sqlite3-cluster.js/wrapper.js

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'use strict';
var sqlite3 = require('sqlite3');
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// TODO expire unused dbs from cache
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var dbs = {};
function sanitize(str) {
return String(str).replace("'", "''");
}
function create(opts, verbs) {
if (!verbs) {
verbs = {};
}
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if (!opts) {
opts = {};
}
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var db;
var PromiseA = verbs.Promise || require('bluebird');
var dbname = "";
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dbname += (opts.prefix || '');
if (opts.subtenant) {
dbname += opts.subtenant + '.';
}
if (opts.tenant) {
dbname += opts.tenant + '.';
}
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dbname += (opts.dbname || '');
dbname += (opts.suffix || '');
dbname += (opts.ext || '');
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dbname = require('path').resolve(opts.dirname || '', dbname);
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function initDb(newOpts) {
if (dbs[dbname].initPromise) {
return dbs[dbname].initPromise;
}
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if (!newOpts) {
newOpts = {};
}
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var key = newOpts.key || opts.key;
var bits = newOpts.bits || opts.bits;
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dbs[dbname].initPromise = new PromiseA(function (resolve, reject) {
if (dbs[dbname].db._initialized) {
resolve(db);
return;
}
if (!key) {
if (!bits) {
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//console.log("INITIALIZED WITHOUT KEY");
//console.log(opts);
dbs[dbname].db._initialized = true;
}
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dbs[dbname].db = db;
resolve(db);
return;
}
// TODO test key length
db.serialize(function () {
var setup = [];
if (!bits) {
bits = 128;
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}
// TODO db.run(sql, function () { resolve() });
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setup.push(new PromiseA(function (resolve, reject) {
db.run("PRAGMA KEY = \"x'" + sanitize(key) + "'\"", [], function (err) {
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if (err) { reject(err); return; }
resolve(this);
});
}));
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setup.push(new PromiseA(function (resolve, reject) {
//process.nextTick(function () {
db.run("PRAGMA CIPHER = 'aes-" + sanitize(bits) + "-cbc'", [], function (err) {
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if (err) { reject(err); return; }
resolve(this);
});
//});
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}));
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PromiseA.all(setup).then(function () {
// restore original functions
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dbs[dbname].db._initialized = true;
dbs[dbname].db = db;
resolve(db);
}, reject);
});
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});
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return dbs[dbname].initPromise;
}
function newDb() {
// dbs[dbname] = db //
db = new sqlite3.Database(dbname);
db.init = initDb;
db.sanitize = sanitize;
db.escape = sanitize;
if (opts.verbose) {
sqlite3.verbose();
}
return db;
}
// Could be any of:
// * db object
// * init promise
if (!dbs[dbname]) {
dbs[dbname] = { db: newDb() };
}
if (dbs[dbname].db._initialized) {
return PromiseA.resolve(dbs[dbname].db);
}
if (opts.init || ('init' === opts.type) || (opts.bits && opts.key)) {
dbs[dbname].initPromise = db.init(opts);
}
return dbs[dbname].initPromise || PromiseA.resolve(dbs[dbname].db);
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}
module.exports.sanitize = sanitize;
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module.exports.escape = sanitize;
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module.exports.Database = sqlite3.Database;
module.exports.create = create;