first commit

2026-03-25 09:05:52 +00:00 · 2011-09-03 23:39:23 -07:00 · 2011-09-03 23:39:23 -07:00 · 157b0a1666
commit 157b0a1666
11 changed files with 895 additions and 0 deletions
--- a/.gitignore
+++ b/.gitignore
@ -0,0 +1 @@
+xcuserdata
--- a/Marshmallows.xcodeproj/project.pbxproj
+++ b/Marshmallows.xcodeproj/project.pbxproj
@ -0,0 +1,278 @@
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+			);
+			name = Products;
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+			isa = PBXGroup;
+			children = (
+				7BE32D0914132EE4008F2DEA /* Foundation.framework */,
+			);
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+			isa = PBXGroup;
+			children = (
+				7BE32D0E14132EE4008F2DEA /* Marshmallows.h */,
+				7BD100A0141341EB00A9921B /* MMHTTPClient.h */,
+				7BD100A1141341EB00A9921B /* MMHTTPClient.m */,
+				7BD100A414134FBE00A9921B /* MMHTTPRequest.h */,
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+				7BE32D6914133618008F2DEA /* NSString+sanity.m */,
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+			);
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+		};
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+			isa = PBXGroup;
+			children = (
+				7BE32D0D14132EE4008F2DEA /* Marshmallows-Prefix.pch */,
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+				7BE32D0214132EE4008F2DEA /* Sources */,
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+				7BE32D0414132EE4008F2DEA /* Headers */,
+			);
+			buildRules = (
+			);
+			dependencies = (
+			);
+			name = Marshmallows;
+			productName = Marshmallows;
+			productReference = 7BE32D0614132EE4008F2DEA /* libMarshmallows.a */;
+			productType = "com.apple.product-type.library.static";
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+/* End PBXNativeTarget section */
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+/* Begin PBXProject section */
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+			isa = PBXProject;
+			attributes = {
+				ORGANIZATIONNAME = "Guru Logic";
+			};
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+			compatibilityVersion = "Xcode 3.2";
+			developmentRegion = English;
+			hasScannedForEncodings = 0;
+			knownRegions = (
+				en,
+			);
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+				7BE32D0514132EE4008F2DEA /* Marshmallows */,
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+				7BD1009E1413375B00A9921B /* RegexKitLite.m in Sources */,
+				7BD100A3141341EB00A9921B /* MMHTTPClient.m in Sources */,
+				7BD100A714134FBE00A9921B /* MMHTTPRequest.m in Sources */,
+				7BD100AB141353B700A9921B /* NSDate+relative.m in Sources */,
+			);
+			runOnlyForDeploymentPostprocessing = 0;
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+/* End PBXSourcesBuildPhase section */
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+/* Begin XCBuildConfiguration section */
+		7BE32D1114132EE4008F2DEA /* Debug */ = {
+			isa = XCBuildConfiguration;
+			buildSettings = {
+				ALWAYS_SEARCH_USER_PATHS = NO;
+				ARCHS = "$(ARCHS_STANDARD_32_BIT)";
+				COPY_PHASE_STRIP = NO;
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+				GCC_WARN_ABOUT_MISSING_PROTOTYPES = YES;
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+				IPHONEOS_DEPLOYMENT_TARGET = 4.3;
+				SDKROOT = iphoneos;
+			};
+			name = Debug;
+		};
+		7BE32D1214132EE4008F2DEA /* Release */ = {
+			isa = XCBuildConfiguration;
+			buildSettings = {
+				ALWAYS_SEARCH_USER_PATHS = NO;
+				ARCHS = "$(ARCHS_STANDARD_32_BIT)";
+				COPY_PHASE_STRIP = YES;
+				GCC_C_LANGUAGE_STANDARD = gnu99;
+				GCC_VERSION = com.apple.compilers.llvmgcc42;
+				GCC_WARN_ABOUT_MISSING_PROTOTYPES = YES;
+				GCC_WARN_ABOUT_RETURN_TYPE = YES;
+				GCC_WARN_UNUSED_VARIABLE = YES;
+				IPHONEOS_DEPLOYMENT_TARGET = 4.3;
+				SDKROOT = iphoneos;
+				VALIDATE_PRODUCT = YES;
+			};
+			name = Release;
+		};
+		7BE32D1414132EE4008F2DEA /* Debug */ = {
+			isa = XCBuildConfiguration;
+			buildSettings = {
+				DSTROOT = /tmp/Marshmallows.dst;
+				GCC_PRECOMPILE_PREFIX_HEADER = YES;
+				GCC_PREFIX_HEADER = "Marshmallows/Marshmallows-Prefix.pch";
+				GCC_WARN_ABOUT_MISSING_PROTOTYPES = NO;
+				OTHER_LDFLAGS = "-ObjC";
+				PRODUCT_NAME = "$(TARGET_NAME)";
+				SKIP_INSTALL = YES;
+			};
+			name = Debug;
+		};
+		7BE32D1514132EE4008F2DEA /* Release */ = {
+			isa = XCBuildConfiguration;
+			buildSettings = {
+				DSTROOT = /tmp/Marshmallows.dst;
+				GCC_PRECOMPILE_PREFIX_HEADER = YES;
+				GCC_PREFIX_HEADER = "Marshmallows/Marshmallows-Prefix.pch";
+				GCC_WARN_ABOUT_MISSING_PROTOTYPES = NO;
+				OTHER_LDFLAGS = "-ObjC";
+				PRODUCT_NAME = "$(TARGET_NAME)";
+				SKIP_INSTALL = YES;
+			};
+			name = Release;
+		};
+/* End XCBuildConfiguration section */
+
+/* Begin XCConfigurationList section */
+		7BE32D0014132EE3008F2DEA /* Build configuration list for PBXProject "Marshmallows" */ = {
+			isa = XCConfigurationList;
+			buildConfigurations = (
+				7BE32D1114132EE4008F2DEA /* Debug */,
+				7BE32D1214132EE4008F2DEA /* Release */,
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+			defaultConfigurationIsVisible = 0;
+			defaultConfigurationName = Release;
+		};
+		7BE32D1314132EE4008F2DEA /* Build configuration list for PBXNativeTarget "Marshmallows" */ = {
+			isa = XCConfigurationList;
+			buildConfigurations = (
+				7BE32D1414132EE4008F2DEA /* Debug */,
+				7BE32D1514132EE4008F2DEA /* Release */,
+			);
+			defaultConfigurationIsVisible = 0;
+			defaultConfigurationName = Release;
+		};
+/* End XCConfigurationList section */
+	};
+	rootObject = 7BE32CFD14132EE3008F2DEA /* Project object */;
+}
--- a/Marshmallows.xcodeproj/project.xcworkspace/contents.xcworkspacedata
+++ b/Marshmallows.xcodeproj/project.xcworkspace/contents.xcworkspacedata
@ -0,0 +1,7 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<Workspace
+   version = "1.0">
+   <FileRef
+      location = "self:Marshmallows.xcodeproj">
+   </FileRef>
+</Workspace>
--- a/Marshmallows/MMHTTPClient.h
+++ b/Marshmallows/MMHTTPClient.h
@ -0,0 +1,64 @@
+//
+//  MMHTTPClient.h
+//  Marshmallows
+//
+//  Created by Sami Samhuri on 11-09-03.
+//  Copyright 2011 Guru Logic. All rights reserved.
+//
+
+#import <UIKit/UIImage.h>
+
+#define MMHTTPClientStatusError -1
+#define MMHTTPClientDefaultTimeout 120
+
+typedef void (^MMHTTPClientCallback)(NSInteger status, id data);
+typedef void (^MMHTTPClientTextCallback)(NSInteger status, NSString *text);
+typedef void (^MMHTTPClientImageCallback)(NSInteger status, UIImage *image);
+
+@interface MMHTTPClient : NSObject
+{
+    NSMutableDictionary *_callbacks;
+    NSMutableDictionary *_connections;
+    NSMutableDictionary *_data;
+    NSMutableDictionary *_headers;
+    NSMutableDictionary *_statusCodes;
+    NSMutableDictionary *_types;
+    NSString *_baseURL;
+    NSUInteger _timeout;
+}
+
+ (MMHTTPClient *) sharedClient;
+ (id) client;
+ (id) clientWithBaseURL: (NSString *)baseURL;
+ (id) clientWithBaseURL: (NSString *)baseURL timeout: (NSUInteger)timeout;
+
+ (NSString *) pathFor: (NSString *)first, ... NS_REQUIRES_NIL_TERMINATION;
+ (NSString *) urlFor: (NSString *)first, ... NS_REQUIRES_NIL_TERMINATION;
+ (NSString *) urlWithPath: (NSString *)path;
+ (void) request: (NSDictionary *)options then: (MMHTTPClientCallback)callback;
+ (void) get: (NSString *)url then: (MMHTTPClientCallback)callback;
+ (void) getImage: (NSString *)url then: (MMHTTPClientImageCallback)callback;
+ (void) getText: (NSString *)url then: (MMHTTPClientTextCallback)callback;
+ (void) post: (NSString *)url then: (MMHTTPClientCallback)callback;
+ (void) post: (NSString *)url data: (NSData *)data then: (MMHTTPClientCallback)callback;
+ (void) put: (NSString *)url data: (NSData *)data then: (MMHTTPClientCallback)callback;
+ (void) delete: (NSString *)url then: (MMHTTPClientCallback)callback;
+
+@property (nonatomic, retain) NSString *baseURL;
+@property NSUInteger timeout;
+
+- (id) initWithBaseURL: (NSString *)baseURl;
+- (id) initWithBaseURL: (NSString *)baseURl timeout: (NSUInteger)timeout;
+- (NSString *) pathFor: (NSString *)first, ... NS_REQUIRES_NIL_TERMINATION;
+- (NSString *) urlFor: (NSString *)first, ... NS_REQUIRES_NIL_TERMINATION;
+- (NSString *) urlWithPath: (NSString *)path;
+- (void) request: (NSDictionary *)options then: (MMHTTPClientCallback)callback;
+- (void) get: (NSString *)url then: (MMHTTPClientCallback)callback;
+- (void) getImage: (NSString *)url then: (MMHTTPClientImageCallback)callback;
+- (void) getText: (NSString *)url then: (MMHTTPClientTextCallback)callback;
+- (void) post: (NSString *)url then: (MMHTTPClientCallback)callback;
+- (void) post: (NSString *)url data: (NSData *)data then: (MMHTTPClientCallback)callback;
+- (void) put: (NSString *)url data: (NSData *)data then: (MMHTTPClientCallback)callback;
+- (void) delete: (NSString *)url then: (MMHTTPClientCallback)callback;
+
+@end
--- a/Marshmallows/MMHTTPClient.m
+++ b/Marshmallows/MMHTTPClient.m
@ -0,0 +1,355 @@
+//
+//  MMHTTPClient.m
+//  Marshmallows
+//
+//  Created by Sami Samhuri on 11-09-03.
+//  Copyright 2011 Guru Logic. All rights reserved.
+//
+
+#import "MMHTTPClient.h"
+#import "NSString+sanity.h"
+
+MMHTTPClient *_client;
+
+NSString *JoinURLComponents(NSString *first, va_list args)
+{
+    NSMutableString *url = [NSMutableString string];
+    NSString *slash = @"";
+    for (NSString *arg = first; arg != nil; arg = va_arg(args, NSString *)) {
+        [url appendFormat: @"%@%@", slash, [arg stringByURLEncoding]];
+        slash = @"/";
+    }
+    return [NSString stringWithString: url];
+}
+
+@implementation MMHTTPClient
+
+@synthesize baseURL = _baseURL;
+@synthesize timeout = _timeout;
+
+ (MMHTTPClient *) sharedClient
+{
+    if (!_client) {
+        _client = [[self alloc] init];
+    }
+    return _client;
+}
+
+ (id) client
+{
+    return [[[self alloc] init] autorelease];
+}
+
+ (id) clientWithBaseURL: (NSString *)baseURL
+{
+    return [[[self alloc] initWithBaseURL: baseURL] autorelease];
+}
+
+ (id) clientWithBaseURL: (NSString *)baseURL timeout: (NSUInteger)timeout
+{
+    return [[[self alloc] initWithBaseURL: baseURL timeout: timeout] autorelease];
+}
+
+ (NSString *) pathFor: (NSString *)first, ...
+{
+    va_list args;
+    va_start(args, first);
+    NSString *url = JoinURLComponents(first, args);
+    va_end(args);
+    return url;
+}
+
+ (NSString *) urlFor: (NSString *)first, ...
+{
+    va_list args;
+    va_start(args, first);
+    NSString *url = [[[self sharedClient] baseURL] stringByAppendingString: JoinURLComponents(first, args)];
+    va_end(args);
+    return url;
+}
+
+ (NSString *) urlWithPath: (NSString *)path
+{
+    return [[[self sharedClient] baseURL] stringByAppendingPathComponent: path];
+}
+
+ (void) request: (NSDictionary *)options then: (MMHTTPClientCallback)callback
+{
+    [[self sharedClient] request: options then: callback];
+}
+
+ (void) get: (NSString *)url then: (MMHTTPClientCallback)callback
+{
+    [[self sharedClient] get: url then: callback];
+}
+
+ (void) getImage: (NSString *)url then: (MMHTTPClientImageCallback)callback
+{
+    [[self sharedClient] getImage: url then: callback];
+}
+
+ (void) getText: (NSString *)url then: (MMHTTPClientTextCallback)callback
+{
+    [[self sharedClient] getText: url then: callback];
+}
+
+ (void) post: (NSString *)url then: (MMHTTPClientCallback)callback
+{
+    [[self sharedClient] post: url then: callback];
+}
+
+ (void) post: (NSString *)url data: (NSData *)data then: (MMHTTPClientCallback)callback
+{
+    [[self sharedClient] post: url data: data then: callback];
+}
+
+ (void) put: (NSString *)url data: (NSData *)data then: (MMHTTPClientCallback)callback
+{
+    [[self sharedClient] put: url data: data then: callback];
+}
+
+ (void) delete: (NSString *)url then: (MMHTTPClientCallback)callback
+{
+    [[self sharedClient] delete: url then: callback];
+}
+
+- (id) init
+{
+    return [self initWithBaseURL: nil timeout: MMHTTPClientDefaultTimeout];
+}
+
+- (id) initWithBaseURL: (NSString *)baseURL
+{
+    return [self initWithBaseURL: baseURL timeout: MMHTTPClientDefaultTimeout];
+}
+
+- (id) initWithBaseURL: (NSString *)baseURL timeout: (NSUInteger)timeout
+{
+    self = [super init];
+    if (self) {
+        _baseURL = [baseURL copy];
+        _timeout = timeout;
+        _callbacks = [[NSMutableDictionary alloc] init];
+        _connections = [[NSMutableDictionary alloc] init];
+        _data = [[NSMutableDictionary alloc] init];
+        _headers = [[NSMutableDictionary alloc] init];
+        _statusCodes = [[NSMutableDictionary alloc] init];
+        _types = [[NSMutableDictionary alloc] init];
+    }
+    return self;
+}
+
+- (NSString *) pathFor: (NSString *)first, ...
+{
+    va_list args;
+    va_start(args, first);
+    NSString *url = JoinURLComponents(first, args);
+    va_end(args);
+    return url;
+}
+
+- (NSString *) urlFor: (NSString *)first, ...
+{
+    va_list args;
+    va_start(args, first);
+    NSString *url = [_baseURL stringByAppendingString: JoinURLComponents(first, args)];
+    va_end(args);
+    return url;
+}
+
+- (NSString *) urlWithPath: (NSString *)path
+{
+    return [_baseURL stringByAppendingPathComponent: path];
+}
+
+- (void) getImage: (NSString *)url then: (MMHTTPClientImageCallback)callback
+{
+    [self request: [NSDictionary dictionary] then: (MMHTTPClientCallback)callback];
+}
+
+- (void) getText: (NSString *)url then: (MMHTTPClientTextCallback)callback
+{
+    NSDictionary *options = [NSDictionary dictionaryWithObjectsAndKeys:
+                             url,     @"url",
+                             @"text", @"type",
+                             nil];
+    [self request: options then: (MMHTTPClientCallback)callback];
+}
+
+- (void) get: (NSString *)url then: (MMHTTPClientCallback)callback
+{
+    NSDictionary *options = [NSDictionary dictionaryWithObjectsAndKeys:
+                             url,      @"url",
+                             @"image", @"type",
+                             nil];
+    [self request: options then: (MMHTTPClientCallback)callback];
+}
+
+- (void) post: (NSString *)url then: (MMHTTPClientCallback)callback
+{
+    NSDictionary *options = [NSDictionary dictionaryWithObjectsAndKeys:
+                             @"POST", @"method",
+                             url,     @"url",
+                             nil];
+    [self request: options then: callback];
+}
+
+- (void) post: (NSString *)url data: (NSData *)data then: (MMHTTPClientCallback)callback
+{
+    NSDictionary *options = [NSDictionary dictionaryWithObjectsAndKeys:
+                             @"POST", @"method",
+                             url,     @"url",
+                             data,    @"data",
+                             nil];
+    [self request: options then: callback];
+}
+
+- (void) put: (NSString *)url data: (NSData *)data then: (MMHTTPClientCallback)callback
+{
+    NSDictionary *options = [NSDictionary dictionaryWithObjectsAndKeys:
+                             @"PUT",  @"method",
+                             url,     @"url",
+                             data,    @"data",
+                             nil];
+    [self request: options then: callback];
+}
+
+- (void) delete: (NSString *)url then: (MMHTTPClientCallback)callback
+{
+    NSDictionary *options = [NSDictionary dictionaryWithObjectsAndKeys:
+                             @"DELETE", @"method",
+                             url,       @"url",
+                             nil];
+    [self request: options then: callback];
+}
+
+- (void) request: (NSDictionary *)options then: (MMHTTPClientCallback)callback
+{
+    NSString *urlString = [options valueForKey: @"url"];
+    NSString *method = [options valueForKey: @"method"];
+    NSData *data = [options valueForKey: @"data"];
+    NSDictionary *headers = [options valueForKey: @"headers"];
+    NSString *type = [options valueForKey: @"type"];
+    
+    if (!method) method = @"GET";
+    
+    if (![[urlString substringToIndex: 5] isEqualToString: @"http:"]
+        && ![[urlString substringToIndex: 6] isEqualToString: @"https:"])
+    {
+        urlString = [self urlWithPath: urlString];
+    }
+    NSURL *url = [NSURL URLWithString: urlString];
+    
+    NSMutableURLRequest *request = [NSMutableURLRequest requestWithURL: url
+                                                           cachePolicy: NSURLRequestUseProtocolCachePolicy
+                                                       timeoutInterval: self.timeout];
+    [request setHTTPMethod: method];
+    
+    if (data && ([method isEqualToString: @"POST"] || [method isEqualToString: @"PUT"])) {
+        [request setHTTPBody: data];
+    }
+    
+    if (headers) {
+        for (NSString *key in headers) {
+            [request setValue: [headers objectForKey: key] forHTTPHeaderField: key];
+        }
+    }
+    
+    NSURLConnection *connection = [NSURLConnection connectionWithRequest: request delegate: self];
+    NSString *key = [connection description];
+    [_callbacks setObject: [[callback copy] autorelease] forKey: [connection description]];
+    [_connections setObject: connection forKey: key];
+    if (type) [_types setObject: type forKey: key];
+}
+
+
+#pragma mark - NSURLConnection delegate methods
+
+- (void) connection: (NSURLConnection *)connection didReceiveResponse: (NSURLResponse *)response
+{
+    NSString *key = [connection description];
+    NSNumber *status;
+    NSDictionary *headers;
+    
+    if ([response respondsToSelector :@selector(statusCode)])
+    {
+        status = [NSNumber numberWithInt: [(NSHTTPURLResponse *)response statusCode]];
+        headers = [(NSHTTPURLResponse *)response allHeaderFields];
+    }
+    else {
+        NSLog(@"Not an HTTP response? connection: %@ response: %@", connection, response);
+        status = [NSNumber numberWithInt: 500];
+        headers = [NSDictionary dictionary];
+    }
+    
+    [_statusCodes setObject: status forKey: key];
+    [_headers setObject: headers forKey: key];
+    [_data setObject: [[[NSMutableData alloc] init] autorelease] forKey: key];
+}
+
+- (void) connection: (NSURLConnection *)connection didReceiveData: (NSData *)data
+{
+    [[_data objectForKey: [connection description]] appendData: data];
+}
+
+- (void) connection: (NSURLConnection *)connection didFailWithError: (NSError *)error
+{
+    NSString *key = [connection description];
+    MMHTTPClientCallback callback = [_callbacks objectForKey: key];
+    
+    callback(MMHTTPClientStatusError, nil);
+    
+    [_statusCodes removeObjectForKey: key];
+    [_callbacks removeObjectForKey: key];
+    [_data removeObjectForKey: key];
+}
+
+- (void) connectionDidFinishLoading: (NSURLConnection *)connection
+{
+    NSString *key = [connection description];
+    MMHTTPClientCallback callback = [_callbacks objectForKey: key];
+    int status = [[_statusCodes objectForKey: key] intValue];
+    NSString *type = [_types objectForKey: key];
+    id data = nil;
+    if (status == 200) {
+        if ([type isEqualToString: @"text"]) {
+            NSData *rawData = [_data objectForKey: key];
+            data = [[[NSString alloc] initWithBytes: rawData.bytes
+                                             length: rawData.length
+                                           encoding: NSUTF8StringEncoding] autorelease];
+        }
+        else if ([type isEqualToString: @"image"]) {
+            data = [UIImage imageWithData: [_data objectForKey: key]];
+        }
+        else {
+            data = [_data objectForKey: key];
+        }
+    }
+    
+    callback(status, data);
+    
+    [_callbacks removeObjectForKey: key];
+    [_connections removeObjectForKey: key];
+    [_data removeObjectForKey: key];
+    [_headers removeObjectForKey: key];
+    [_statusCodes removeObjectForKey: key];
+    [_types removeObjectForKey: key];
+}
+
+- (void) dealloc
+{
+    for (NSURLConnection *conn in _connections) {
+        [conn cancel];
+    }
+
+    [_baseURL release];
+    [_callbacks release];
+    [_connections release];
+    [_data release];
+    [_headers release];
+    [_statusCodes release];
+    [_types release];
+    [super dealloc];
+}
+
+@end
--- a/Marshmallows/Marshmallows-Prefix.pch
+++ b/Marshmallows/Marshmallows-Prefix.pch
@ -0,0 +1,7 @@
+//
+// Prefix header for all source files of the 'Marshmallows' target in the 'Marshmallows' project
+//
+
+#ifdef __OBJC__
+    #import <Foundation/Foundation.h>
+#endif
--- a/Marshmallows/Marshmallows.h
+++ b/Marshmallows/Marshmallows.h
@ -0,0 +1,12 @@
+//
+//  Marshmallows.h
+//  Marshmallows
+//
+//  Created by Sami Samhuri on 11-09-03.
+//  Copyright 2011 Guru Logic. All rights reserved.
+//
+
+#import <Foundation/Foundation.h>
+
+#import "NSDate+relative.h"
+#import "NSString+sanity.h"
--- a/Marshmallows/NSDate+relative.h
+++ b/Marshmallows/NSDate+relative.h
@ -0,0 +1,16 @@
+//
+//  NSDate+relative.h
+//  UberClassifieds
+//
+//  Created by Sami Samhuri on 11-06-18.
+//  Copyright 2011 Betastreet Media. All rights reserved.
+//
+
+#import <Foundation/Foundation.h>
+
+
+@interface NSDate (NSDate_relative)
+
+- (NSString *) relativeToNow;
+
+@end
--- a/Marshmallows/NSDate+relative.m
+++ b/Marshmallows/NSDate+relative.m
@ -0,0 +1,60 @@
+//
+//  NSDate+relative.m
+//  UberClassifieds
+//
+//  Created by Sami Samhuri on 11-06-18.
+//  Copyright 2011 Betastreet Media. All rights reserved.
+//
+
+#import "NSDate+relative.h"
+
+#define MINUTE 60.0
+#define HOUR   (60.0 * MINUTE)
+#define DAY    (24.0 * HOUR)
+#define WEEK   (7.0 * DAY)
+#define MONTH  (30.0 * DAY)
+
+@implementation NSDate (NSDate_relative)
+
+- (NSString *) relativeToNow
+{
+    double diff = [[NSDate date] timeIntervalSinceDate: self];
+    if (diff < MINUTE) {
+        return @"right now";
+    }
+    else if (diff < 2 * MINUTE) {
+        return @"a minute ago";
+    }
+    else if (diff < HOUR) {
+        return [NSString stringWithFormat: @"%d minutes ago", (int)(diff / MINUTE)];
+    }
+    else if (diff < 2 * HOUR) {
+        return @"an hour ago";
+    }
+    else if (diff < DAY) {
+        return [NSString stringWithFormat: @"%d hours ago", (int)(diff / HOUR)];
+    }
+    else if (diff < 2 * DAY) {
+        return @"yesterday";
+    }
+    else if (diff < WEEK) {
+        return [NSString stringWithFormat: @"%d days ago", (int)(diff / DAY)];
+    }
+    else if (diff < 2 * WEEK) {
+        return @"last week";
+    }
+    else if (diff < 4 * WEEK) {
+        return [NSString stringWithFormat: @"%d weeks ago", (int)(diff / WEEK)];
+    }
+    else if (diff < 8 * WEEK) {
+        return @"last month";
+    }
+    else if (diff < 12 * MONTH) {
+        return [NSString stringWithFormat: @"%d months ago", (int)(diff / MONTH)];
+    }
+    else {
+        return @"a long time ago";
+    }   
+}
+
+@end
--- a/Marshmallows/NSString+sanity.h
+++ b/Marshmallows/NSString+sanity.h
@ -0,0 +1,19 @@
+//
+//  NSString+sanity.h
+//  Marshmallows
+//
+//  Created by Sami Samhuri on 11-09-03.
+//  Copyright 2011 Guru Logic. All rights reserved.
+//
+
+#import <Foundation/Foundation.h>
+
+@interface NSString (NSString_sanity)
+
+- (NSString *) firstMatch: (NSString *)pattern;
+- (NSString *) stringByReplacing: (NSString *)pattern with: (NSString *)replacement;
+- (NSString *) stringByReplacingFirst: (NSString *)pattern with: (NSString *)replacement;
+- (NSString *) stringByTrimmingWhitespace;
+- (NSString *) stringByURLEncoding;
+
+@end
--- a/Marshmallows/NSString+sanity.m
+++ b/Marshmallows/NSString+sanity.m
@ -0,0 +1,76 @@
+//
+//  NSString+sanity.m
+//  Marshmallows
+//
+//  Created by Sami Samhuri on 11-09-03.
+//  Copyright 2011 Guru Logic. All rights reserved.
+//
+
+#import "NSString+sanity.h"
+
+// Encode a string to embed in an URL.
+NSString* URLEncode(NSString *string) {
+    return (NSString *)
+    CFURLCreateStringByAddingPercentEscapes(NULL,
+                                            (CFStringRef) string,
+                                            NULL,
+                                            (CFStringRef) @"!*'();:@&=+$,/?%#[]",
+                                            kCFStringEncodingUTF8);
+}
+
+
+@implementation NSString (NSString_sanity)
+
+- (NSString *) stringByTrimmingWhitespace
+{
+    return [self stringByTrimmingCharactersInSet: [NSCharacterSet whitespaceAndNewlineCharacterSet]];
+}
+
+- (NSString *) firstMatch: (NSString *)pattern
+{
+    NSRegularExpression *regex = [NSRegularExpression
+                                  regularExpressionWithPattern: pattern
+                                  options: 0
+                                  error: NULL];
+    NSRange match = [regex rangeOfFirstMatchInString: self
+                                             options: NSMatchingCompleted
+                                               range: NSMakeRange(0, self.length)];
+    return match.location == NSNotFound ? nil : [self substringWithRange: match];
+}
+
+- (NSString *) stringByReplacing: (NSString *)pattern with: (NSString *)replacement
+{
+    NSRegularExpression *regex = [NSRegularExpression
+                                  regularExpressionWithPattern: pattern
+                                  options: NSRegularExpressionCaseInsensitive
+                                  error: NULL];
+    return [regex stringByReplacingMatchesInString: self
+                                           options: NSMatchingCompleted
+                                             range: NSMakeRange(0, [self length])
+                                      withTemplate: @""];
+}
+
+- (NSString *) stringByReplacingFirst: (NSString *)pattern with: (NSString *)replacement
+{
+    NSRegularExpression *regex = [NSRegularExpression
+                                  regularExpressionWithPattern: pattern
+                                  options: 0
+                                  error: NULL];
+    NSRange match = [regex rangeOfFirstMatchInString: self
+                                             options: NSMatchingCompleted
+                                               range: NSMakeRange(0, self.length)];
+    if (match.location != NSNotFound) {
+        NSString *rest = [self substringFromIndex: match.location + match.length];
+        return [[[self substringToIndex: match.location]
+                 stringByAppendingString: replacement]
+                stringByAppendingString: rest];
+    }
+    return [[self copy] autorelease];
+}
+
+- (NSString *) stringByURLEncoding
+{
+    return URLEncode(self);
+}
+
+@end