Flux pattern for data handling
Simple dispatcher
var Dispatcher = function () {
return {
_stores: [],
register: function (store) {
this._stores.push({store: store});
},
dispatch: function (action) {
if (this._stores.length > 0) {
this._stores.forEach(function (entry) {
entry.store.update(action);
});
}
}
}
};
We expect the store to have an update method(), so let's modify register to expect it.
function register(store) {
if (!store || !store.update || typeof store.update !== 'function') {
throw new Error('You should provide a store that has an update method');
} else {
this._stores.push({store: store});
}
}
Full blown Dispatcher
var Dispatcher = function () {
return {
_stores: [],
register: function (store) {
if (!store || !store.update) {
throw new Error('You should provide a store that has an `update` method.');
} else {
var consumers = [];
var change = function () {
consumers.forEach(function (l) {
l(store);
});
};
var subscribe = function (consumer, noInit) {
consumers.push(consumer);
!noInit ? consumer(store) : null;
};
this._stores.push({store: store, change: change});
return subscribe;
}
},
dispatch: function (action) {
if (this._stores.length > 0) {
this._stores.forEach(function (entry) {
entry.store.update(action, entry.change);
});
}
}
}
};
module.exports = {
create: function () {
var dispatcher = Dispatcher();
return {
createAction: function (type) {
if (!type) {
throw new Error('Please, provide action\'s type.');
} else {
return function (payload) {
return dispatcher.dispatch({type: type, payload: payload});
}
}
},
createSubscriber: function (store) {
return dispatcher.register(store);
}
}
}
};