// Copyright 2018 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#ifndef COMPONENTS_PASSWORD_MANAGER_IOS_JS_PASSWORD_MANAGER_H_
#define COMPONENTS_PASSWORD_MANAGER_IOS_JS_PASSWORD_MANAGER_H_

#include "base/ios/block_types.h"
#import "ios/web/public/web_state/js/crw_js_injection_receiver.h"

// Loads the JavaScript file, password_controller.js, which contains password
// form parsing and autofill functions. It will be evaluated on a page that
// is known to have at least one password form (see hasPasswordField_ in
// password_controller.js) It returns contents of those password forms and also
// registers functions that are later used to autofill them.
@interface JsPasswordManager : NSObject

// Finds any password forms on the web page.
// |completionHandler| is then called with the JSON string result (which can
// be a zero-length string if there was an error). |completionHandler| cannot be
// nil.
// For example the JSON string for a form with a single password field is:
// [{"action":null,"method":null,"usernameElement":"","usernameValue":"","
// passwords":[{"element":"","value":"asd"}]}]
- (void)findPasswordFormsWithCompletionHandler:
    (void (^)(NSString*))completionHandler;

// Extracts the password form with the given name from a web page.
// |completionHandler| is called with the JSON string containing the info about
// submitted password forms from a web page (it can be zero-length if there was
// an error). |completionHandler| cannot be nil.
// For example. the JSON string for a form with a single password field is:
// {"action":null,"method":null,"usernameElement":"","usernameValue":"",
// "passwords":[{"element":"","value":"asd"}]}
- (void)extractForm:(NSString*)formName
  completionHandler:(void (^)(NSString*))completionHandler;

// Fills in the password form specified by |JSONString| with the given
// |username| and |password|. Assumes JavaScript has been injected previously
// by calling |findPasswordFormsWithCompletionHandle| or
// |extractSubmittedFormWithCompletionHandler|. Calls |completionHandler| with
// YES if the filling of the password was successful, NO otherwise.
// |completionHandler| cannot be nil.
- (void)fillPasswordForm:(NSString*)JSONString
            withUsername:(NSString*)username
                password:(NSString*)password
       completionHandler:(void (^)(BOOL))completionHandler;

// Designated initializer. |receiver| should not be nil.
- (instancetype)initWithReceiver:(CRWJSInjectionReceiver*)receiver
    NS_DESIGNATED_INITIALIZER;

- (instancetype)init NS_UNAVAILABLE;

@end

#endif  // COMPONENTS_PASSWORD_MANAGER_IOS_JS_PASSWORD_MANAGER_H_