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//
// FirestackDatabase.m
// Firestack
//
// Created by Ari Lerner on 8/23/16.
// Copyright © 2016 Facebook. All rights reserved.
//
#import "FirestackDatabase.h"
#import "FirestackEvents.h"
@import FirebaseDatabase;
@implementation FirestackDatabase
RCT_EXPORT_MODULE(FirestackDatabase);
RCT_EXPORT_METHOD(set:(NSString *) path
value:(NSDictionary *)value
callback:(RCTResponseSenderBlock) callback)
{
FIRDatabaseReference *ref = [self getRefAtPath:path];
[ref setValue:value withCompletionBlock:^(NSError * _Nullable error, FIRDatabaseReference * _Nonnull ref) {
if (error != nil) {
// Error handling
NSDictionary *evt = [self getAndSendDatabaseError:error];
callback(@[evt]);
} else {
callback(@[[NSNull null], @{
@"result": @"success"
}]);
}
}];
}
RCT_EXPORT_METHOD(update:(NSString *) path
value:(NSDictionary *)value
callback:(RCTResponseSenderBlock) callback)
{
FIRDatabaseReference *ref = [self getRefAtPath:path];
[ref updateChildValues:value withCompletionBlock:^(NSError * _Nullable error, FIRDatabaseReference * _Nonnull ref) {
if (error != nil) {
// Error handling
NSDictionary *evt = [self getAndSendDatabaseError:error];
callback(@[evt]);
} else {
callback(@[[NSNull null], @{
@"result": @"success"
}]);
}
}];
}
RCT_EXPORT_METHOD(remove:(NSString *) path
callback:(RCTResponseSenderBlock) callback)
{
FIRDatabaseReference *ref = [self getRefAtPath:path];
[ref removeValueWithCompletionBlock:^(NSError * _Nullable error, FIRDatabaseReference * _Nonnull ref) {
if (error != nil) {
// Error handling
NSDictionary *evt = [self getAndSendDatabaseError:error];
callback(@[evt]);
} else {
callback(@[[NSNull null], @{
@"result": @"success"
}]);
}
}];
}
RCT_EXPORT_METHOD(on:(NSString *) path
name:(NSString *) name
callback:(RCTResponseSenderBlock) callback)
{
int eventType = [self eventTypeFromName:name];
NSLog(@"Calling observeEventType: at path: %@ %@", path, name);
FIRDatabaseReference *ref = [self getRefAtPath:path];
FIRDatabaseHandle handle = [ref observeEventType:eventType
withBlock:^(FIRDataSnapshot * _Nonnull snapshot) {
NSDictionary *props =
[self snapshotToDict:snapshot];
[self
sendJSEvent:name
props: @{
@"eventName": name,
@"snapshot": props
}];
}
withCancelBlock:^(NSError * _Nonnull error) {
NSLog(@"Error onDBEvent: %@", [error debugDescription]);
[self getAndSendDatabaseError:error];
}];
NSString *idx = [self storeDBHandle:handle];
callback(@[[NSNull null], @{
@"result": @"success",
@"handle": idx
}]);
}
RCT_EXPORT_METHOD(onOnce:(NSString *) path
name:(NSString *) name
callback:(RCTResponseSenderBlock) callback)
{
int eventType = [self eventTypeFromName:name];
FIRDatabaseReference *ref = [self getRefAtPath:path];
[ref observeSingleEventOfType:eventType
withBlock:^(FIRDataSnapshot * _Nonnull snapshot) {
callback(@[[NSNull null], [self snapshotToDict:snapshot]]);
}
withCancelBlock:^(NSError * _Nonnull error) {
NSLog(@"Error onDBEventOnce: %@", [error debugDescription]);
callback(@[@{
@"error": @"onceError",
@"msg": [error debugDescription]
}]);
}];
}
RCT_EXPORT_METHOD(off:(NSString *)path
handleNumber:(NSString *) handleNumber
callback:(RCTResponseSenderBlock) callback)
{
FIRDatabaseReference *ref = [self getRefAtPath:path];
if ([handleNumber isEqualToString:@"-1"]) {
[ref removeAllObservers];
} else {
FIRDatabaseHandle handle = (FIRDatabaseHandle)[[self storedDBHandles] objectForKey:handleNumber];
if (handle) {
[ref removeObserverWithHandle:handle];
[self removeDBHandle:handleNumber];
} else {
[ref removeAllObservers];
}
}
callback(@[[NSNull null], @(true)]);
}
RCT_EXPORT_METHOD(removeListeners:(NSString *) path
callback:(RCTResponseSenderBlock) callback)
{
FIRDatabaseReference *ref = [self getRefAtPath:path];
[ref removeAllObservers];
callback(@[[NSNull null], @(true)]);
}
// Helpers
- (FIRDatabaseReference *) getRef
{
if (self.ref == nil) {
FIRDatabaseReference *rootRef = [[FIRDatabase database] reference];
self.ref = rootRef;
}
return self.ref;
}
- (FIRDatabaseReference *) getRefAtPath:(NSString *) str
{
FIRDatabaseReference *rootRef = [[FIRDatabase database] reference];
return [rootRef child:str];
}
// Handles
- (NSDictionary *) storedDBHandles
{
if (self._DBHandles == nil) {
self._DBHandles = [[NSDictionary alloc] init];
}
return self._DBHandles;
}
- (NSString *) storeDBHandle:(FIRDatabaseHandle) handle
{
NSMutableDictionary *stored = [[self storedDBHandles] mutableCopy];
NSNumber *handleNum = [NSNumber numberWithUnsignedLong:handle];
NSString *strNum = [NSString stringWithFormat:@"%@", handleNum];
if ([stored objectForKey:strNum] == nil) {
[stored setValue:@(handle) forKey:strNum];
self._DBHandles = [stored copy];
}
return strNum;
}
- (void) removeDBHandle:(NSString *) idxStr
{
NSMutableDictionary *stored = [[self storedDBHandles] mutableCopy];
if ([stored objectForKey:idxStr]) {
[stored removeObjectForKey:idxStr];
self._DBHandles = [stored copy];
}
}
- (NSDictionary *) snapshotToDict:(FIRDataSnapshot *) snapshot
{
NSMutableDictionary *dict = [[NSMutableDictionary alloc] init];
[dict setValue:snapshot.key forKey:@"key"];
NSDictionary *val = snapshot.value;
[dict setObject:val forKey:@"value"];
[dict setValue:@(snapshot.hasChildren) forKey:@"hasChildren"];
[dict setValue:@(snapshot.exists) forKey:@"exists"];
[dict setValue:@(snapshot.childrenCount) forKey:@"childrenCount"];
[dict setValue:snapshot.priority forKey:@"priority"];
return dict;
}
- (int) eventTypeFromName:(NSString *)name
{
int eventType = FIRDataEventTypeValue;
if ([name isEqualToString:DATABASE_VALUE_EVENT]) {
eventType = FIRDataEventTypeValue;
} else if ([name isEqualToString:DATABASE_CHILD_ADDED_EVENT]) {
eventType = FIRDataEventTypeChildAdded;
} else if ([name isEqualToString:DATABASE_CHILD_MODIFIED_EVENT]) {
eventType = FIRDataEventTypeChildChanged;
} else if ([name isEqualToString:DATABASE_CHILD_REMOVED_EVENT]) {
eventType = FIRDataEventTypeChildRemoved;
} else if ([name isEqualToString:DATABASE_CHILD_MOVED_EVENT]) {
eventType = FIRDataEventTypeChildMoved;
}
return eventType;
}
- (NSDictionary *) getAndSendDatabaseError:(NSError *) error
{
NSDictionary *evt = @{
@"eventName": DATABASE_ERROR_EVENT,
@"msg": [error debugDescription]
};
[self
sendJSEvent:DATABASE_ERROR_EVENT
props: evt];
return evt;
}
// Not sure how to get away from this... yet
- (NSArray<NSString *> *)supportedEvents {
return @[
DATABASE_VALUE_EVENT,
DATABASE_CHILD_ADDED_EVENT,
DATABASE_CHILD_MODIFIED_EVENT,
DATABASE_CHILD_MOVED_EVENT,
DATABASE_CHILD_REMOVED_EVENT,
DATABASE_ERROR_EVENT
];
}
- (void) sendJSEvent:(NSString *)title
props:(NSDictionary *)props
{
@try {
[self sendEventWithName:title
body:props];
}
@catch (NSException *err) {
NSLog(@"An error occurred in sendJSEvent: %@", [err debugDescription]);
}
}
@end