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ActiveRecord.m
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ActiveRecord.m
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//
// ActiveRecord.m
// PaperPlate
//
// Created by Scot Lawrie on 10/25/12.
// Copyright (c) 2012 Scot Lawrie. All rights reserved.
//
#import "ActiveRecord.h"
#import "AppDelegate.h"
@implementation ActiveRecord
static NSManagedObjectContext *moc = nil;
static NSString *root_url = @"http://localhost/paperplate2/";
+(void)initialize
{
if(!moc)
{
moc = [(AppDelegate *)[[UIApplication sharedApplication] delegate] managedObjectContext];
}
}
+(id)getWhere:(NSDictionary *)conditions
{
NSArray *raw = [self sendRequestWithConditions:conditions];
NSDictionary *results = [raw objectAtIndex:0];
id object = [NSEntityDescription insertNewObjectForEntityForName:NSStringFromClass([self class]) inManagedObjectContext:moc];
return [self mapDictionary:results toObject:object];
}
+(id)sendRequestWithConditions:(NSDictionary *)conditions
{
NSString *tableName = [self valueForKey:@"tableName"];
NSString *credentials = [self getCredentials];
NSString *queryString = [[NSString alloc] init];
NSString *url;
if([conditions count]>0)
{
for(NSString *key in conditions)
{
queryString = [NSString stringWithFormat:@"%@&%@=%@", queryString, key, [conditions objectForKey:key]];
}
url = [NSString stringWithFormat:@"%@%@?%@%@", root_url, tableName, credentials, queryString];
}
else
{
url = [NSString stringWithFormat:@"%@%@?%@", root_url, tableName, credentials];
}
NSURLRequest *request = [NSURLRequest requestWithURL:[NSURL URLWithString:url]];
NSData *response = [NSURLConnection sendSynchronousRequest:request returningResponse:nil error:nil];
return [NSJSONSerialization JSONObjectWithData: response options: NSJSONReadingMutableContainers error: nil];
}
+(id)getByID:(int)userID
{
NSString *stringUid = [NSString stringWithFormat:@"%d", userID];
NSDictionary *conditions = [NSDictionary dictionaryWithObjectsAndKeys:@"id", stringUid, nil];
id newObject = [self getWhere:conditions];
return newObject;
}
+(NSMutableArray *)getAllWhere:(NSDictionary *)conditions
{
NSArray *results = [self sendRequestWithConditions:conditions];
NSMutableArray *objects = [[NSMutableArray alloc] init];
for(NSDictionary *dict in results)
{
id object = [NSEntityDescription insertNewObjectForEntityForName:NSStringFromClass([self class]) inManagedObjectContext:moc];
object = [self mapDictionary:dict toObject:object];
[objects addObject:object];
}
return objects;
}
+(NSMutableArray *)getAll
{
return [self getAllWhere:[[NSDictionary alloc] init]];
}
+(id)create:(NSDictionary *)conditions
{
NSString *tableName = [self valueForKey:@"tableName"];
NSString *credentials = [self getCredentials];
NSString *queryString = [[NSString alloc] init];
NSString *url;
if([conditions count]>0)
{
for(NSString *key in conditions)
{
queryString = [NSString stringWithFormat:@"%@&%@=%@", queryString, key, [conditions objectForKey:key]];
}
url = [NSString stringWithFormat:@"%@%@/create?%@%@", root_url, tableName, credentials, queryString];
}
else
{
url = [NSString stringWithFormat:@"%@%@/create?%@", root_url, tableName, credentials];
}
NSURLRequest *request = [NSURLRequest requestWithURL:[NSURL URLWithString:url]];
NSData *response = [NSURLConnection sendSynchronousRequest:request returningResponse:nil error:nil];
NSDictionary *results = [NSJSONSerialization JSONObjectWithData: response options: NSJSONReadingMutableContainers error: nil];
if([[results objectForKey:@"success"] isEqualToString:@"true"])
{
id object = [NSEntityDescription insertNewObjectForEntityForName:NSStringFromClass([self class]) inManagedObjectContext:moc];
NSDictionary *objectDict = [results objectForKey:@"Object"];
return [self mapDictionary:objectDict toObject:object];
}
else
{
UIAlertView *alert = [[UIAlertView alloc] initWithTitle:[NSString stringWithFormat:@"Error Creating Object in %@",tableName] message:[results objectForKey:@"reason"] delegate:self cancelButtonTitle:@"OK" otherButtonTitles:nil];
[alert show];
return false;
}
}
+(id)mapDictionary:(NSDictionary *)dict toObject:(id)object
{
for(NSString *field in dict)
{
NSString *setterStr = [NSString stringWithFormat:@"set%@%@:",
[[field substringToIndex:1] capitalizedString],
[field substringFromIndex:1]];
if ([object respondsToSelector:NSSelectorFromString(setterStr)])
{
[object setValue:[dict objectForKey:field] forKey:field];
}
}
return object;
}
+(NSString *)getCredentials
{
return [NSString stringWithFormat:@"uid=%@&handle=%@",[[NSUserDefaults standardUserDefaults] stringForKey:@"uid"], [[NSUserDefaults standardUserDefaults] stringForKey:@"handle"]];
}
@end