# All files / src/app/core/auth/role-form role-form.component.ts

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     import { Component, OnInit, TemplateRef, ViewChild } from '@angular/core';
    import { FormControl, Validators } from '@angular/forms';
    import { ActivatedRoute, Router } from '@angular/router';

    import { I18n } from '@ngx-translate/i18n-polyfill';
    import * as _ from 'lodash';
    import { BsModalRef } from 'ngx-bootstrap/modal';
    import { forkJoin as observableForkJoin } from 'rxjs';

    import { RoleService } from '../../../shared/api/role.service';
    import { ScopeService } from '../../../shared/api/scope.service';
    import { ActionLabelsI18n } from '../../../shared/constants/app.constants';
    import { NotificationType } from '../../../shared/enum/notification-type.enum';
    import { CdFormGroup } from '../../../shared/forms/cd-form-group';
    import { CdValidators } from '../../../shared/forms/cd-validators';
    import { CdTableColumn } from '../../../shared/models/cd-table-column';
    import { NotificationService } from '../../../shared/services/notification.service';
    import { RoleFormMode } from './role-form-mode.enum';
    import { RoleFormModel } from './role-form.model';

    @Component({
      selector: 'cd-role-form',
      template: require('./role-form.component.html'),
      styles: []
    })
    export class RoleFormComponent implements OnInit {
      @ViewChild('headerPermissionCheckboxTpl')
      headerPermissionCheckboxTpl: TemplateRef<any>;
      @ViewChild('cellScopeCheckboxTpl')
      cellScopeCheckboxTpl: TemplateRef<any>;
      @ViewChild('cellPermissionCheckboxTpl')
      cellPermissionCheckboxTpl: TemplateRef<any>;

      modalRef: BsModalRef;

      roleForm: CdFormGroup;
      response: RoleFormModel;

      columns: CdTableColumn[];
      scopes: Array<string> = [];
      scopes_permissions: Array<any> = [];

      roleFormMode = RoleFormMode;
      mode: RoleFormMode;

      action: string;
      resource: string;

      constructor(
        private route: ActivatedRoute,
        private router: Router,
        private roleService: RoleService,
        private scopeService: ScopeService,
        private notificationService: NotificationService,
        private i18n: I18n,
        public actionLabels: ActionLabelsI18n
      ) {
        this.resource = this.i18n('role');
        this.createForm();
        this.listenToChanges();
      }

      createForm() {
        this.roleForm = new CdFormGroup({
          name: new FormControl('', {
            validators: [Validators.required],
            asyncValidators: [CdValidators.unique(this.roleService.exists, this.roleService)]
          }),
          description: new FormControl(''),
          scopes_permissions: new FormControl({})
        });
      }

      ngOnInit() {
        this.columns = [
          {
            prop: 'scope',
            name: this.i18n('All'),
            flexGrow: 2,
            cellTemplate: this.cellScopeCheckboxTpl,
            headerTemplate: this.headerPermissionCheckboxTpl
          },
          {
            prop: 'read',
            name: this.i18n('Read'),
            flexGrow: 1,
            cellClass: 'text-center',
            cellTemplate: this.cellPermissionCheckboxTpl,
            headerTemplate: this.headerPermissionCheckboxTpl
          },
          {
            prop: 'create',
            name: this.i18n('Create'),
            flexGrow: 1,
            cellClass: 'text-center',
            cellTemplate: this.cellPermissionCheckboxTpl,
            headerTemplate: this.headerPermissionCheckboxTpl
          },
          {
            prop: 'update',
            name: this.i18n('Update'),
            flexGrow: 1,
            cellClass: 'text-center',
            cellTemplate: this.cellPermissionCheckboxTpl,
            headerTemplate: this.headerPermissionCheckboxTpl
          },
          {
            prop: 'delete',
            name: this.i18n('Delete'),
            flexGrow: 1,
            cellClass: 'text-center',
            cellTemplate: this.cellPermissionCheckboxTpl,
            headerTemplate: this.headerPermissionCheckboxTpl
          }
        ];
        if (this.router.url.startsWith('/user-management/roles/edit')) {
          this.mode = this.roleFormMode.editing;
          this.action = this.actionLabels.EDIT;
        } else {
          this.action = this.actionLabels.CREATE;
        }
        if (this.mode === this.roleFormMode.editing) {
          this.initEdit();
        } else {
          this.initCreate();
        }
      }

      initCreate() {
        // Load the scopes and initialize the default scopes/permissions data.
        this.scopeService.list().subscribe((scopes: Array<string>) => {
          this.scopes = scopes;
          this.roleForm.get('scopes_permissions').setValue({});
        });
      }

      initEdit() {
        // Disable the 'Name' input field.
        this.roleForm.get('name').disable();
        // Load the scopes and the role data.
        this.route.params.subscribe((params: { name: string }) => {
          const observables = [];
          observables.push(this.scopeService.list());
          observables.push(this.roleService.get(params.name));
          observableForkJoin(observables).subscribe((resp: any[]) => {
            this.scopes = resp[0];
            ['name', 'description', 'scopes_permissions'].forEach((key) =>
              this.roleForm.get(key).setValue(resp[1][key])
            );
          });
        });
      }

      listenToChanges() {
        // Create/Update the data which is used by the data table to display the
        // scopes/permissions every time the form field value has been changed.
        this.roleForm.get('scopes_permissions').valueChanges.subscribe((value) => {
          const scopes_permissions = [];
          _.each(this.scopes, (scope) => {
            // Set the defaults values.
            const scope_permission = { read: false, create: false, update: false, delete: false };
            scope_permission['scope'] = scope;
            // Apply settings from the given value if they exist.
            if (scope in value) {
              _.each(value[scope], (permission) => {
                scope_permission[permission] = true;
              });
            }
            scopes_permissions.push(scope_permission);
          });
          this.scopes_permissions = scopes_permissions;
        });
      }

      /**
       * Checks if the specified row checkbox needs to be rendered as checked.
       * @param {string} scope The scope to be checked, e.g. 'cephfs', 'grafana',
       *   'osd', 'pool' ...
       * @return Returns true if all permissions (read, create, update, delete)
       *   are checked for the specified scope, otherwise false.
       */
      isRowChecked(scope: string) {
        const scope_permission = _.find(this.scopes_permissions, (o) => {
          return o['scope'] === scope;
        });
        if (_.isUndefined(scope_permission)) {
          return false;
        }
        return (
          scope_permission['read'] &&
          scope_permission['create'] &&
          scope_permission['update'] &&
          scope_permission['delete']
        );
      }

      /**
       * Checks if the specified header checkbox needs to be rendered as checked.
       * @param {string} property The property/permission (read, create,
       *   update, delete) to be checked. If 'scope' is given, all permissions
       *   are checked.
       * @return Returns true if specified property/permission is selected
       *   for all scopes, otherwise false.
       */
      isHeaderChecked(property: string) {
        let permissions = [property];
        if ('scope' === property) {
          permissions = ['read', 'create', 'update', 'delete'];
        }
        return permissions.every((permission) => {
          return this.scopes_permissions.every((scope_permission) => {
            return scope_permission[permission];
          });
        });
      }

      onClickCellCheckbox(scope: string, property: string, Eevent: Event = null) {
        // Use a copy of the form field data to do not trigger the redrawing of the
        // data table with every change.
        const scopes_permissions = _.cloneDeep(this.roleForm.getValue('scopes_permissions'));
        let permissions = [property];
        if ('scope' === property) {
          permissions = ['read', 'create', 'update', 'delete'];
        }
        if (!(scope in scopes_permissions)) {
          scopes_permissions[scope] = [];
        }
        // Add or remove the given permission(s) depending on the click event or if no
        // click event is given then add/remove them if they are absent/exist.
        if (
          (event && event.target['checked']) ||
          !_.isEqual(permissions.sort(), _.intersection(scopes_permissions[scope], permissions).sort())
        ) {
          scopes_permissions[scope] = _.union(scopes_permissions[scope], permissions);
        } else {
          scopes_permissions[scope] = _.difference(scopes_permissions[scope], permissions);
          if (_.isEmpty(scopes_permissions[scope])) {
            _.unset(scopes_permissions, scope);
          }
        }
        this.roleForm.get('scopes_permissions').setValue(scopes_permissions);
      }

      onClickHeaderCheckbox(property: 'scope' | 'read' | 'create' | 'update' | 'delete', event: Event) {
        // Use a copy of the form field data to do not trigger the redrawing of the
        // data table with every change.
        const scopes_permissions = _.cloneDeep(this.roleForm.getValue('scopes_permissions'));
        let permissions = [property];
        if ('scope' === property) {
          permissions = ['read', 'create', 'update', 'delete'];
        }
        _.each(permissions, (permission) => {
          _.each(this.scopes, (scope) => {
            if (event.target['checked']) {
              scopes_permissions[scope] = _.union(scopes_permissions[scope], [permission]);
            } else {
              scopes_permissions[scope] = _.difference(scopes_permissions[scope], [permission]);
              if (_.isEmpty(scopes_permissions[scope])) {
                _.unset(scopes_permissions, scope);
              }
            }
          });
        });
        this.roleForm.get('scopes_permissions').setValue(scopes_permissions);
      }

      getRequest(): RoleFormModel {
        const roleFormModel = new RoleFormModel();
        ['name', 'description', 'scopes_permissions'].forEach(
          (key) => (roleFormModel[key] = this.roleForm.get(key).value)
        );
        return roleFormModel;
      }

      createAction() {
        const roleFormModel = this.getRequest();
        this.roleService.create(roleFormModel).subscribe(
          () => {
            this.notificationService.show(
              NotificationType.success,
              this.i18n(`Created role '{{role_name}}'`, { role_name: roleFormModel.name })
            );
            this.router.navigate(['/user-management/roles']);
          },
          () => {
            this.roleForm.setErrors({ cdSubmitButton: true });
          }
        );
      }

      editAction() {
        const roleFormModel = this.getRequest();
        this.roleService.update(roleFormModel).subscribe(
          () => {
            this.notificationService.show(
              NotificationType.success,
              this.i18n(`Updated role '{{role_name}}'`, { role_name: roleFormModel.name })
            );
            this.router.navigate(['/user-management/roles']);
          },
          () => {
            this.roleForm.setErrors({ cdSubmitButton: true });
          }
        );
      }

      submit() {
        if (this.mode === this.roleFormMode.editing) {
          this.editAction();
        } else {
          this.createAction();
        }
      }
    }