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-//
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-// JSAlertView.m
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-// JSAlertView
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-//
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-// Created by Jitendra Singh on 10/12/16.
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-// Copyright © 2016 Jitendra Singh. All rights reserved.
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-//
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-
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-#import "JSAlertView.h"
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-
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-@interface JSAlertView ()
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-
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-@property (nonatomic, copy) void(^completionBlock)(NSInteger buttonIndex, NSString *buttonTitle);
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-@property (nonatomic, copy) void(^confirmationBlock)(BOOL accepted);
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-@property (nonatomic, strong) UIWindow *thisAlertWindow;
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-@property (nonatomic, strong) NSMutableArray *allAlertWindows;
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-
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-@end
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-
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-@implementation JSAlertView
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-
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-+ (instancetype)sharedInstance {
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- static dispatch_once_t predicate;
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- static JSAlertView *instance = nil;
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- dispatch_once(&predicate, ^{
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- instance = [[self alloc] init];
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- [instance initalization];
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- });
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- return instance;
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-}
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-
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-- (void)initalization
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-{
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- // do write all initalization code here
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- self.allAlertWindows = [NSMutableArray arrayWithCapacity:0];
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-
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-}
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-
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-+ (instancetype)alert:(NSString*)message
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-{
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- return [self alert:message withTitle:nil buttons:@[@"Ok"] withCompletionHandler:nil];
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-}
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-+ (instancetype)confirm:(NSString*)message withCompletionHandler:(void(^)(BOOL accepted))completionHandler
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-{
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- return [self confirm:message withTitle:nil withCompletionHandler:completionHandler];
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-}
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-
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-+ (instancetype)confirm:(NSString*)message withTitle:(NSString*)title withCompletionHandler:(void(^)(BOOL accepted))completionHandler
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-{
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-#if __IPHONE_OS_VERSION_MAX_ALLOWED >= __IPHONE_8_0
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-
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- JSAlertView *alert = [JSAlertView alertControllerWithTitle:nil message:message preferredStyle:UIAlertControllerStyleAlert];
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- UIAlertAction* noButton = [UIAlertAction actionWithTitle:@"No" style:UIAlertActionStyleDefault handler:^(UIAlertAction * action) {
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- [alert dismissViewControllerAnimated:YES completion:nil];
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- if (completionHandler) {
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- completionHandler(NO);
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- }
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- }];
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- [alert addAction:noButton];
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-
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- UIAlertAction* yesButton = [UIAlertAction actionWithTitle:@"Yes" style:UIAlertActionStyleDefault handler:^(UIAlertAction * action) {
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- [alert dismissViewControllerAnimated:YES completion:nil];
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- if (completionHandler) {
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- completionHandler(YES);
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- }
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- }];
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- [alert addAction:yesButton];
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-
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- [alert show];
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-
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- return alert;
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-#else
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- JSAlertView *alert = [[JSAlertView alloc] initWithTitle:title message:message delegate:self cancelButtonTitle:nil otherButtonTitles:nil];
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- __weak __typeof__(alert) alert_weak_ = (alert);
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- [alert setDelgate:alert_weak_];
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-
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- [alert addButtonWithTitle:@"No"];
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- [alert addButtonWithTitle:@"Yes"];
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-
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- alert.confirmationBlock = completionHandler;
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- [alert show];
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- return alert;
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-#endif
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-}
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-
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-+ (instancetype)alert:(NSString*)message withTitle:(NSString*)title buttons:(NSArray*)buttonTitles withCompletionHandler:(void(^)(NSInteger buttonIndex, NSString *buttonTitle))completionHandler
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-{
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-#if __IPHONE_OS_VERSION_MAX_ALLOWED >= __IPHONE_8_0
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-
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- JSAlertView *alert = [JSAlertView alertControllerWithTitle:nil message:message preferredStyle:UIAlertControllerStyleAlert];
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- for (NSString *btnTitle in buttonTitles) {
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- UIAlertAction* button = [UIAlertAction actionWithTitle:btnTitle style:UIAlertActionStyleDefault handler:^(UIAlertAction * action) {
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- [alert dismissViewControllerAnimated:YES completion:nil];
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- if (completionHandler) {
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- completionHandler([buttonTitles indexOfObject:btnTitle], btnTitle);
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- }
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- }];
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- [alert addAction:button];
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- }
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- [alert show];
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-
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- return alert;
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-#else
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- JSAlertView *alert = [[JSAlertView alloc] initWithTitle:title message:message delegate:self cancelButtonTitle:nil otherButtonTitles:nil];
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- __weak __typeof__(alert) alert_weak_ = (alert);
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- [alert setDelgate:alert_weak_];
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- __block NSInteger index = 0;
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- for (NSString *btnTitle in buttonTitles) {
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- [alert addButtonWithTitle:btnTitle];
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- }
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- alert.completionBlock = completionHandler;
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- [alert show];
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- return alert;
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-#endif
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-}
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-
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-- (void)alertView:(UIAlertView *)alertView didDismissWithButtonIndex:(NSInteger)buttonIndex
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-{
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- if (self.completionBlock) {
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- self.completionBlock(buttonIndex, [alertView buttonTitleAtIndex:buttonIndex]);
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- }
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- else if (self.confirmationBlock) {
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- self.confirmationBlock(!(buttonIndex == 0));
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- }
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-}
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-
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-+ (BOOL)isOpenAlertWindows
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-{
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- return [[JSAlertView sharedInstance].allAlertWindows count];
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-}
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-
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-
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-/***********************************************************************
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- *
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- * Following methods will be used for iOS 8 or later for UIAlertController
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- *
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- ***********************************************************************/
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-
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-#if __IPHONE_OS_VERSION_MAX_ALLOWED >= __IPHONE_8_0
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-
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-- (void)show {
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- [self show:YES];
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-}
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-
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-- (void)show:(BOOL)animated {
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-
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- //create a new window for the alert
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- self.thisAlertWindow = [[UIWindow alloc] initWithFrame:[UIScreen mainScreen].bounds];
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- self.thisAlertWindow.rootViewController = [[UIViewController alloc] init];
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-
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- // set this window on top in stack
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- UIWindow *topWindow = [UIApplication sharedApplication].windows.lastObject;
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- self.thisAlertWindow.windowLevel = topWindow.windowLevel + 1;
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-
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- // make it visible and show alert
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- [self.thisAlertWindow makeKeyAndVisible];
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- [self.thisAlertWindow.rootViewController presentViewController:self animated:animated completion:nil];
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-
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- // set alpha 0.0 for last alert to make it transparent, this will give feel of single alert displayed on screen
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- [[JSAlertView sharedInstance].allAlertWindows.lastObject setAlpha:0.0];
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- [[JSAlertView sharedInstance].allAlertWindows addObject:self.thisAlertWindow];
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-}
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-
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-- (void)viewWillDisappear:(BOOL)animated {
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- [super viewWillDisappear:animated];
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-
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- // remove this window from stack
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- [[JSAlertView sharedInstance].allAlertWindows removeObject:self.thisAlertWindow];
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- // set alpha 1.0 for last alert to make it appear
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- [UIView animateWithDuration:0.3 animations:^{
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- [[JSAlertView sharedInstance].allAlertWindows.lastObject setAlpha:1.0];
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- }];
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-}
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-
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-- (void)viewDidDisappear:(BOOL)animated {
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- [super viewDidDisappear:animated];
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-
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- // once the alert is disappeared set window property to nil, else it will create retain cycle
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- self.thisAlertWindow.hidden = YES;
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- self.thisAlertWindow = nil;
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-}
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-
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-
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-#endif
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-@end
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Marino Faggiana