return function(method, model, options) {
options = merge.defaults({}, options, defaults, gdef, { database: db });
return Lazybones.sync.call(this, method, model, options);
}
Lazybones.sync = function(method, model, options) {
var self, dbMethod, db, onChange, promise, chgopts, chgfilter, processed, processPromise;
// resolve method and database
self = this;
options = merge.defaults({}, options, getSyncOptions(model), getSyncOptions(model.collection), Lazybones.defaults);
method = method.toLowerCase().trim();
db = getDatabase(options) || getDatabase(model);
if (db == null) throw new Error("Missing PouchDB database.");
// deal with writes
if (method !== "read") {
promise = db[methodMap[method]](model.toJSON(), options.options[methodMap[method]]);
}
// deal with normal reads
else if (!options.changes) {
promise = options.fetch.call(self, model, db, options);
if (promise == null || typeof promise.then !== "function") {
promise = Promise.resolve(promise);
}
}
// deal with changes feed reads
else {
chgopts = merge.defaults({
include_docs: true
}, options.changes, options.options.changes);
if (typeof chgopts.filter === "function") {
chgfilter = chgopts.filter;
chgopts.filter = null;
}
promise = db.changes(chgopts);
onChange = function(row) {
var val = options.process.call(self, row, method, model, options);
if (chgfilter && !chgfilter(val, row, options)) return;
model.set(val, merge.extend({ remove: false }, options));
}
promise.on("create", onChange);
promise.on("update", onChange);
promise.on("delete", function(row) {
var m = !isCollection(model) ? model : model.remove(row.id, options);
if (m) {
var val = options.process.call(self, row, method, model, options);
m.set(val, options);
}
});
// return the changes object immediately
return promise;
}
// trigger the request event
model.trigger('request', model, db, options);
// process the result into something that backbone can use
// and ship result to success and error callbacks
return promise.then(function(res) {
options.success(options.process.call(self, res, method, model, options));
return res;
}).catch(function(err) {
options.error(err);
throw err;
});
}