# All files / src/app/ceph/pool/erasure-code-profile-form erasure-code-profile-form.component.ts

98.18% Statements 108/110
82.35% Branches 28/34
95.65% Functions 22/23
97.98% Lines 97/99

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     import { Component, EventEmitter, OnInit, Output } from '@angular/core';
    import { Validators } from '@angular/forms';

    import { I18n } from '@ngx-translate/i18n-polyfill';
    import { BsModalRef } from 'ngx-bootstrap/modal';

    import { ErasureCodeProfileService } from '../../../shared/api/erasure-code-profile.service';
    import { ActionLabelsI18n } from '../../../shared/constants/app.constants';
    import { CdFormBuilder } from '../../../shared/forms/cd-form-builder';
    import { CdFormGroup } from '../../../shared/forms/cd-form-group';
    import { CdValidators } from '../../../shared/forms/cd-validators';
    import { ErasureCodeProfile } from '../../../shared/models/erasure-code-profile';
    import { FinishedTask } from '../../../shared/models/finished-task';
    import { TaskWrapperService } from '../../../shared/services/task-wrapper.service';

    @Component({
      selector: 'cd-erasure-code-profile-form',
      template: require('./erasure-code-profile-form.component.html'),
      styles: []
    })
    export class ErasureCodeProfileFormComponent implements OnInit {
      @Output()
      submitAction = new EventEmitter();

      form: CdFormGroup;
      failureDomains: string[];
      plugins: string[];
      names: string[];
      techniques: string[];
      requiredControls: string[] = [];
      devices: string[] = [];
      tooltips = this.ecpService.formTooltips;

      PLUGIN = {
        LRC: 'lrc', // Locally Repairable Erasure Code
        SHEC: 'shec', // Shingled Erasure Code
        JERASURE: 'jerasure', // default
        ISA: 'isa' // Intel Storage Acceleration
      };
      plugin = this.PLUGIN.JERASURE;
      action: string;
      resource: string;

      constructor(
        private formBuilder: CdFormBuilder,
        public bsModalRef: BsModalRef,
        private taskWrapper: TaskWrapperService,
        private ecpService: ErasureCodeProfileService,
        private i18n: I18n,
        public actionLabels: ActionLabelsI18n
      ) {
        this.action = this.actionLabels.CREATE;
        this.resource = this.i18n('EC Profile');
        this.createForm();
        this.setJerasureDefaults();
      }

      createForm() {
        this.form = this.formBuilder.group({
          name: [
            null,
            [
              Validators.required,
              Validators.pattern('[A-Za-z0-9_-]+'),
              CdValidators.custom(
                'uniqueName',
                (value) => this.names && this.names.indexOf(value) !== -1
              )
            ]
          ],
          plugin: [this.PLUGIN.JERASURE, [Validators.required]],
          k: [1], // Will be replaced by plugin defaults
          m: [1], // Will be replaced by plugin defaults
          crushFailureDomain: ['host'],
          crushRoot: ['default'], // default for all - is a list possible???
          crushDeviceClass: [''], // set none to empty at submit - get list from configs?
          directory: [''],
          // Only for 'jerasure' and 'isa' use
          technique: ['reed_sol_van'],
          // Only for 'jerasure' use
          packetSize: [2048, [Validators.min(1)]],
          // Only for 'lrc' use
          l: [1, [Validators.required, Validators.min(1)]],
          crushLocality: [''], // set to none at the end (same list as for failure domains)
          // Only for 'shec' use
          c: [1, [Validators.required, Validators.min(1)]]
        });
        this.form.get('plugin').valueChanges.subscribe((plugin) => this.onPluginChange(plugin));
      }

      onPluginChange(plugin) {
        this.plugin = plugin;
        if (plugin === this.PLUGIN.JERASURE) {
          this.setJerasureDefaults();
        } else if (plugin === this.PLUGIN.LRC) {
          this.setLrcDefaults();
        } else if (plugin === this.PLUGIN.ISA) {
          this.setIsaDefaults();
        } else if (plugin === this.PLUGIN.SHEC) {
          this.setShecDefaults();
        }
      }

      private setNumberValidators(name: string, required: boolean) {
        const validators = [Validators.min(1)];
        if (required) {
          validators.push(Validators.required);
        }
        this.form.get(name).setValidators(validators);
      }

      private setKMValidators(required: boolean) {
        ['k', 'm'].forEach((name) => this.setNumberValidators(name, required));
      }

      private setJerasureDefaults() {
        this.requiredControls = ['k', 'm'];
        this.setDefaults({
          k: 4,
          m: 2
        });
        this.setKMValidators(true);
        this.techniques = [
          'reed_sol_van',
          'reed_sol_r6_op',
          'cauchy_orig',
          'cauchy_good',
          'liberation',
          'blaum_roth',
          'liber8tion'
        ];
      }

      private setLrcDefaults() {
        this.requiredControls = ['k', 'm', 'l'];
        this.setKMValidators(true);
        this.setNumberValidators('l', true);
        this.setDefaults({
          k: 4,
          m: 2,
          l: 3
        });
      }

      private setIsaDefaults() {
        this.requiredControls = [];
        this.setKMValidators(false);
        this.setDefaults({
          k: 7,
          m: 3
        });
        this.techniques = ['reed_sol_van', 'cauchy'];
      }

      private setShecDefaults() {
        this.requiredControls = [];
        this.setKMValidators(false);
        this.setDefaults({
          k: 4,
          m: 3,
          c: 2
        });
      }

      private setDefaults(defaults: object) {
        Object.keys(defaults).forEach((controlName) => {
          if (this.form.get(controlName).pristine) {
            this.form.silentSet(controlName, defaults[controlName]);
          }
        });
      }

      ngOnInit() {
        this.ecpService
          .getInfo()
          .subscribe(
            ({
              failure_domains,
              plugins,
              names,
              directory,
              devices
            }: {
              failure_domains: string[];
              plugins: string[];
              names: string[];
              directory: string;
              devices: string[];
            }) => {
              this.failureDomains = failure_domains;
              this.plugins = plugins;
              this.names = names;
              this.devices = devices;
              this.form.silentSet('directory', directory);
            }
          );
      }

      private createJson() {
        const pluginControls = {
          technique: [this.PLUGIN.ISA, this.PLUGIN.JERASURE],
          packetSize: [this.PLUGIN.JERASURE],
          l: [this.PLUGIN.LRC],
          crushLocality: [this.PLUGIN.LRC],
          c: [this.PLUGIN.SHEC]
        };
        const ecp = new ErasureCodeProfile();
        const plugin = this.form.getValue('plugin');
        Object.keys(this.form.controls)
          .filter((name) => {
            const pluginControl = pluginControls[name];
            const control = this.form.get(name);
            const usable = (pluginControl && pluginControl.includes(plugin)) || !pluginControl;
            return (
              usable &&
              (control.dirty || this.requiredControls.includes(name)) &&
              this.form.getValue(name)
            );
          })
          .forEach((name) => {
            this.extendJson(name, ecp);
          });
        return ecp;
      }

      private extendJson(name: string, ecp: ErasureCodeProfile) {
        const differentApiAttributes = {
          crushFailureDomain: 'crush-failure-domain',
          crushRoot: 'crush-root',
          crushDeviceClass: 'crush-device-class',
          packetSize: 'packetsize',
          crushLocality: 'crush-locality'
        };
        ecp[differentApiAttributes[name] || name] = this.form.getValue(name);
      }

      onSubmit() {
        if (this.form.invalid) {
          this.form.setErrors({ cdSubmitButton: true });
          return;
        }
        const profile = this.createJson();
        this.taskWrapper
          .wrapTaskAroundCall({
            task: new FinishedTask('ecp/create', { name: profile.name }),
            call: this.ecpService.create(profile)
          })
          .subscribe(
            undefined,
            () => {
              this.form.setErrors({ cdSubmitButton: true });
            },
            () => {
              this.bsModalRef.hide();
              this.submitAction.emit(profile);
            }
          );
      }
    }