formManager.getFormFields - Code Metrics - Inspection of "Fixes #226, Incoperates #234 / closes #234. Fixes..." - nextcloud/passman-webextension - Measure and Improve Code Quality continuously with Scrutinizer

Completed

Pull Request — master (#243)

by Sander

created 2018-04-02 10:47 UTC

formManager.getFormFields D

↳ Parent: formManager.constructor

Complexity

Conditions	20
Paths	74

Size

Total Lines

Duplication

Lines	0
Ratio	0 %

Importance

Changes	3
Bugs	0	Features	1

Metric	Value
cc	20
c	3
b	0
f	1
nc	74
nop	2
dl	0
loc	91
rs	4.7294

How to fix Long Method Complexity

var formManager = function () {
    /**
     Code based on:
     @url https://dxr.mozilla.org/firefox/source/toolkit/components/passwordmgr/src/nsLoginManager.js#655
     */
    var settings = {};

    return {
        _init_: function () {
            API.runtime.sendMessage(API.runtime.id, {method: 'getSetting', args: 'debug'}).then(function (result) {
                settings.debug = (result);
            });
        },
        /**
         *
         * _isAutoCompleteDisabled
         *
         * Returns true if the page requests autocomplete be disabled for the
         * specified form input.
         */
        isAutocompleteDisabled: function (element) {
            return !!(element && element.hasAttribute("autocomplete") && element.getAttribute("autocomplete").toLowerCase() === "off");
        },
        /**
         * Check if if an element is visible
         * @param element
         * @returns {boolean}
         */
        isElementVisible: function (element) {
            return !!( element.offsetWidth || element.offsetHeight || element.getClientRects().length );
        },
        /**
         * _getPasswordFields
         *
         * Returns an array of password field elements for the specified form.
         * If no pw fields are found, or if more than 3 are found, then null
         * is returned.
         *
         * skipEmptyFields can be set to ignore password fields with no value.
         */
        _getPasswordFields: function (form, skipEmptyFields) {
            // Locate the password fields in the form.
            var pwFields = [];
            for (var i = 0; i < form.elements.length; i++) {
                var elem = form.elements[i];
                if (elem.type !== "password") {
                    continue;
                }

                if (!this.isElementVisible(elem)) {
                    continue;
                }

                if (skipEmptyFields && !elem.value) {
                    continue;
                }

                pwFields[pwFields.length] = {
                    index: i,
                    element: elem
                };
            }

            // If too few or too many fields, bail out.
            if (pwFields.length === 0) {
                this.log('(form ignored (' + form.action + ') -- no password fields.)');
                return null;
            } else if (pwFields.length > 3) {
                this.log('(form ignored -- too many password fields. [got ' +
                    pwFields.length + "])");
                return null;
            }

            return pwFields;
        },
        _getUsernameFields: function (form) {
            var usernameFields = [];
            for (var i = 0; i < form.elements.length; i++) {
                var elem = form.elements[i];
                if(!this.isElementVisible(elem)){
                    continue;
                }
                if (elem.type.toLowerCase() !== "text" && elem.type.toLowerCase() !== "email") {
                    continue;
                }

                usernameFields[usernameFields.length] = {
                    index: i,
                    element: elem
                };
            }
            return usernameFields.pop();
        },
        /*
         * _getFormFields
         *
         * Returns the username and password fields found in the form.
         * Can handle complex forms by trying to figure out what the
         * relevant fields are.
         *
         * Returns: [usernameField, newPasswordField, oldPasswordField]
         *
         * usernameField may be null.
         * newPasswordField will always be non-null.
         * oldPasswordField may be null. If null, newPasswordField is just
         * "theLoginField". If not null, the form is apparently a
         * change-password field, with oldPasswordField containing the password
         * that is being changed.
         */
        getFormFields: function (form, isSubmission) {
            var usernameField = null;

            // Locate the password field(s) in the form. Up to 3 supported.
            // If there's no password field, there's nothing for us to do.
            var pwFields = this._getPasswordFields(form, isSubmission);
            if (!pwFields) {
                usernameField = this._getUsernameFields(form);
                if(usernameField && usernameField.hasOwnProperty('element')) {
                    return [usernameField.element, null, null];
                } else {
                    return [null, null, null];
                }
            }


            // Locate the username field in the form by searching backwards
            // from the first passwordfield, assume the first text field is the
            // username. We might not find a username field if the user is
            // already logged in to the site.
            for (var i = pwFields[0].index - 1; i >= 0; i--) {
                if (!this.isElementVisible(form.elements[i])) {
                    continue;
                }
                if (form.elements[i].type.toLowerCase() === "text" || form.elements[i].type.toLowerCase() === "email") {
                    usernameField = form.elements[i];
                    break;
                }
            }

            if (!usernameField) {
                this.log('(form (' + form.action + ') ignored -- no username field found)');
            }


            // If we're not submitting a form (it's a page load), there are no
            // password field values for us to use for identifying fields. So,
            // just assume the first password field is the one to be filled in.
            if (!isSubmission || pwFields.length === 1) {
                var res = [usernameField, pwFields[0].element];
                if (pwFields[1]) {
                    res.push(pwFields[1].element);
                } else {
                    res.push(null);
                }
                return res;
            }


            // Try to figure out WTF is in the form based on the password values.
            var oldPasswordField, newPasswordField;
            var pw1 = pwFields[0].element.value;
            var pw2 = pwFields[1].element.value;
            var pw3 = (pwFields[2] ? pwFields[2].element.value : null);

            if (pwFields.length === 3) {
                // Look for two identical passwords, that's the new password

                if (pw1 === pw2 && pw2 === pw3) {
                    // All 3 passwords the same? Weird! Treat as if 1 pw field.
                    newPasswordField = pwFields[0].element;
                    oldPasswordField = null;
                } else if (pw1 === pw2) {
                    newPasswordField = pwFields[0].element;
                    oldPasswordField = pwFields[2].element;
                } else if (pw2 === pw3) {
                    oldPasswordField = pwFields[0].element;
                    newPasswordField = pwFields[2].element;
                } else if (pw1 === pw3) {
                    // A bit odd, but could make sense with the right page layout.
                    newPasswordField = pwFields[0].element;
                    oldPasswordField = pwFields[1].element;
                } else {
                    // We can't tell which of the 3 passwords should be saved.
                    this.log("(form ignored -- all 3 pw fields differ)");
                    return [null, null, null];
                }
            } else { // pwFields.length == 2
                if (pw1 === pw2) {
                    // Treat as if 1 pw field
                    newPasswordField = pwFields[0].element;
                    oldPasswordField = null;
                } else {
                    // Just assume that the 2nd password is the new password
                    oldPasswordField = pwFields[0].element;
                    newPasswordField = pwFields[1].element;
                }
            }

            return [usernameField, newPasswordField, oldPasswordField];
        },
        log: function (str) {
            if (settings.debug) {
                console.log(str);

            }
        }
    };
}();

function getLoginFields(isSubmission) {
    var forms = document.forms;
    var loginForms = [];

    for (var i = 0; i < forms.length; i++) {
        var form = forms[i];
        var result = formManager.getFormFields(form, isSubmission);
        var usernameField = result[0];
        var passwordField = result[1];

        var res = [usernameField, passwordField];
        if (result[2]) {
            res.push(result[2]);
        } else {
            res.push(null);
        }
        loginForms.push(res);
    }
    return loginForms;
}

function getFormFromElement(elem) {
    if (elem) {
function isBig(a) {
    if (a > 5000) {
        return "yes";
    }
}

console.log(isBig(5001)); //returns yes
console.log(isBig(42)); //returns undefined
        while (elem.parentNode) {
            if (elem.parentNode.nodeName.toLowerCase() === "form") {
                return elem.parentNode;
            }
            elem = elem.parentNode;
        }

    }
}

function dispatchEvents(element) {
    var eventNames = ['click', 'focus', 'keypress', 'keydown', 'keyup', 'input', 'blur', 'change'];
    eventNames.forEach(function (eventName) {
        element.dispatchEvent(new Event(eventName, {"bubbles": true}));

    });
}

function fillPassword(user, password) {
    // var loginFields = getLoginFields();
    // for (var i = 0; i < loginFields.length; i++) {
    //     if(user && loginFields[i][0]){
    //         loginFields[i][0].value = user;
    //         if(loginFields[i][0].offsetParent) {
    //             dispatchEvents(loginFields[i][0]);
    //         }
    //     }
    //     if(password && loginFields[i][1]) {
    //         loginFields[i][1].value = password;
    //         if(loginFields[i][1].offsetParent) {
    //             dispatchEvents(loginFields[i][1]);
    //         }
    //     }
    //     if(password && loginFields[i][2]) {
    //         loginFields[i][2].value = password;
    //         if(loginFields[i][2].offsetParent) {
    //             dispatchEvents(loginFields[i][2]);
    //         }
    //     }
    // }
    if (user) {
        document.querySelectorAll('input[type=text], input[type=email]').forEach(function (el) {
            el.value = user;
            dispatchEvents(el);
        });
    }
    if (password) {
        document.querySelectorAll('input[type=password]').forEach(function (el) {
            el.value = password;
            dispatchEvents(el);
        });
    }
}

formManager._init_();

1			var formManager = function () {
2			/**
3			Code based on:
4			@url https://dxr.mozilla.org/firefox/source/toolkit/components/passwordmgr/src/nsLoginManager.js#655
5			*/
6			var settings = {};
7
8			return {
9			_init_: function () {
10			API.runtime.sendMessage(API.runtime.id, {method: 'getSetting', args: 'debug'}).then(function (result) {
11			settings.debug = (result);
12			});
13			},
14			/**
15			*
16			* _isAutoCompleteDisabled
17			*
18			* Returns true if the page requests autocomplete be disabled for the
19			* specified form input.
20			*/
21			isAutocompleteDisabled: function (element) {
22			return !!(element && element.hasAttribute("autocomplete") && element.getAttribute("autocomplete").toLowerCase() === "off");
23			},
24			/**
25			* Check if if an element is visible
26			* @param element
27			* @returns {boolean}
28			*/
29			isElementVisible: function (element) {
30			return !!( element.offsetWidth \|\| element.offsetHeight \|\| element.getClientRects().length );
31			},
32			/**
33			* _getPasswordFields
34			*
35			* Returns an array of password field elements for the specified form.
36			* If no pw fields are found, or if more than 3 are found, then null
37			* is returned.
38			*
39			* skipEmptyFields can be set to ignore password fields with no value.
40			*/
41			_getPasswordFields: function (form, skipEmptyFields) {
42			// Locate the password fields in the form.
43			var pwFields = [];
44			for (var i = 0; i < form.elements.length; i++) {
45			var elem = form.elements[i];
46			if (elem.type !== "password") {
47			continue;
48			}
49
50			if (!this.isElementVisible(elem)) {
51			continue;
52			}
53
54			if (skipEmptyFields && !elem.value) {
55			continue;
56			}
57
58			pwFields[pwFields.length] = {
59			index: i,
60			element: elem
61			};
62			}
63
64			// If too few or too many fields, bail out.
65			if (pwFields.length === 0) {
66			this.log('(form ignored (' + form.action + ') -- no password fields.)');
67			return null;
68			} else if (pwFields.length > 3) {
69			this.log('(form ignored -- too many password fields. [got ' +
70			pwFields.length + "])");
71			return null;
72			}
73
74			return pwFields;
75			},
76			_getUsernameFields: function (form) {
77			var usernameFields = [];
78			for (var i = 0; i < form.elements.length; i++) {
79			var elem = form.elements[i];
80			if(!this.isElementVisible(elem)){
81			continue;
82			}
83			if (elem.type.toLowerCase() !== "text" && elem.type.toLowerCase() !== "email") {
84			continue;
85			}
86
87			usernameFields[usernameFields.length] = {
88			index: i,
89			element: elem
90			};
91			}
92			return usernameFields.pop();
93			},
94			/*
95			* _getFormFields
96			*
97			* Returns the username and password fields found in the form.
98			* Can handle complex forms by trying to figure out what the
99			* relevant fields are.
100			*
101			* Returns: [usernameField, newPasswordField, oldPasswordField]
102			*
103			* usernameField may be null.
104			* newPasswordField will always be non-null.
105			* oldPasswordField may be null. If null, newPasswordField is just
106			* "theLoginField". If not null, the form is apparently a
107			* change-password field, with oldPasswordField containing the password
108			* that is being changed.
109			*/
110			getFormFields: function (form, isSubmission) {
111			var usernameField = null;
112
113			// Locate the password field(s) in the form. Up to 3 supported.
114			// If there's no password field, there's nothing for us to do.
115			var pwFields = this._getPasswordFields(form, isSubmission);
116			if (!pwFields) {
117			usernameField = this._getUsernameFields(form);
118			if(usernameField && usernameField.hasOwnProperty('element')) {
119			return [usernameField.element, null, null];
120			} else {
121			return [null, null, null];
122			}
123			}
124
125
126			// Locate the username field in the form by searching backwards
127			// from the first passwordfield, assume the first text field is the
128			// username. We might not find a username field if the user is
129			// already logged in to the site.
130			for (var i = pwFields[0].index - 1; i >= 0; i--) {
131			if (!this.isElementVisible(form.elements[i])) {
132			continue;
133			}
134			if (form.elements[i].type.toLowerCase() === "text" \|\| form.elements[i].type.toLowerCase() === "email") {
135			usernameField = form.elements[i];
136			break;
137			}
138			}
139
140			if (!usernameField) {
141			this.log('(form (' + form.action + ') ignored -- no username field found)');
142			}
143
144
145			// If we're not submitting a form (it's a page load), there are no
146			// password field values for us to use for identifying fields. So,
147			// just assume the first password field is the one to be filled in.
148			if (!isSubmission \|\| pwFields.length === 1) {
149			var res = [usernameField, pwFields[0].element];
150			if (pwFields[1]) {
151			res.push(pwFields[1].element);
152			} else {
153			res.push(null);
154			}
155			return res;
156			}
157
158
159			// Try to figure out WTF is in the form based on the password values.
160			var oldPasswordField, newPasswordField;
161			var pw1 = pwFields[0].element.value;
162			var pw2 = pwFields[1].element.value;
163			var pw3 = (pwFields[2] ? pwFields[2].element.value : null);
164
165			if (pwFields.length === 3) {
166			// Look for two identical passwords, that's the new password
167
168			if (pw1 === pw2 && pw2 === pw3) {
169			// All 3 passwords the same? Weird! Treat as if 1 pw field.
170			newPasswordField = pwFields[0].element;
171			oldPasswordField = null;
172			} else if (pw1 === pw2) {
173			newPasswordField = pwFields[0].element;
174			oldPasswordField = pwFields[2].element;
175			} else if (pw2 === pw3) {
176			oldPasswordField = pwFields[0].element;
177			newPasswordField = pwFields[2].element;
178			} else if (pw1 === pw3) {
179			// A bit odd, but could make sense with the right page layout.
180			newPasswordField = pwFields[0].element;
181			oldPasswordField = pwFields[1].element;
182			} else {
183			// We can't tell which of the 3 passwords should be saved.
184			this.log("(form ignored -- all 3 pw fields differ)");
185			return [null, null, null];
186			}
187			} else { // pwFields.length == 2
188			if (pw1 === pw2) {
189			// Treat as if 1 pw field
190			newPasswordField = pwFields[0].element;
191			oldPasswordField = null;
192			} else {
193			// Just assume that the 2nd password is the new password
194			oldPasswordField = pwFields[0].element;
195			newPasswordField = pwFields[1].element;
196			}
197			}
198
199			return [usernameField, newPasswordField, oldPasswordField];
200			},
201			log: function (str) {
202			if (settings.debug) {
203			console.log(str);
			0 ignored issues – show Debugging Code introduced 2017-04-15 12:32 UTC by Report Bug Copy Issue Report `console.log` looks like debug code. Are you sure you do not want to remove it? Loading history...
204			}
205			}
206			};
207			}();
208
209			function getLoginFields(isSubmission) {
210			var forms = document.forms;
211			var loginForms = [];
212
213			for (var i = 0; i < forms.length; i++) {
214			var form = forms[i];
215			var result = formManager.getFormFields(form, isSubmission);
216			var usernameField = result[0];
217			var passwordField = result[1];
218
219			var res = [usernameField, passwordField];
220			if (result[2]) {
221			res.push(result[2]);
222			} else {
223			res.push(null);
224			}
225			loginForms.push(res);
226			}
227			return loginForms;
228			}
229
230			function getFormFromElement(elem) {
231			if (elem) {
			0 ignored issues – show Complexity Best Practice introduced 2017-04-17 10:15 UTC by Report Bug Copy Issue Report There is no return statement if `elem` is `false`. Are you sure this is correct? If so, consider adding `return;` explicitly. This check looks for functions where a `return` statement is found in some execution paths, but not in all. Consider this little piece of code function isBig(a) { if (a > 5000) { return "yes"; } } console.log(isBig(5001)); //returns yes console.log(isBig(42)); //returns undefined The function `isBig` will only return a specific value when its parameter is bigger than 5000. In any other case, it will implicitly return `undefined`. This behaviour may not be what you had intended. In any case, you can add a `return undefined` to the other execution path to make the return value explicit. Loading history...
232			while (elem.parentNode) {
233			if (elem.parentNode.nodeName.toLowerCase() === "form") {
234			return elem.parentNode;
235			}
236			elem = elem.parentNode;
237			}
			0 ignored issues – show Best Practice introduced 2017-06-02 12:49 UTC by Report Bug Copy Issue Report There is no `return` statement in this branch, but you do return something in other branches. Did you maybe miss it? If you do not want to return anything, consider adding `return undefined;` explicitly. Loading history...
238			}
239			}
240
241			function dispatchEvents(element) {
242			var eventNames = ['click', 'focus', 'keypress', 'keydown', 'keyup', 'input', 'blur', 'change'];
243			eventNames.forEach(function (eventName) {
244			element.dispatchEvent(new Event(eventName, {"bubbles": true}));
			0 ignored issues – show Bug introduced 2017-06-02 12:49 UTC by Report Bug Copy Issue Report The variable `Event` seems to be never declared. If this is a global, consider adding a `/** global: Event */` comment. This checks looks for references to variables that have not been declared. This is most likey a typographical error or a variable has been renamed. To learn more about declaring variables in Javascript, see the MDN. Loading history...
245			});
246			}
247
248			function fillPassword(user, password) {
249			// var loginFields = getLoginFields();
250			// for (var i = 0; i < loginFields.length; i++) {
251			// if(user && loginFields[i][0]){
252			// loginFields[i][0].value = user;
253			// if(loginFields[i][0].offsetParent) {
254			// dispatchEvents(loginFields[i][0]);
255			// }
256			// }
257			// if(password && loginFields[i][1]) {
258			// loginFields[i][1].value = password;
259			// if(loginFields[i][1].offsetParent) {
260			// dispatchEvents(loginFields[i][1]);
261			// }
262			// }
263			// if(password && loginFields[i][2]) {
264			// loginFields[i][2].value = password;
265			// if(loginFields[i][2].offsetParent) {
266			// dispatchEvents(loginFields[i][2]);
267			// }
268			// }
269			// }
270			if (user) {
271			document.querySelectorAll('input[type=text], input[type=email]').forEach(function (el) {
272			el.value = user;
273			dispatchEvents(el);
274			});
275			}
276			if (password) {
277			document.querySelectorAll('input[type=password]').forEach(function (el) {
278			el.value = password;
279			dispatchEvents(el);
280			});
281			}
282			}
283
284			formManager._init_();

nextcloud / passman-webextension

Pull Request — master (#243)

formManager.getFormFields D

Complexity

Size

Duplication

Importance

How to fix Long Method Complexity

Long Method

Complexity

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