Refactor issuable description and metadata form sections

Signed-off-by: Rémy Coutable <remy@rymai.me>

app/views/shared/issuable/_form.html.haml

@@ -16,20 +16,9 @@
   = render 'shared/issuable/form/template_selector', issuable: issuable
   = render 'shared/issuable/form/title', issuable: issuable, form: form
 
-.form-group.detail-page-description
-  = form.label :description, 'Description', class: 'control-label'
-  .col-sm-10
-
-    = render layout: 'projects/md_preview', locals: { preview_class: "md-preview", referenced_users: true } do
-      = render 'projects/zen', f: form, attr: :description,
-                               classes: 'note-textarea',
-                               placeholder: "Write a comment or drag your files here...",
-                               supports_slash_commands: !issuable.persisted?
-      = render 'projects/notes/hints', supports_slash_commands: !issuable.persisted?
-      .clearfix
-      .error-alert
+= render 'shared/issuable/form/description', issuable: issuable, form: form
 
-- if issuable.is_a?(Issue)
+- if issuable.respond_to?(:confidential)
   .form-group
     .col-sm-offset-2.col-sm-10
       .checkbox
@@ -37,38 +26,7 @@
           = form.check_box :confidential
           This issue is confidential and should only be visible to team members with at least Reporter access.
 
-- if can?(current_user, :"admin_#{issuable.to_ability_name}", issuable.project)
-  - has_due_date = issuable.has_attribute?(:due_date)
-  %hr
-  .row
-    %div{ class: (has_due_date ? "col-lg-6" : "col-sm-12") }
-      .form-group.issue-assignee
-        = form.label :assignee_id, "Assignee", class: "control-label #{"col-lg-4" if has_due_date}"
-        .col-sm-10{ class: ("col-lg-8" if has_due_date) }
-          .issuable-form-select-holder
-            - if issuable.assignee_id
-              = form.hidden_field :assignee_id
-            = dropdown_tag(user_dropdown_label(issuable.assignee_id, "Assignee"), options: { toggle_class: "js-dropdown-keep-input js-user-search js-issuable-form-dropdown js-assignee-search", title: "Select assignee", filter: true, dropdown_class: "dropdown-menu-user dropdown-menu-selectable dropdown-menu-assignee js-filter-submit",
-              placeholder: "Search assignee", data: { first_user: current_user.try(:username), null_user: true, current_user: true, project_id: project.try(:id), selected: issuable.assignee_id, field_name: "#{issuable.class.model_name.param_key}[assignee_id]", default_label: "Assignee"} })
-      .form-group.issue-milestone
-        = form.label :milestone_id, "Milestone", class: "control-label #{"col-lg-4" if has_due_date}"
-        .col-sm-10{ class: ("col-lg-8" if has_due_date) }
-          .issuable-form-select-holder
-            = render "shared/issuable/milestone_dropdown", selected: issuable.milestone, name: "#{issuable.class.model_name.param_key}[milestone_id]", show_any: false, show_upcoming: false, extra_class: "js-issuable-form-dropdown js-dropdown-keep-input", dropdown_title: "Select milestone"
-      .form-group
-        - has_labels = @labels && @labels.any?
-        = form.label :label_ids, "Labels", class: "control-label #{"col-lg-4" if has_due_date}"
-        = form.hidden_field :label_ids, multiple: true, value: ''
-        .col-sm-10{ class: "#{"col-lg-8" if has_due_date} #{'issuable-form-padding-top' if !has_labels}" }
-          .issuable-form-select-holder
-            = render "shared/issuable/label_dropdown", classes: ["js-issuable-form-dropdown"], selected: issuable.labels, data_options: { field_name: "#{issuable.class.model_name.param_key}[label_ids][]", show_any: false}, dropdown_title: "Select label"
-    - if has_due_date
-      .col-lg-6
-        .form-group
-          = form.label :due_date, "Due date", class: "control-label"
-          .col-sm-10
-            .issuable-form-select-holder
-              = form.text_field :due_date, id: "issuable-due-date", class: "datepicker form-control", placeholder: "Select due date"
+= render 'shared/issuable/form/metadata', issuable: issuable, form: form
 
 - if issuable.can_move?(current_user)
   %hr

app/views/shared/issuable/form/_description.html.haml

+- issuable = local_assigns.fetch(:issuable)
+- form = local_assigns.fetch(:form)
+
+.form-group.detail-page-description
+  = form.label :description, 'Description', class: 'control-label'
+  .col-sm-10
+
+    = render layout: 'projects/md_preview', locals: { preview_class: "md-preview", referenced_users: true } do
+      = render 'projects/zen', f: form, attr: :description,
+                               classes: 'note-textarea',
+                               placeholder: "Write a comment or drag your files here...",
+                               supports_slash_commands: !issuable.persisted?
+      = render 'projects/notes/hints', supports_slash_commands: !issuable.persisted?
+      .clearfix
+      .error-alert

app/views/shared/issuable/form/_metadata.html.haml

+- issuable = local_assigns.fetch(:issuable)
+
+- return unless can?(current_user, :"admin_#{issuable.to_ability_name}", issuable.project)
+
+- has_due_date = issuable.has_attribute?(:due_date)
+- has_labels = @labels && @labels.any?
+- form = local_assigns.fetch(:form)
+
+%hr
+.row
+  %div{ class: (has_due_date ? "col-lg-6" : "col-sm-12") }
+    .form-group.issue-assignee
+      = form.label :assignee_id, "Assignee", class: "control-label #{"col-lg-4" if has_due_date}"
+      .col-sm-10{ class: ("col-lg-8" if has_due_date) }
+        .issuable-form-select-holder
+          - if issuable.assignee_id
+            = form.hidden_field :assignee_id
+          = dropdown_tag(user_dropdown_label(issuable.assignee_id, "Assignee"), options: { toggle_class: "js-dropdown-keep-input js-user-search js-issuable-form-dropdown js-assignee-search", title: "Select assignee", filter: true, dropdown_class: "dropdown-menu-user dropdown-menu-selectable dropdown-menu-assignee js-filter-submit",
+            placeholder: "Search assignee", data: { first_user: current_user.try(:username), null_user: true, current_user: true, project_id: issuable.project.try(:id), selected: issuable.assignee_id, field_name: "#{issuable.class.model_name.param_key}[assignee_id]", default_label: "Assignee"} })
+    .form-group.issue-milestone
+      = form.label :milestone_id, "Milestone", class: "control-label #{"col-lg-4" if has_due_date}"
+      .col-sm-10{ class: ("col-lg-8" if has_due_date) }
+        .issuable-form-select-holder
+          = render "shared/issuable/milestone_dropdown", selected: issuable.milestone, name: "#{issuable.class.model_name.param_key}[milestone_id]", show_any: false, show_upcoming: false, extra_class: "js-issuable-form-dropdown js-dropdown-keep-input", dropdown_title: "Select milestone"
+    .form-group
+      - has_labels = @labels && @labels.any?
+      = form.label :label_ids, "Labels", class: "control-label #{"col-lg-4" if has_due_date}"
+      = form.hidden_field :label_ids, multiple: true, value: ''
+      .col-sm-10{ class: "#{"col-lg-8" if has_due_date} #{'issuable-form-padding-top' if !has_labels}" }
+        .issuable-form-select-holder
+          = render "shared/issuable/label_dropdown", classes: ["js-issuable-form-dropdown"], selected: issuable.labels, data_options: { field_name: "#{issuable.class.model_name.param_key}[label_ids][]", show_any: false}, dropdown_title: "Select label"
+  - if has_due_date
+    .col-lg-6
+      .form-group
+        = form.label :due_date, "Due date", class: "control-label"
+        .col-sm-10
+          .issuable-form-select-holder
+            = form.text_field :due_date, id: "issuable-due-date", class: "datepicker form-control", placeholder: "Select due date"