export function FirebaseObjectFactory(ref, { preserveSnapshot } = {}) {
const objectObservable = new FirebaseObjectObservable((obs) => {
let fn = ref.on('value', (snapshot) => {
obs.next(preserveSnapshot ? snapshot : utils.unwrapMapFn(snapshot));
}, err => {
if (err) {
obs.error(err);
obs.complete();
}
});
return () => ref.off('value', fn);
}, ref);
return observeOn.call(objectObservable, new FirebaseZoneScheduler(new NgZone({}), {}));
}
function firebaseListObservable(ref, _a) {
var preserveSnapshot = (_a === void 0 ? {} : _a).preserveSnapshot;
var toValue = preserveSnapshot ? (function (snapshot) { return snapshot; }) : utils.unwrapMapFn;
var toKey = preserveSnapshot ? (function (value) { return value.key; }) : (function (value) { return value.$key; });
var listObs = new FirebaseListObservable(ref, function (obs) {
var handles = [];
var hasLoaded = false;
var lastLoadedKey = (null);
var array = [];
ref.once('value', function (snap) {
if (snap.exists()) {
snap.forEach(function (child) {
lastLoadedKey = child.key;
});
if (array.find(function (child) { return toKey(child) === lastLoadedKey; })) {
hasLoaded = true;
obs.next(array);
}
}
else {
hasLoaded = true;
obs.next(array);
}
}, function (err) {
if (err) {
obs.error(err);
obs.complete();
}
});
var addFn = ref.on('child_added', function (child, prevKey) {
array = onChildAdded(array, toValue(child), toKey, prevKey);
if (hasLoaded) {
obs.next(array);
}
else if (child.key === lastLoadedKey) {
hasLoaded = true;
obs.next(array);
}
}, function (err) {
if (err) {
obs.error(err);
obs.complete();
}
});
handles.push({ event: 'child_added', handle: addFn });
var remFn = ref.on('child_removed', function (child) {
array = onChildRemoved(array, toValue(child), toKey);
if (hasLoaded) {
obs.next(array);
}
}, function (err) {
if (err) {
obs.error(err);
obs.complete();
}
});
handles.push({ event: 'child_removed', handle: remFn });
var chgFn = ref.on('child_changed', function (child, prevKey) {
array = onChildChanged(array, toValue(child), toKey, prevKey);
if (hasLoaded) {
obs.next(array);
}
}, function (err) {
if (err) {
obs.error(err);
obs.complete();
}
});
handles.push({ event: 'child_changed', handle: chgFn });
return function () {
handles.forEach(function (item) {
ref.off(item.event, item.handle);
});
};
});
return observeOn.call(listObs, new FirebaseZoneScheduler(new NgZone({}), {}));
}
function firebaseListObservable(ref, { preserveSnapshot } = {}) {
const toValue = preserveSnapshot ? (snapshot => snapshot) : utils.unwrapMapFn;
const toKey = preserveSnapshot ? (value => value.key) : (value => value.$key);
const listObs = new FirebaseListObservable(ref, (obs) => {
const handles = [];
let hasLoaded = false;
let lastLoadedKey = (null);
let array = [];
ref.once('value', (snap) => {
if (snap.exists()) {
snap.forEach((child) => {
lastLoadedKey = child.key;
});
if (array.find((child) => toKey(child) === lastLoadedKey)) {
hasLoaded = true;
obs.next(array);
}
}
else {
hasLoaded = true;
obs.next(array);
}
}, err => {
if (err) {
obs.error(err);
obs.complete();
}
});
const addFn = ref.on('child_added', (child, prevKey) => {
array = onChildAdded(array, toValue(child), toKey, prevKey);
if (hasLoaded) {
obs.next(array);
}
else if (child.key === lastLoadedKey) {
hasLoaded = true;
obs.next(array);
}
}, err => {
if (err) {
obs.error(err);
obs.complete();
}
});
handles.push({ event: 'child_added', handle: addFn });
let remFn = ref.on('child_removed', (child) => {
array = onChildRemoved(array, toValue(child), toKey);
if (hasLoaded) {
obs.next(array);
}
}, err => {
if (err) {
obs.error(err);
obs.complete();
}
});
handles.push({ event: 'child_removed', handle: remFn });
let chgFn = ref.on('child_changed', (child, prevKey) => {
array = onChildChanged(array, toValue(child), toKey, prevKey);
if (hasLoaded) {
obs.next(array);
}
}, err => {
if (err) {
obs.error(err);
obs.complete();
}
});
handles.push({ event: 'child_changed', handle: chgFn });
return () => {
handles.forEach(item => {
ref.off(item.event, item.handle);
});
};
});
return observeOn.call(listObs, new FirebaseZoneScheduler(new NgZone({}), {}));
}