Facebook auto check

facebook2.m

/**
  *The following mimics thefunctionality of showDialog in how to call the function but instead of using the method
  * to know what dialog to show we use the passed method name to check for that permssion e.g. "email". 
  */
  
// In www/facebook-native.js 
exports.checkHasCorrectPermissions = function checkHasCorrectPermissions (s, f) {
  exec(s, f, 'FacebookConnectPlugin', 'checkHasCorrectPermissions', [])
}

// In src/ios/FacebookConnectPlugin.h
- (void) checkHasCorrectPermissions:(CDVInvokedUrlCommand*)command

// In src/ios/FacebookConnectPlugin.m

- (void) checkHasCorrectPermissions:(CDVInvokedUrlCommand*)command{
    
    NSArray *permissions = ["email","user_friends","user_likes","user_birthday","user_photos"];
    NSSet *grantedPermissions = [FBSDKAccessToken currentAccessToken].permissions; //gets current list of permissions

    for (NSString value in permissions) {
        if !([grantedPermissions containsObject:value]) { //checks if permissions does not exists
            CDVPluginResult* pluginResult = [CDVPluginResult resultWithStatus:CDVCommandStatus_ERROR];
            [self.commandDelegate sendPluginResult:pluginResult callbackId:command.callbackId];
            return;
        }
    }
    
    CDVPluginResult* pluginResult = [CDVPluginResult resultWithStatus:CDVCommandStatus_OK];
    [self.commandDelegate sendPluginResult:pluginResult callbackId:command.callbackId];
    return;
}