320 lines
7.7 KiB
JavaScript
320 lines
7.7 KiB
JavaScript
var safeRequire = require('../utils').safeRequire;
|
|
|
|
/**
|
|
* Module dependencies
|
|
*/
|
|
var cradle = safeRequire('cradle');
|
|
|
|
/**
|
|
* Private functions for internal use
|
|
*/
|
|
function CradleAdapter(client) {
|
|
this._models = {};
|
|
this.client = client;
|
|
}
|
|
|
|
function createdbif(client, callback) {
|
|
client.exists(function (err, exists) {
|
|
if(err) callback(err);
|
|
if (!exists) { client.create(function() { callback(); }); }
|
|
else { callback(); }
|
|
});
|
|
}
|
|
|
|
function naturalize(data, model) {
|
|
data.nature = model;
|
|
//TODO: maybe this is not a really good idea
|
|
if(data.date) data.date = data.date.toString();
|
|
return data;
|
|
}
|
|
function idealize(data) {
|
|
data.id = data._id;
|
|
return data;
|
|
}
|
|
function stringify(data) {
|
|
return data ? data.toString() : data
|
|
}
|
|
|
|
function errorHandler(callback, func) {
|
|
return function(err, res) {
|
|
if(err) {
|
|
callback(err);
|
|
} else {
|
|
if(func) {
|
|
func(res, function(res) {
|
|
callback(null, res);
|
|
});
|
|
} else {
|
|
callback(null, res);
|
|
}
|
|
}
|
|
}
|
|
};
|
|
|
|
function synchronize(functions, args, callback) {
|
|
if(functions.length === 0) callback();
|
|
if(functions.length > 0 && args.length === functions.length) {
|
|
functions[0](args[0][0], args[0][1], function(err, res) {
|
|
if(err) callback(err);
|
|
functions.splice(0, 1);
|
|
args.splice(0, 1);
|
|
synchronize(functions, args, callback);
|
|
});
|
|
}
|
|
};
|
|
|
|
function applyFilter(filter) {
|
|
if (typeof filter.where === 'function') {
|
|
return filter.where;
|
|
}
|
|
var keys = Object.keys(filter.where);
|
|
return function (obj) {
|
|
var pass = true;
|
|
keys.forEach(function (key) {
|
|
if (!test(filter.where[key], obj[key])) {
|
|
pass = false;
|
|
}
|
|
});
|
|
return pass;
|
|
}
|
|
|
|
function test(example, value) {
|
|
if (typeof value === 'string' && example && example.constructor.name === 'RegExp') {
|
|
return value.match(example);
|
|
}
|
|
// not strict equality
|
|
return example == value;
|
|
}
|
|
}
|
|
|
|
function numerically(a, b) {
|
|
return a[this[0]] - b[this[0]];
|
|
}
|
|
|
|
function literally(a, b) {
|
|
return a[this[0]] > b[this[0]];
|
|
}
|
|
|
|
function filtering(res, model, filter, instance) {
|
|
|
|
if(model) {
|
|
if(filter == null) filter = {};
|
|
if(filter.where == null) filter.where = {};
|
|
filter.where.nature = model;
|
|
}
|
|
// do we need some filtration?
|
|
if (filter.where) {
|
|
res = res ? res.filter(applyFilter(filter)) : res;
|
|
}
|
|
|
|
// do we need some sorting?
|
|
if (filter.order) {
|
|
var props = instance[model].properties;
|
|
var allNumeric = true;
|
|
var orders = filter.order;
|
|
var reverse = false;
|
|
if (typeof filter.order === "string") {
|
|
orders = [filter.order];
|
|
}
|
|
|
|
orders.forEach(function (key, i) {
|
|
var m = key.match(/\s+(A|DE)SC$/i);
|
|
if (m) {
|
|
key = key.replace(/\s+(A|DE)SC/i, '');
|
|
if (m[1] === 'DE') reverse = true;
|
|
}
|
|
orders[i] = key;
|
|
if (props[key].type.name !== 'Number') {
|
|
allNumeric = false;
|
|
}
|
|
});
|
|
if (allNumeric) {
|
|
res = res.sort(numerically.bind(orders));
|
|
} else {
|
|
res = res.sort(literally.bind(orders));
|
|
}
|
|
if (reverse) res = res.reverse();
|
|
}
|
|
return res;
|
|
}
|
|
|
|
/**
|
|
* Connection/Disconnection
|
|
*/
|
|
exports.initialize = function(schema, callback) {
|
|
if (!cradle) return;
|
|
|
|
if (!schema.settings.url) {
|
|
var host = schema.settings.host || 'localhost';
|
|
var port = schema.settings.port || '5984';
|
|
var options = schema.settings.options || {
|
|
cache: true,
|
|
raw: false
|
|
};
|
|
if (schema.settings.username) {
|
|
options.auth = {};
|
|
options.auth.username = schema.settings.username;
|
|
if (schema.settings.password) {
|
|
options.auth.password = schema.settings.password;
|
|
}
|
|
}
|
|
var database = schema.settings.database || 'jugglingdb';
|
|
|
|
schema.settings.host = host;
|
|
schema.settings.port = port;
|
|
schema.settings.database = database;
|
|
schema.settings.options = options;
|
|
}
|
|
schema.client = new(cradle.Connection)(schema.settings.host, schema.settings.port,schema.settings.options).database(schema.settings.database);
|
|
|
|
createdbif(
|
|
schema.client,
|
|
errorHandler(callback, function() {
|
|
schema.adapter = new CradleAdapter(schema.client);
|
|
process.nextTick(callback);
|
|
}));
|
|
};
|
|
|
|
CradleAdapter.prototype.disconnect = function() {
|
|
};
|
|
|
|
/**
|
|
* Write methods
|
|
*/
|
|
CradleAdapter.prototype.define = function(descr) {
|
|
this._models[descr.model.modelName] = descr;
|
|
};
|
|
|
|
CradleAdapter.prototype.create = function(model, data, callback) {
|
|
this.client.save(
|
|
stringify(data.id),
|
|
naturalize(data, model),
|
|
errorHandler(callback, function(res, cb) {
|
|
cb(res.id);
|
|
})
|
|
);
|
|
};
|
|
|
|
CradleAdapter.prototype.save = function(model, data, callback) {
|
|
this.client.save(
|
|
stringify(data.id),
|
|
naturalize(data, model),
|
|
errorHandler(callback)
|
|
)
|
|
};
|
|
|
|
CradleAdapter.prototype.updateAttributes = function(model, id, data, callback) {
|
|
this.client.merge(
|
|
stringify(id),
|
|
data,
|
|
errorHandler(callback, function(doc, cb) {
|
|
cb(idealize(doc));
|
|
})
|
|
);
|
|
};
|
|
|
|
CradleAdapter.prototype.updateOrCreate = function(model, data, callback) {
|
|
this.client.get(
|
|
stringify(data.id),
|
|
function (err, doc) {
|
|
if(err) {
|
|
this.create(model, data, callback);
|
|
} else {
|
|
this.updateAttributes(mode, data.id, data, callback);
|
|
}
|
|
}.bind(this)
|
|
)
|
|
};
|
|
|
|
/**
|
|
* Read methods
|
|
*/
|
|
CradleAdapter.prototype.exists = function(model, id, callback) {
|
|
this.client.get(
|
|
stringify(id),
|
|
errorHandler(callback, function(doc, cb) {
|
|
cb(!!doc);
|
|
})
|
|
);
|
|
};
|
|
|
|
CradleAdapter.prototype.find = function(model, id, callback) {
|
|
this.client.get(
|
|
stringify(id),
|
|
errorHandler(callback, function(doc, cb) {
|
|
cb(idealize(doc));
|
|
})
|
|
);
|
|
};
|
|
|
|
CradleAdapter.prototype.count = function(model, callback, where) {
|
|
this.models(
|
|
model,
|
|
{where: where},
|
|
callback,
|
|
function(docs, cb) {
|
|
cb(docs.length);
|
|
}
|
|
);
|
|
};
|
|
|
|
CradleAdapter.prototype.models = function(model, filter, callback, func) {
|
|
this.client.all(
|
|
{include_docs: true},
|
|
errorHandler(callback, function(res, cb) {
|
|
var docs = res.map(function(doc) {
|
|
return idealize(doc);
|
|
});
|
|
var filtered = filtering(docs, model, filter, this._models)
|
|
|
|
func ? func(filtered, cb) : cb(filtered);
|
|
}.bind(this))
|
|
);
|
|
};
|
|
|
|
CradleAdapter.prototype.all = function(model, filter, callback) {
|
|
this.models(
|
|
model,
|
|
filter,
|
|
callback
|
|
);
|
|
};
|
|
|
|
/**
|
|
* Detroy methods
|
|
*/
|
|
CradleAdapter.prototype.destroy = function(model, id, callback) {
|
|
this.client.remove(
|
|
stringify(id),
|
|
function (err, doc) {
|
|
callback(err);
|
|
}
|
|
);
|
|
};
|
|
|
|
CradleAdapter.prototype.destroyAll = function(model, callback) {
|
|
this.models(
|
|
model,
|
|
null,
|
|
callback,
|
|
function(docs, cb) {
|
|
var docIds = docs.map(function(doc) {
|
|
return doc.id;
|
|
});
|
|
this.client.get(docIds, function(err, res) {
|
|
if(err) cb(err);
|
|
|
|
var funcs = res.map(function(doc) {
|
|
return this.client.remove.bind(this.client);
|
|
}.bind(this));
|
|
|
|
var args = res.map(function(doc) {
|
|
return [doc._id, doc._rev];
|
|
});
|
|
|
|
synchronize(funcs, args, cb);
|
|
}.bind(this));
|
|
}.bind(this)
|
|
);
|
|
};
|