ตอนที่ 10 : การทำ Validate และ Modify data in Mobile Services บน iOS / iPhone

function insert(item, user, request) {
 
    if (item.name.length > 5) {
        request.respond(statusCodes.BAD_REQUEST, 'Text length must be under 5');
    } else {
        request.execute();
    }

}

             if (error && error.code == MSErrorMessageErrorCode) {
                 NSLog(@"ERROR %@", error);
                 UIAlertView *av =
                 [[UIAlertView alloc]
                  initWithTitle:@"Request Failed"
                  message:error.localizedDescription
                  delegate:nil
                  cancelButtonTitle:@"OK"
                  otherButtonTitles:nil
                  ];
                 [av show];

-(void)addItem:(NSDictionary *)item completion:(QSCompletionBlock)completion
{
    // Insert the item into the TodoItem table and add to the items array on completion
    [self.table insert:item completion:^(NSDictionary *result, NSError *error)
     {
         [self logErrorIfNotNil:error];
         
         BOOL goodRequest = !((error) && (error.code == MSErrorMessageErrorCode));
         
         // detect text validation error from service.
         if (goodRequest) // The service responded appropriately
         {
             NSUInteger index = [items count];
             [(NSMutableArray *)items insertObject:result atIndex:index];
             
             // Let the caller know that we finished
             completion(0);
             
         }
         else{
             
             // if there's an error that came from the service
             // log it, and popup up the returned string.
             if (error && error.code == MSErrorMessageErrorCode) {
                 NSLog(@"ERROR %@", error);
                 UIAlertView *av =
                 [[UIAlertView alloc]
                  initWithTitle:@"Request Failed"
                  message:error.localizedDescription
                  delegate:nil
                  cancelButtonTitle:@"OK"
                  otherButtonTitles:nil
                  ];
                 [av show];
             }
         }

     }];
}

- (IBAction)btnSave:(id)sender {
    
    // Add Data Table Service
    NSDictionary *item = @{ @"name": txtName.text, @"email": txtEmail.text };
    [self.memberService addItem:item completion:^
     {
         UIAlertView *av =
         [[UIAlertView alloc]
          initWithTitle:@"Request Suscess"
          message:@"Insert Data Successfully."
          delegate:nil
          cancelButtonTitle:@"OK"
          otherButtonTitles:nil
          ];
         [av show];
     }];
}

//
//  ViewController.h
//  myAppMobileService
//
//  Created by Weerachai on 5/12/56 BE.
//  Copyright (c) 2556 Weerachai. All rights reserved.
//

#import <UIKit/UIKit.h>
 
@interface ViewController : UIViewController
{
    IBOutlet UITextField *txtName;
    IBOutlet UITextField *txtEmail;
}

- (IBAction)btnSave:(id)sender;

@end

//
//  ViewController.m
//  myAppMobileService
//
//  Created by Weerachai on 5/12/56 BE.
//  Copyright (c) 2556 Weerachai. All rights reserved.
//

#import <WindowsAzureMobileServices/WindowsAzureMobileServices.h>
#import "MyMemberService.h"

#import "ViewController.h"
  
@interface ViewController ()

// Private properties
@property (strong, nonatomic)   MyMemberService   *memberService;

@end


@implementation ViewController

@synthesize memberService;


- (void)viewDidLoad
{
    [super viewDidLoad];
    
    // Start Service
    self.memberService = [MyMemberService defaultService];
    
}

- (IBAction)btnSave:(id)sender {
    
    // Add Data Table Service
    NSDictionary *item = @{ @"name": txtName.text, @"email": txtEmail.text };
    [self.memberService addItem:item completion:^
     {
         UIAlertView *av =
         [[UIAlertView alloc]
          initWithTitle:@"Request Suscess"
          message:@"Insert Data Successfully."
          delegate:nil
          cancelButtonTitle:@"OK"
          otherButtonTitles:nil
          ];
         [av show];
     }];
}

- (void)didReceiveMemoryWarning
{
    [super didReceiveMemoryWarning];
    // Dispose of any resources that can be recreated.
}

- (void)dealloc {
    [txtName release];
    [txtEmail release];
    [super dealloc];
}


@end

//
//  MyMemberService.h
//  myAppMobileService
//
//  Created by Weerachai on 7/21/56 BE.
//  Copyright (c) 2556 Weerachai. All rights reserved.
//

#import <WindowsAzureMobileServices/WindowsAzureMobileServices.h>
#import <Foundation/Foundation.h>


typedef void (^QSCompletionBlock) ();
typedef void (^QSBusyUpdateBlock) (BOOL busy);
 

@interface MyMemberService : NSObject

@property (nonatomic, strong)   NSArray *items;
@property (nonatomic, strong)   MSClient *client;
@property (nonatomic, copy)     QSBusyUpdateBlock busyUpdate;


+ (MyMemberService *)defaultService;


- (void)addItem:(NSDictionary *)item
     completion:(QSCompletionBlock)completion;

- (void)handleRequest:(NSURLRequest *)request
                 next:(MSFilterNextBlock)next
             response:(MSFilterResponseBlock)response;

@end

//
//  MyMemberService.m
//  myAppMobileService
//
//  Created by Weerachai on 7/21/56 BE.
//  Copyright (c) 2556 Weerachai. All rights reserved.
//

#import "MyMemberService.h"
#import <WindowsAzureMobileServices/WindowsAzureMobileServices.h>


@interface MyMemberService() <MSFilter>

@property (nonatomic, strong)   MSTable *table;
@property (nonatomic)           NSInteger busyCount;

@end

@implementation MyMemberService

@synthesize items;

 
+ (MyMemberService *)defaultService
{
    // Create a singleton instance of MyMemberService
    static MyMemberService* service;
    static dispatch_once_t onceToken;
    dispatch_once(&onceToken, ^{
        service = [[MyMemberService alloc] init];
    });
    
    return service;
}

-(MyMemberService *)init
{
    self = [super init];
    
    if (self)
    {
        // Initialize the Mobile Service client with your URL and key
        MSClient *client = [MSClient clientWithApplicationURLString:@"https://thaicreate.azure-mobile.net/"
        applicationKey:@"uJPAhkAkcTBuTyCNxaOSnDKFzkoYqB49"];
        
        // Add a Mobile Service filter to enable the busy indicator
        self.client = [client clientWithFilter:self];
        
        // Create an MSTable instance to allow us to work with the TodoItem table
        self.table = [_client tableWithName:@"MyMember"];
        
        self.items = [[NSMutableArray alloc] init];
        self.busyCount = 0;
    }
    
    return self;
}



-(void)addItem:(NSDictionary *)item completion:(QSCompletionBlock)completion
{
    // Insert the item into the TodoItem table and add to the items array on completion
    [self.table insert:item completion:^(NSDictionary *result, NSError *error)
     {
         [self logErrorIfNotNil:error];
         
         BOOL goodRequest = !((error) && (error.code == MSErrorMessageErrorCode));
         
         // detect text validation error from service.
         if (goodRequest) // The service responded appropriately
         {
             NSUInteger index = [items count];
             [(NSMutableArray *)items insertObject:result atIndex:index];
             
             // Let the caller know that we finished
             completion(0);
             
         }
         else{
             
             // if there's an error that came from the service
             // log it, and popup up the returned string.
             if (error && error.code == MSErrorMessageErrorCode) {
                 NSLog(@"ERROR %@", error);
                 UIAlertView *av =
                 [[UIAlertView alloc]
                  initWithTitle:@"Request Failed"
                  message:error.localizedDescription
                  delegate:nil
                  cancelButtonTitle:@"OK"
                  otherButtonTitles:nil
                  ];
                 [av show];
             }
         }

     }];
}

- (void)busy:(BOOL)busy
{
    // assumes always executes on UI thread
    if (busy)
    {
        if (self.busyCount == 0 && self.busyUpdate != nil)
        {
            self.busyUpdate(YES);
        }
        self.busyCount ++;
    }
    else
    {
        if (self.busyCount == 1 && self.busyUpdate != nil)
        {
            self.busyUpdate(FALSE);
        }
        self.busyCount--;
    }
}

- (void)logErrorIfNotNil:(NSError *) error
{
    if (error)
    {
        NSLog(@"ERROR %@", error);
    }
}


- (void)handleRequest:(NSURLRequest *)request
                 next:(MSFilterNextBlock)next
             response:(MSFilterResponseBlock)response
{
    // A wrapped response block that decrements the busy counter
    MSFilterResponseBlock wrappedResponse = ^(NSHTTPURLResponse *innerResponse, NSData *data, NSError *error)
    {
        [self busy:NO];
        response(innerResponse, data, error);
    };
    
    // Increment the busy counter before sending the request
    [self busy:YES];
    next(request, wrappedResponse);
}

@end