Jason Whitehorn jwhitehorn

jwhitehorn / Sync.m

Created January 13, 2018 03:40

	@interface Sync()

	@property (nonatomic) dispatch_queue_t syncQueue;

	@end

	@implementation Sync

	@synthesize syncQueue;

jwhitehorn / Sync.m

Created January 12, 2018 05:30

dispatch_async(dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_DEFAULT, 0), ^{

jwhitehorn / Sync.m

Created January 4, 2018 04:15

	NSMutableURLRequest *request = [[NSMutableURLRequest alloc] init];
	[request setHTTPMethod:@"GET"];
	NSString *url = @"http://localhost:5000/api/updates/";
	if(checksum){
	url = [NSString stringWithFormat:@"%@?checksum=%@", url, checksum];
	}
	[request setURL:[NSURL URLWithString:url]];

	[[[NSURLSession sharedSession] dataTaskWithRequest:request completionHandler:^(NSData data, NSURLResponse response, NSError *err) {
	NSInteger statusCode = [(NSHTTPURLResponse *)response statusCode];

jwhitehorn / Sync.m

Last active January 4, 2018 04:11

	NSArray *documentPaths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
	NSString *documentsDirectoryPath = [documentPaths objectAtIndex:0];

	NSString *checksum = nil;
	BOOL initialSync = YES;
	if([this isUpdatePending]){
	NSString *filePath = [documentsDirectoryPath stringByAppendingPathComponent:@"updated.db"];
	NSData *contents = [NSData dataWithContentsOfFile:filePath];
	checksum = [contents MD5HexDigest];
	initialSync = NO;

jwhitehorn / Sync.m

Created January 1, 2018 23:00

	- (void) applyOutstandingUpdates {
	__weak id this = self;
	dispatch_async(dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_DEFAULT, 0), ^{
	if(![this isUpdatePending]){
	return; //no update pending
	}

	NSArray *documentPaths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
	NSString *documentsDirectoryPath = [documentPaths objectAtIndex:0];

jwhitehorn / Sync.m

Created January 1, 2018 20:53

	- (BOOL) isUpdatePending {
	NSArray *documentPaths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
	NSString *documentsDirectoryPath = [documentPaths objectAtIndex:0];

	NSString *filePath = [documentsDirectoryPath stringByAppendingPathComponent:@"updated.db"];

	NSFileManager *fileManager = [NSFileManager defaultManager];
	return [fileManager fileExistsAtPath:filePath];
	}

jwhitehorn / Sync.m

Last active January 4, 2018 04:12

	#import "Sync.h"
	#import "NSData+MD5Digest.h"

	@implementation Sync

	+ (Sync *) defaultWorker {
	//GCD singleton pattern: http://www.galloway.me.uk/tutorials/singleton-classes/
	static Sync *defaultWorker = nil;
	static dispatch_once_t onceToken;
	dispatch_once(&onceToken, ^{

jwhitehorn / Sync.h

Last active January 1, 2018 15:03

	#import <Foundation/Foundation.h>

	@interface Sync : NSObject

	+ (Sync *) defaultWorker;

	- (void) downloadUpdates;
	- (void) applyOutstandingUpdates;
	- (BOOL) isUpdatePending;
	- (BOOL) hasPerformedInitialSync;

jwhitehorn / api.js

Last active December 25, 2017 20:13

	//...

	app.get('/api/updates/:model', function (req, res) {
	var filter = {};
	if(req.query.timestamp){
	filter['updated_at'] = onionrm.gte(req.query.timestamp);
	}

	//...

jwhitehorn / api_result.json

Last active February 6, 2018 13:46

	[{
	"id": 1,
	"name": "Oaklake Trails Naturist Park",
	"latitude": 35.8082099,
	"longitude": -96.5649402,
	"rating": 4,
	"address": "24601 Milfay Rd",
	"city": "Depew",
	"state": "OK",
	"zip_code": "74028",