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/**
* OKQuery!
* Takes configuration and gives you something that can run a DB query
* based on the configurations.
*/
function OKQuery(db, options) {
if (!(this instanceof OKQuery)) return new OKQuery(db, options);
options = options || {};
if (!db)
throw new Error('No DB provided to query.');
if (!options.type)
throw new Error('No resource type provided to query');
var type = options.type;
var id = options.id || '*';
Object.defineProperty(this, 'type', {
value: type,
writable: false
});
this.get = createQuery(db, type, id);
}
function createQuery(db, type, id) {
if (isDynamic(id)) {
return queryDynamic(db, type);
} else if (isSet(id)) {
return queryAll(db, type);
} else {
return querySingle(db, type, id);
}
}
function queryDynamic(db, type) {
return function(options) {
options = options || {};
return db.get(type, options.id);
}
}
function queryAll(db, type) {
return function() {
return db.getAll(type);
}
}
function querySingle(db, type, id) {
return function() {
return db.get(type, id);
}
}
function isDynamic(id) {
return id && id.charAt(0) === ':';
}
function isSet(id) {
return id && id === '*';
}
module.exports = OKQuery;
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