# All files / src/app/ceph/cluster/mgr-modules/mgr-module-list mgr-module-list.component.ts

76.92% Statements 50/65
56% Branches 14/25
45% Functions 9/20
75.41% Lines 46/61

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     import { Component, ViewChild } from '@angular/core';

    import { I18n } from '@ngx-translate/i18n-polyfill';
    import { BlockUI, NgBlockUI } from 'ng-block-ui';
    import { timer as observableTimer } from 'rxjs';

    import { MgrModuleService } from '../../../../shared/api/mgr-module.service';
    import { TableComponent } from '../../../../shared/datatable/table/table.component';
    import { CellTemplate } from '../../../../shared/enum/cell-template.enum';
    import { CdTableAction } from '../../../../shared/models/cd-table-action';
    import { CdTableColumn } from '../../../../shared/models/cd-table-column';
    import { CdTableFetchDataContext } from '../../../../shared/models/cd-table-fetch-data-context';
    import { CdTableSelection } from '../../../../shared/models/cd-table-selection';
    import { Permission } from '../../../../shared/models/permissions';
    import { AuthStorageService } from '../../../../shared/services/auth-storage.service';
    import { NotificationService } from '../../../../shared/services/notification.service';

    @Component({
      selector: 'cd-mgr-module-list',
      template: require('./mgr-module-list.component.html'),
      styles: []
    })
    export class MgrModuleListComponent {
      @ViewChild(TableComponent)
      table: TableComponent;
      @BlockUI()
      blockUI: NgBlockUI;

      permission: Permission;
      tableActions: CdTableAction[];
      columns: CdTableColumn[] = [];
      modules: object[] = [];
      selection: CdTableSelection = new CdTableSelection();

      constructor(
        private authStorageService: AuthStorageService,
        private mgrModuleService: MgrModuleService,
        private notificationService: NotificationService,
        private i18n: I18n
      ) {
        this.permission = this.authStorageService.getPermissions().configOpt;
        this.columns = [
          {
            name: this.i18n('Name'),
            prop: 'name',
            flexGrow: 1
          },
          {
            name: this.i18n('Enabled'),
            prop: 'enabled',
            flexGrow: 1,
            cellClass: 'text-center',
            cellTransformation: CellTemplate.checkIcon
          }
        ];
        const getModuleUri = () =>
          this.selection.first() && encodeURIComponent(this.selection.first().name);
        this.tableActions = [
          {
            name: this.i18n('Edit'),
            permission: 'update',
            disable: () => {
              if (!this.selection.hasSelection) {
                return true;
              }
              // Disable the 'edit' button when the module has no options.
              return Object.values(this.selection.first().options).length === 0;
            },
            routerLink: () => `/mgr-modules/edit/${getModuleUri()}`,
            icon: 'fa-pencil'
          },
          {
            name: this.i18n('Enable'),
            permission: 'update',
            click: () => this.updateModuleState(),
            disable: () => this.isTableActionDisabled('enabled'),
            icon: 'fa-play'
          },
          {
            name: this.i18n('Disable'),
            permission: 'update',
            click: () => this.updateModuleState(),
            disable: () => this.isTableActionDisabled('disabled'),
            icon: 'fa-stop'
          }
        ];
      }

      getModuleList(context: CdTableFetchDataContext) {
        this.mgrModuleService.list().subscribe(
          (resp: object[]) => {
            this.modules = resp;
          },
          () => {
            context.error();
          }
        );
      }

      updateSelection(selection: CdTableSelection) {
        this.selection = selection;
      }

      /**
       * Check if the table action is disabled.
       * @param state The expected module state, e.g. ``enabled`` or ``disabled``.
       * @returns If the specified state is validated to true or no selection is
       *   done, then ``true`` is returned, otherwise ``false``.
       */
      isTableActionDisabled(state: 'enabled' | 'disabled') {
        if (!this.selection.hasSelection) {
          return true;
        }
        // Make sure the user can't modify the run state of the 'Dashboard' module.
        // This check is only done in the UI because the REST API should still be
        // able to do so.
        if (this.selection.first().name === 'dashboard') {
          return true;
        }
        switch (state) {
          case 'enabled':
            return this.selection.first().enabled;
          case 'disabled':
            return !this.selection.first().enabled;
        }
      }

      /**
       * Update the Ceph Mgr module state to enabled or disabled.
       */
      updateModuleState() {
        if (!this.selection.hasSelection) {
          return;
        }

        let $obs;
        const fnWaitUntilReconnected = () => {
          observableTimer(2000).subscribe(() => {
            // Trigger an API request to check if the connection is
            // re-established.
            this.mgrModuleService.list().subscribe(
              () => {
                // Resume showing the notification toasties.
                this.notificationService.suspendToasties(false);
                // Unblock the whole UI.
                this.blockUI.stop();
                // Reload the data table content.
                this.table.refreshBtn();
              },
              () => {
                fnWaitUntilReconnected();
              }
            );
          });
        };

        // Note, the Ceph Mgr is always restarted when a module
        // is enabled/disabled.
        const module = this.selection.first();
        if (module.enabled) {
          $obs = this.mgrModuleService.disable(module.name);
        } else {
          $obs = this.mgrModuleService.enable(module.name);
        }
        $obs.subscribe(
          () => {},
          () => {
            // Suspend showing the notification toasties.
            this.notificationService.suspendToasties(true);
            // Block the whole UI to prevent user interactions until
            // the connection to the backend is reestablished
            this.blockUI.start(this.i18n('Reconnecting, please wait ...'));
            fnWaitUntilReconnected();
          }
        );
      }
    }