator.db = db;
db.execute("BEGIN;");
if (migrations.length) for (var i = 0; migrations.length > i; i++) {
var migration = migrations[i];
var context = {};
migration(context);
if (direction) {
if (context.id > targetNumber) break;
if (currentNumber >= context.id) continue;
} else {
if (targetNumber >= context.id) break;
if (context.id > currentNumber) continue;
}
var funcName = direction ? "up" : "down";
_.isFunction(context[funcName]) && context[funcName](migrator);
} else migrator.createTable(config);
db.execute("DELETE FROM migrations where model = ?", config.adapter.collection_name);
db.execute("INSERT INTO migrations VALUES (?,?)", targetNumber, config.adapter.collection_name);
db.execute("COMMIT;");
db.close();
migrator.db = null;
}
function installDatabase(config) {
var dbFile = config.adapter.db_file;
var table = config.adapter.collection_name;
var rx = /^([\/]{0,1})([^\/]+)\.[^\/]+$/;
var match = dbFile.match(rx);
if (null === match) throw 'Invalid sql database filename "' + dbFile + '"';
var dbName = config.adapter.db_name = match[2];
Ti.API.debug('Installing sql database "' + dbFile + '" with name "' + dbName + '"');
var db = Ti.Database.install(dbFile, dbName);
var rs = db.execute('pragma table_info("' + table + '");');
var columns = {};
while (rs.isValidRow()) {
var cName = rs.fieldByName("name");
var cType = rs.fieldByName("type");
columns[cName] = cType;
cName !== ALLOY_ID_DEFAULT || config.adapter.idAttribute || (config.adapter.idAttribute = ALLOY_ID_DEFAULT);
rs.next();
}
config.columns = columns;
rs.close();
if (config.adapter.idAttribute) {
if (!_.contains(_.keys(config.columns), config.adapter.idAttribute)) throw 'config.adapter.idAttribute "' + config.adapter.idAttribute + '" not found in list of columns for table "' + table + '"\n' + "columns: [" + _.keys(config.columns).join(",") + "]";
} else {
Ti.API.info('No config.adapter.idAttribute specified for table "' + table + '"');
Ti.API.info('Adding "' + ALLOY_ID_DEFAULT + '" to uniquely identify rows');
var fullStrings = [], colStrings = [];
_.each(config.columns, function(type, name) {
colStrings.push(name);
fullStrings.push(name + " " + type);
});
var colsString = colStrings.join(",");
db.execute("ALTER TABLE " + table + " RENAME TO " + table + "_temp;");
db.execute("CREATE TABLE " + table + "(" + fullStrings.join(",") + "," + ALLOY_ID_DEFAULT + " TEXT UNIQUE);");
db.execute("INSERT INTO " + table + "(" + colsString + "," + ALLOY_ID_DEFAULT + ") SELECT " + colsString + ",CAST(_ROWID_ AS TEXT) FROM " + table + "_temp;");
db.execute("DROP TABLE " + table + "_temp;");
config.columns[ALLOY_ID_DEFAULT] = "TEXT UNIQUE";
config.adapter.idAttribute = ALLOY_ID_DEFAULT;
}
db.close();
}
var _ = require("alloy/underscore")._, util = require("alloy/sync/util");
var ALLOY_DB_DEFAULT = "_alloy_";
var ALLOY_ID_DEFAULT = "alloy_id";
var cache = {
config: {},
Model: {}
};
module.exports.beforeModelCreate = function(config, name) {
if (cache.config[name]) return cache.config[name];
if (false || "undefined" == typeof Ti.Database) throw "No support for Titanium.Database in MobileWeb environment.";
config.adapter.db_file && installDatabase(config);
if (!config.adapter.idAttribute) {
Ti.API.info('No config.adapter.idAttribute specified for table "' + config.adapter.collection_name + '"');
Ti.API.info('Adding "' + ALLOY_ID_DEFAULT + '" to uniquely identify rows');
config.columns[ALLOY_ID_DEFAULT] = "TEXT UNIQUE";
config.adapter.idAttribute = ALLOY_ID_DEFAULT;
}
cache.config[name] = config;
return config;
};
module.exports.afterModelCreate = function(Model, name) {
if (cache.Model[name]) return cache.Model[name];
Model || (Model = {});
Model.prototype.idAttribute = Model.prototype.config.adapter.idAttribute;
Migrate(Model);
cache.Model[name] = Model;
return Model;
};
module.exports.sync = Sync;