Merge branch 'group-name-validation' into 'master'

Adds JavaScript validation for group path editing

## What does this MR do?

- Prevents group_edit form submission when special characters are included in the new group name
- Enhances gl_field_errors to support this use case and be more re-usable. 

## Are there points in the code the reviewer needs to double check?

**The implementation of validation is here: https://gitlab.com/gitlab-org/gitlab-ce/commit/73d997046cac376ccdbcaac6f183002bc19b9a1f**

The rest of the diff for this MR is augmenting gl_field_errors

## Why was this MR needed?

- Currently we allow submission and a 500 error is returned. 

## Screenshots (if relevant)
![2016-10-21_14.11.21](/uploads/2bef5764d3f2429dd0f900661153eef7/2016-10-21_14.11.21.gif)
## Does this MR meet the acceptance criteria?

- [x] [CHANGELOG](https://gitlab.com/gitlab-org/gitlab-ce/blob/master/CHANGELOG.md) entry added
- [x] [Documentation created/updated](https://gitlab.com/gitlab-org/gitlab-ce/blob/master/doc/development/doc_styleguide.md)
- [x] All builds are passing
- [x] Conform by the [merge request performance guides](http://docs.gitlab.com/ce/development/merge_request_performance_guidelines.html)
- [x] Conform by the [style guides](https://gitlab.com/gitlab-org/gitlab-ce/blob/master/CONTRIBUTING.md#style-guides)
- [x] Branch has no merge conflicts with `master` (if it does - rebase it please)
- [x] [Squashed related commits together](https://git-scm.com/book/en/Git-Tools-Rewriting-History#Squashing-Commits)

## What are the relevant issue numbers?

Closes https://gitlab.com/gitlab-org/gitlab-ce/issues/23564, https://gitlab.com/gitlab-org/gitlab-ce/issues/19756, https://gitlab.com/gitlab-org/gitlab-ce/issues/19736, https://gitlab.com/gitlab-org/gitlab-ce/issues/23922

See merge request !7041

5 files changed, 203 insertions, 155 deletions

diff --git a/app/assets/javascripts/dispatcher.js.es6 b/app/assets/javascripts/dispatcher.js.es6
index ff8b8f6d0ae..8e4fd1f19ba 100644
--- a/app/assets/javascripts/dispatcher.js.es6
+++ b/app/assets/javascripts/dispatcher.js.es6
@@ -299,7 +299,7 @@
     };
 
     Dispatcher.prototype.initFieldErrors = function() {
-      $('.show-gl-field-errors').each((i, form) => {
+      $('.gl-show-field-errors').each((i, form) => {
         new gl.GlFieldErrors(form);
       });
     };
diff --git a/app/assets/javascripts/gl_field_error.js.es6 b/app/assets/javascripts/gl_field_error.js.es6
new file mode 100644
index 00000000000..f7cbecc0385
--- /dev/null
+++ b/app/assets/javascripts/gl_field_error.js.es6
@@ -0,0 +1,164 @@
+/* eslint-disable no-param-reassign */
+((global) => {
+  /*
+   * This class overrides the browser's validation error bubbles, displaying custom
+   * error messages for invalid fields instead. To begin validating any form, add the
+   * class `gl-show-field-errors` to the form element, and ensure error messages are
+   * declared in each inputs' `title` attribute. If no title is declared for an invalid
+   * field the user attempts to submit, "This field is required." will be shown by default.
+   *
+   * Opt not to validate certain fields by adding the class `gl-field-error-ignore` to the input.
+   *
+   * Set a custom error anchor for error message to be injected after with the
+   * class `gl-field-error-anchor`
+   *
+   * Examples:
+   *
+   * Basic:
+   *
+   * <form class='gl-show-field-errors'>
+   *  <input type='text' name='username' title='Username is required.'/>
+   * </form>
+   *
+   * Ignore specific inputs (e.g. UsernameValidator):
+   *
+   * <form class='gl-show-field-errors'>
+   *   <div class="form-group>
+   *     <input type='text' class='gl-field-errors-ignore' pattern='[a-zA-Z0-9-_]+'/>
+   *   </div>
+   *   <div class="form-group">
+   *      <input type='text' name='username' title='Username is required.'/>
+   *    </div>
+   * </form>
+   *
+   * Custom Error Anchor (allows error message to be injected after specified element):
+   *
+   * <form class='gl-show-field-errors'>
+   *  <div class="form-group gl-field-error-anchor">
+   *    <input type='text' name='username' title='Username is required.'/>
+   *    // Error message typically injected here
+   *  </div>
+   *  // Error message now injected here
+   * </form>
+   *
+    * */
+
+  /*
+    * Regex Patterns in use:
+    *
+    * Only alphanumeric: : "[a-zA-Z0-9]+"
+    * No special characters : "[a-zA-Z0-9-_]+",
+    *
+    * */
+
+  const errorMessageClass = 'gl-field-error';
+  const inputErrorClass = 'gl-field-error-outline';
+  const errorAnchorSelector = '.gl-field-error-anchor';
+  const ignoreInputSelector = '.gl-field-error-ignore';
+
+  class GlFieldError {
+    constructor({ input, formErrors }) {
+      this.inputElement = $(input);
+      this.inputDomElement = this.inputElement.get(0);
+      this.form = formErrors;
+      this.errorMessage = this.inputElement.attr('title') || 'This field is required.';
+      this.fieldErrorElement = $(`<p class='${errorMessageClass} hide'>${this.errorMessage}</p>`);
+
+      this.state = {
+        valid: false,
+        empty: true,
+      };
+
+      this.initFieldValidation();
+    }
+
+    initFieldValidation() {
+      const customErrorAnchor = this.inputElement.parents(errorAnchorSelector);
+      const errorAnchor = customErrorAnchor.length ? customErrorAnchor : this.inputElement;
+
+      // hidden when injected into DOM
+      errorAnchor.after(this.fieldErrorElement);
+      this.inputElement.off('invalid').on('invalid', this.handleInvalidSubmit.bind(this));
+      this.scopedSiblings = this.safelySelectSiblings();
+    }
+
+    safelySelectSiblings() {
+      // Apply `ignoreSelector` in markup to siblings whose visibility should not be toggled
+      const unignoredSiblings = this.inputElement.siblings(`p:not(${ignoreInputSelector})`);
+      const parentContainer = this.inputElement.parent('.form-group');
+
+      // Only select siblings when they're scoped within a form-group with one input
+      const safelyScoped = parentContainer.length && parentContainer.find('input').length === 1;
+
+      return safelyScoped ? unignoredSiblings : this.fieldErrorElement;
+    }
+
+    renderValidity() {
+      this.renderClear();
+
+      if (this.state.valid) {
+        this.renderValid();
+      } else if (this.state.empty) {
+        this.renderEmpty();
+      } else if (!this.state.valid) {
+        this.renderInvalid();
+      }
+    }
+
+    handleInvalidSubmit(event) {
+      event.preventDefault();
+      const currentValue = this.accessCurrentValue();
+      this.state.valid = false;
+      this.state.empty = currentValue === '';
+
+      this.renderValidity();
+      this.form.focusOnFirstInvalid.apply(this.form);
+      // For UX, wait til after first invalid submission to check each keyup
+      this.inputElement.off('keyup.fieldValidator')
+        .on('keyup.fieldValidator', this.updateValidity.bind(this));
+    }
+
+    /* Get or set current input value */
+    accessCurrentValue(newVal) {
+      return newVal ? this.inputElement.val(newVal) : this.inputElement.val();
+    }
+
+    getInputValidity() {
+      return this.inputDomElement.validity.valid;
+    }
+
+    updateValidity() {
+      const inputVal = this.accessCurrentValue();
+      this.state.empty = !inputVal.length;
+      this.state.valid = this.getInputValidity();
+      this.renderValidity();
+    }
+
+    renderValid() {
+      return this.renderClear();
+    }
+
+    renderEmpty() {
+      return this.renderInvalid();
+    }
+
+    renderInvalid() {
+      this.inputElement.addClass(inputErrorClass);
+      this.scopedSiblings.hide();
+      return this.fieldErrorElement.show();
+    }
+
+    renderClear() {
+      const inputVal = this.accessCurrentValue();
+      if (!inputVal.split(' ').length) {
+        const trimmedInput = inputVal.trim();
+        this.accessCurrentValue(trimmedInput);
+      }
+      this.inputElement.removeClass(inputErrorClass);
+      this.scopedSiblings.hide();
+      this.fieldErrorElement.hide();
+    }
+  }
+
+  global.GlFieldError = GlFieldError;
+})(window.gl || (window.gl = {}));
diff --git a/app/assets/javascripts/gl_field_errors.js.es6 b/app/assets/javascripts/gl_field_errors.js.es6
index be6c3ec274f..6ce392d2a5b 100644
--- a/app/assets/javascripts/gl_field_errors.js.es6
+++ b/app/assets/javascripts/gl_field_errors.js.es6
@@ -1,131 +1,9 @@
 /* eslint-disable */
-((global) => {
-  /*
-   * This class overrides the browser's validation error bubbles, displaying custom
-   * error messages for invalid fields instead. To begin validating any form, add the
-   * class `show-gl-field-errors` to the form element, and ensure error messages are
-   * declared in each inputs' title attribute.
-   *
-   * Example:
-   *
-   * <form class='show-gl-field-errors'>
-   *  <input type='text' name='username' title='Username is required.'/>
-   *</form>
-   *
-    * */
-
-  const errorMessageClass = 'gl-field-error';
-  const inputErrorClass = 'gl-field-error-outline';
-
-  class GlFieldError {
-    constructor({ input, formErrors }) {
-      this.inputElement = $(input);
-      this.inputDomElement = this.inputElement.get(0);
-      this.form = formErrors;
-      this.errorMessage = this.inputElement.attr('title') || 'This field is required.';
-      this.fieldErrorElement = $(`<p class='${errorMessageClass} hide'>${ this.errorMessage }</p>`);
-
-      this.state = {
-        valid: false,
-        empty: true
-      };
-
-      this.initFieldValidation();
-    }
-
-    initFieldValidation() {
-      // hidden when injected into DOM
-      this.inputElement.after(this.fieldErrorElement);
-      this.inputElement.off('invalid').on('invalid', this.handleInvalidSubmit.bind(this));
-      this.scopedSiblings = this.safelySelectSiblings();
-    }
-
-    safelySelectSiblings() {
-      // Apply `ignoreSelector` in markup to siblings whose visibility should not be toggled with input validity
-      const ignoreSelector = '.validation-ignore';
-      const unignoredSiblings = this.inputElement.siblings(`p:not(${ignoreSelector})`);
-      const parentContainer = this.inputElement.parent('.form-group');
 
-      // Only select siblings when they're scoped within a form-group with one input
-      const safelyScoped = parentContainer.length && parentContainer.find('input').length === 1;
-
-      return safelyScoped ? unignoredSiblings : this.fieldErrorElement;
-    }
-
-    renderValidity() {
-      this.renderClear();
-
-      if (this.state.valid) {
-        return this.renderValid();
-      }
-
-      if (this.state.empty) {
-        return this.renderEmpty();
-      }
-
-      if (!this.state.valid) {
-        return this.renderInvalid();
-      }
-
-    }
+//= require gl_field_error
 
-    handleInvalidSubmit(event) {
-      event.preventDefault();
-      const currentValue = this.accessCurrentValue();
-      this.state.valid = false;
-      this.state.empty = currentValue === '';
-
-      this.renderValidity();
-      this.form.focusOnFirstInvalid.apply(this.form);
-      // For UX, wait til after first invalid submission to check each keyup
-      this.inputElement.off('keyup.field_validator')
-        .on('keyup.field_validator', this.updateValidity.bind(this));
-
-    }
-
-    /* Get or set current input value */
-    accessCurrentValue(newVal) {
-      return newVal ? this.inputElement.val(newVal) : this.inputElement.val();
-    }
-
-    getInputValidity() {
-      return this.inputDomElement.validity.valid;
-    }
-
-    updateValidity() {
-      const inputVal = this.accessCurrentValue();
-      this.state.empty = !inputVal.length;
-      this.state.valid = this.getInputValidity();
-      this.renderValidity();
-    }
-
-    renderValid() {
-      return this.renderClear();
-    }
-
-    renderEmpty() {
-      return this.renderInvalid();
-    }
-
-    renderInvalid() {
-      this.inputElement.addClass(inputErrorClass);
-      this.scopedSiblings.hide();
-      return this.fieldErrorElement.show();
-    }
-
-    renderClear() {
-      const inputVal = this.accessCurrentValue();
-      if (!inputVal.split(' ').length) {
-        const trimmedInput = inputVal.trim();
-        this.accessCurrentValue(trimmedInput);
-      }
-      this.inputElement.removeClass(inputErrorClass);
-      this.scopedSiblings.hide();
-      this.fieldErrorElement.hide();
-    }
-  }
-
-  const customValidationFlag = 'no-gl-field-errors';
+((global) => {
+  const customValidationFlag = 'gl-field-error-ignore';
 
   class GlFieldErrors {
     constructor(form) {
@@ -144,7 +22,7 @@
 
       this.state.inputs = this.form.find(validateSelectors).toArray()
         .filter((input) => !input.classList.contains(customValidationFlag))
-        .map((input) => new GlFieldError({ input, formErrors: this }));
+        .map((input) => new global.GlFieldError({ input, formErrors: this }));
 
       this.form.on('submit', this.catchInvalidFormSubmit);
     }
diff --git a/app/assets/stylesheets/framework/forms.scss b/app/assets/stylesheets/framework/forms.scss
index 761c07384f4..f0727e9688a 100644
--- a/app/assets/stylesheets/framework/forms.scss
+++ b/app/assets/stylesheets/framework/forms.scss
@@ -136,3 +136,35 @@ label {
   color: $red-normal;
 }
 
+.gl-show-field-errors {
+  .gl-field-success-outline {
+    border: 1px solid $green-normal;
+
+    &:focus {
+      box-shadow: 0 0 0 1px $green-normal inset, 0 1px 1px rgba(0, 0, 0, 0.075) inset, 0 0 4px 0 $green-normal;
+      border: 0 none;
+    }
+  }
+
+  .gl-field-error-outline {
+    border: 1px solid $red-normal;
+
+    &:focus {
+      box-shadow: 0 0 0 1px $red-normal inset, 0 1px 1px rgba(0, 0, 0, 0.075) inset, 0 0 4px 0 rgba(210, 40, 82, 0.6);
+      border: 0 none;
+    }
+  }
+
+  .gl-field-success-message {
+    color: $green-normal;
+  }
+
+  .gl-field-error-message {
+    color: $red-normal;
+  }
+
+  .gl-field-hint {
+    color: $gl-text-color;
+  }
+}
+
diff --git a/app/assets/stylesheets/pages/login.scss b/app/assets/stylesheets/pages/login.scss
index a2f5c6c6bd3..10f67b47998 100644
--- a/app/assets/stylesheets/pages/login.scss
+++ b/app/assets/stylesheets/pages/login.scss
@@ -75,43 +75,17 @@
     .login-body {
       font-size: 13px;
 
-
       input + p {
         margin-top: 5px;
       }
 
-      .gl-field-success-outline {
-        border: 1px solid $green-normal;
-
-        &:focus {
-          box-shadow: 0 0 0 1px $green-normal inset, 0 1px 1px rgba(0, 0, 0, 0.075) inset, 0 0 4px 0 $green-normal;
-          border: 0 none;
-        }
-      }
-
-      .gl-field-error-outline {
-        border: 1px solid $red-normal;
-
-        &:focus {
-          box-shadow: 0 0 0 1px $red-normal inset, 0 1px 1px rgba(0, 0, 0, 0.075) inset, 0 0 4px 0 rgba(210, 40, 82, 0.6);
-          border: 0 none;
-        }
-      }
-
-      .username .validation-success,
-      .gl-field-success-message {
+      .username .validation-success {
         color: $green-normal;
       }
 
-      .username .validation-error,
-      .gl-field-error-message {
+      .username .validation-error {
         color: $red-normal;
       }
-
-      .gl-field-hint {
-        color: $gl-text-color;
-      }
-
     }
   }