@clr/angular
Version:
Angular components for Clarity
359 lines • 37.6 kB
JavaScript
/*
* Copyright (c) 2016-2023 VMware, Inc. All Rights Reserved.
* This software is released under MIT license.
* The full license information can be found in LICENSE in the root directory of this project.
*/
import { Injectable } from '@angular/core';
import { Subject } from 'rxjs';
import * as i0 from "@angular/core";
/**
* PageCollectionService manages the collection of pages assigned to the wizard and offers
* a number of functions useful across the wizards providers and subcomponents -- all related
* to essentially lookups on the collection of pages.
*
* The easiest way to access PageCollectionService is via the wizard. The
* following example would allow you to access your instance of the wizard from your host
* component and thereby access the page collection via YourHostComponent.wizard.pageCollection.
*
* @example
* <clr-wizard #wizard ...>
*
* @example
* export class YourHostComponent {
* @ViewChild("wizard") wizard: Wizard;
* ...
* }
*
* The heart of the page collection is the query list of pages, which it is assigned as a
* reference to the Wizard.pages QueryList when the wizard is created.
*
*/
export class PageCollectionService {
constructor() {
/**
*
* @memberof PageCollectionService
*/
this._pagesReset = new Subject();
}
/**
* Converts the PageCollectionService.pages QueryList to an array and returns it.
*
* Useful for many instances when you would prefer a QueryList to act like an array.
*
* @memberof PageCollectionService
*/
get pagesAsArray() {
return this.pages ? this.pages.toArray() : [];
}
/**
* Returns the length of the pages query list.
*
* @memberof PageCollectionService
*/
get pagesCount() {
return this.pages ? this.pages.length : 0;
}
/**
* Returns the next-to-last page in the query list of pages. Operates as a getter
* so that it isn't working with stale data.
*
* @memberof PageCollectionService
*/
get penultimatePage() {
const pageCount = this.pagesCount;
if (pageCount < 2) {
return null;
}
return this.pagesAsArray[pageCount - 2];
}
/**
* Returns the last page in the query list of pages. Operates as a getter
* so that it isn't working with stale data.
*
* @memberof PageCollectionService
*/
get lastPage() {
const pageCount = this.pagesCount;
if (pageCount < 1) {
return null;
}
return this.pagesAsArray[pageCount - 1];
}
/**
* Returns the first page in the query list of pages. Operates as a getter
* so that it isn't working with stale data.
*
* @memberof PageCollectionService
*/
get firstPage() {
if (!this.pagesCount) {
return null;
}
return this.pagesAsArray[0];
}
/**
* An observable that the navigation service listens to in order to know when
* the page collection completed states have been reset to false so that way it
* can also reset the navigation to make the first page in the page collection
* current/active.
*
* @memberof PageCollectionService
*/
get pagesReset() {
return this._pagesReset.asObservable();
}
/**
* Used mostly internally, but accepts a string ID and returns a ClrWizardPage
* object that matches the ID passed. Note that IDs here should include the prefix
* "clr-wizard-page-".
*
* Returns the next-to-last page in the query list of pages. Operates as a getter
* so that it isn't working with stale data.
*
* @memberof PageCollectionService
*/
getPageById(id) {
const foundPages = this.pages.filter((page) => id === page.id);
return this.checkResults(foundPages, id);
}
/**
* Accepts s number as a parameter and treats that number as the index of the page
* you're looking for in the collection of pages. Returns a wizard page object.
*
* @memberof PageCollectionService
*/
getPageByIndex(index) {
const pageCount = this.pagesCount;
const pagesLastIndex = pageCount > 1 ? pageCount - 1 : 0;
if (index < 0) {
throw new Error('Cannot retrieve page with index of ' + index);
}
if (index > pagesLastIndex) {
throw new Error('Page index is greater than length of pages array.');
}
return this.pagesAsArray[index];
}
/**
* Takes a wizard page object as a parameter and returns its index in the
* collection of pages.
*
* @memberof PageCollectionService
*/
getPageIndex(page) {
const index = this.pagesAsArray.indexOf(page);
if (index < 0) {
throw new Error('Requested page cannot be found in collection of pages.');
}
return index;
}
/**
* Accepts two numeric indexes and returns an array of wizard page objects that include
* all wizard pages in the page collection from the first index to the second.
*
* @memberof PageCollectionService
*/
pageRange(start, end) {
let pages = [];
if (start < 0 || end < 0) {
return [];
}
if (start === null || typeof start === 'undefined' || isNaN(start)) {
return [];
}
if (end === null || typeof end === 'undefined' || isNaN(end)) {
return [];
}
if (end > this.pagesCount) {
end = this.pagesCount;
}
pages = this.pagesAsArray;
if (end - start === 0) {
// just return the one page they want
return [this.getPageByIndex(start)];
}
// slice end does not include item referenced by end index, which is weird for users
// incrementing end index here to correct that so users and other methods
// don't have to think about it
end = end + 1;
// slice does not return the last one in the range but it does include the first one
// does not modify original array
return pages.slice(start, end);
}
/**
* Accepts two wizard page objects and returns those page objects with all other page
* objects between them in the page collection. It doesn't care which page is ahead of the
* other in the parameters. It will be smart enough to figure that out on its own.
*
* @memberof PageCollectionService
*/
getPageRangeFromPages(page, otherPage) {
const pageIndex = this.getPageIndex(page);
const otherPageIndex = this.getPageIndex(otherPage);
let startIndex;
let endIndex;
if (pageIndex <= otherPageIndex) {
startIndex = pageIndex;
endIndex = otherPageIndex;
}
else {
startIndex = otherPageIndex;
endIndex = pageIndex;
}
return this.pageRange(startIndex, endIndex);
}
/**
* Takes a wizard page object as a parameter and returns the wizard page object of
* the page immediately before it in the page collection. Returns null if there is
* no page before the page it is passed.
*
* @memberof PageCollectionService
*/
getPreviousPage(page) {
const myPageIndex = this.getPageIndex(page);
const previousPageIndex = myPageIndex - 1;
if (previousPageIndex < 0) {
return null;
}
return this.getPageByIndex(previousPageIndex);
}
/**
* Accepts a wizard page object as a parameter and returns a Boolean that says if
* the page you sent it is complete.
*
* @memberof PageCollectionService
*/
previousPageIsCompleted(page) {
if (!page) {
return false;
}
const previousPage = this.getPreviousPage(page);
if (null === previousPage) {
// page is the first page. no previous page.
return true;
}
return previousPage.completed;
}
/**
* Takes a wizard page object as a parameter and returns the wizard page object of
* the page immediately after it in the page collection. Returns null if there is
* no page after the page it is passed.
*
* @memberof PageCollectionService
*/
getNextPage(page) {
const myPageIndex = this.getPageIndex(page);
const nextPageIndex = myPageIndex + 1;
if (nextPageIndex >= this.pagesAsArray.length) {
return null;
}
return this.getPageByIndex(nextPageIndex);
}
/**
* Takes a wizard page object as a parameter and generates a step item id from the
* page ID. Returns the generated step item ID as a string.
*
* @memberof PageCollectionService
*/
getStepItemIdForPage(page) {
const pageId = page.id;
const pageIdParts = pageId.split('-').reverse();
pageIdParts[1] = 'step';
return pageIdParts.reverse().join('-');
}
/**
* Generally only used internally to mark that a specific page has been "committed".
* This involves marking the page complete and firing the ClrWizardPage.onCommit
* (clrWizardPageOnCommit) output. Takes the wizard page object that you intend to
* mark completed as a parameter.
*
* @memberof PageCollectionService
*/
commitPage(page) {
const pageHasOverrides = page.stopNext || page.preventDefault;
page.completed = true;
if (!pageHasOverrides) {
// prevent loop of event emission; alternate flows work off
// of event emitters this is how they break that cycle.
page.onCommit.emit(page.id);
}
}
/**
* Sets all completed states of the pages in the page collection to false and
* notifies the navigation service to likewise reset the navigation.
*
* @memberof PageCollectionService
*/
reset() {
this.pagesAsArray.forEach((page) => {
page.completed = false;
});
this._pagesReset.next(true);
}
/**
* Rolls through all the pages in the page collection to make sure there are no
* incomplete pages sandwiched between completed pages in the workflow. Identifies
* the first incomplete page index and sets all pages behind it to a completed
* state of false.
*
* @memberof PageCollectionService
*/
updateCompletedStates() {
const firstIncompleteIndex = this.findFirstIncompletePageIndex();
if (firstIncompleteIndex === this.pagesAsArray.length - 1) {
// all complete no need to do anything
return;
}
this.pagesAsArray.forEach((page, index) => {
if (index > firstIncompleteIndex) {
page.completed = false;
}
});
}
/**
* Retrieves the index of the first incomplete page in the page collection.
*
* @memberof PageCollectionService
*/
findFirstIncompletePageIndex() {
let returnIndex = null;
this.pagesAsArray.forEach((page, index) => {
if (null === returnIndex && false === page.completed) {
returnIndex = index;
}
});
// fallthrough, all completed, return last page
if (null === returnIndex) {
returnIndex = this.pagesCount - 1;
}
return returnIndex;
}
findFirstIncompletePage() {
const myIncompleteIndex = this.findFirstIncompletePageIndex();
return this.pagesAsArray[myIncompleteIndex];
}
/**
* Consolidates guard logic that prevents a couple of unfortunate edge cases with
* look ups on the collection of pages.
*
* @memberof PageCollectionService
*/
checkResults(results, requestedPageId) {
const foundPagesCount = results.length || 0;
if (foundPagesCount > 1) {
throw new Error('More than one page has the requested id ' + requestedPageId + '.');
}
else if (foundPagesCount < 1) {
throw new Error('No page can be found with the id ' + requestedPageId + '.');
}
else {
return results[0];
}
}
}
PageCollectionService.ɵfac = i0.ɵɵngDeclareFactory({ minVersion: "12.0.0", version: "15.2.2", ngImport: i0, type: PageCollectionService, deps: [], target: i0.ɵɵFactoryTarget.Injectable });
PageCollectionService.ɵprov = i0.ɵɵngDeclareInjectable({ minVersion: "12.0.0", version: "15.2.2", ngImport: i0, type: PageCollectionService });
i0.ɵɵngDeclareClassMetadata({ minVersion: "12.0.0", version: "15.2.2", ngImport: i0, type: PageCollectionService, decorators: [{
type: Injectable
}] });
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* Copyright (c) 2016-2023 VMware, Inc. All Rights Reserved.\n * This software is released under MIT license.\n * The full license information can be found in LICENSE in the root directory of this project.\n */\n\nimport { Injectable, QueryList } from '@angular/core';\nimport { Observable } from 'rxjs';\nimport { Subject } from 'rxjs';\n\nimport { ClrWizardPage } from '../wizard-page';\n\n/**\n * PageCollectionService manages the collection of pages assigned to the wizard and offers\n * a number of functions useful across the wizards providers and subcomponents -- all related\n * to essentially lookups on the collection of pages.\n *\n * The easiest way to access PageCollectionService is via the wizard. The\n * following example would allow you to access your instance of the wizard from your host\n * component and thereby access the page collection via YourHostComponent.wizard.pageCollection.\n *\n * @example\n * <clr-wizard #wizard ...>\n *\n * @example\n * export class YourHostComponent {\n *   @ViewChild(\"wizard\") wizard: Wizard;\n *   ...\n * }\n *\n * The heart of the page collection is the query list of pages, which it is assigned as a\n * reference to the Wizard.pages QueryList when the wizard is created.\n *\n */\n@Injectable()\nexport class PageCollectionService {\n  /**\n   * A reference to the Wizard.pages QueryList.\n   *\n   * Populated when the wizard is created.\n   *\n   * @memberof PageCollectionService\n   */\n  pages: QueryList<ClrWizardPage>;\n\n  /**\n   *\n   * @memberof PageCollectionService\n   */\n  private _pagesReset = new Subject<boolean>();\n\n  /**\n   * Converts the PageCollectionService.pages QueryList to an array and returns it.\n   *\n   * Useful for many instances when you would prefer a QueryList to act like an array.\n   *\n   * @memberof PageCollectionService\n   */\n  get pagesAsArray(): ClrWizardPage[] {\n    return this.pages ? this.pages.toArray() : [];\n  }\n\n  /**\n   * Returns the length of the pages query list.\n   *\n   * @memberof PageCollectionService\n   */\n  get pagesCount(): number {\n    return this.pages ? this.pages.length : 0;\n  }\n\n  /**\n   * Returns the next-to-last page in the query list of pages. Operates as a getter\n   * so that it isn't working with stale data.\n   *\n   * @memberof PageCollectionService\n   */\n  get penultimatePage(): ClrWizardPage {\n    const pageCount = this.pagesCount;\n\n    if (pageCount < 2) {\n      return null;\n    }\n\n    return this.pagesAsArray[pageCount - 2];\n  }\n\n  /**\n   * Returns the last page in the query list of pages. Operates as a getter\n   * so that it isn't working with stale data.\n   *\n   * @memberof PageCollectionService\n   */\n  get lastPage(): ClrWizardPage {\n    const pageCount = this.pagesCount;\n\n    if (pageCount < 1) {\n      return null;\n    }\n\n    return this.pagesAsArray[pageCount - 1];\n  }\n\n  /**\n   * Returns the first page in the query list of pages. Operates as a getter\n   * so that it isn't working with stale data.\n   *\n   * @memberof PageCollectionService\n   */\n  get firstPage(): ClrWizardPage {\n    if (!this.pagesCount) {\n      return null;\n    }\n\n    return this.pagesAsArray[0];\n  }\n\n  /**\n   * An observable that the navigation service listens to in order to know when\n   * the page collection completed states have been reset to false so that way it\n   * can also reset the navigation to make the first page in the page collection\n   * current/active.\n   *\n   * @memberof PageCollectionService\n   */\n  get pagesReset(): Observable<boolean> {\n    return this._pagesReset.asObservable();\n  }\n\n  /**\n   * Used mostly internally, but accepts a string ID and returns a ClrWizardPage\n   * object that matches the ID passed. Note that IDs here should include the prefix\n   * \"clr-wizard-page-\".\n   *\n   * Returns the next-to-last page in the query list of pages. Operates as a getter\n   * so that it isn't working with stale data.\n   *\n   * @memberof PageCollectionService\n   */\n  getPageById(id: string): ClrWizardPage {\n    const foundPages: ClrWizardPage[] = this.pages.filter((page: ClrWizardPage) => id === page.id);\n    return this.checkResults(foundPages, id);\n  }\n\n  /**\n   * Accepts s number as a parameter and treats that number as the index of the page\n   * you're looking for in the collection of pages. Returns a  wizard page object.\n   *\n   * @memberof PageCollectionService\n   */\n  getPageByIndex(index: number): ClrWizardPage {\n    const pageCount = this.pagesCount;\n    const pagesLastIndex: number = pageCount > 1 ? pageCount - 1 : 0;\n\n    if (index < 0) {\n      throw new Error('Cannot retrieve page with index of ' + index);\n    }\n\n    if (index > pagesLastIndex) {\n      throw new Error('Page index is greater than length of pages array.');\n    }\n\n    return this.pagesAsArray[index];\n  }\n\n  /**\n   * Takes a wizard page object as a parameter and returns its index in the\n   * collection of pages.\n   *\n   * @memberof PageCollectionService\n   */\n  getPageIndex(page: ClrWizardPage): number {\n    const index = this.pagesAsArray.indexOf(page);\n\n    if (index < 0) {\n      throw new Error('Requested page cannot be found in collection of pages.');\n    }\n\n    return index;\n  }\n\n  /**\n   * Accepts two numeric indexes and returns an array of wizard page objects that include\n   * all wizard pages in the page collection from the first index to the second.\n   *\n   * @memberof PageCollectionService\n   */\n  pageRange(start: number, end: number): ClrWizardPage[] {\n    let pages: ClrWizardPage[] = [];\n\n    if (start < 0 || end < 0) {\n      return [];\n    }\n\n    if (start === null || typeof start === 'undefined' || isNaN(start)) {\n      return [];\n    }\n\n    if (end === null || typeof end === 'undefined' || isNaN(end)) {\n      return [];\n    }\n\n    if (end > this.pagesCount) {\n      end = this.pagesCount;\n    }\n\n    pages = this.pagesAsArray;\n\n    if (end - start === 0) {\n      // just return the one page they want\n      return [this.getPageByIndex(start)];\n    }\n\n    // slice end does not include item referenced by end index, which is weird for users\n    // incrementing end index here to correct that so users and other methods\n    // don't have to think about it\n    end = end + 1;\n\n    // slice does not return the last one in the range but it does include the first one\n    // does not modify original array\n    return pages.slice(start, end);\n  }\n\n  /**\n   * Accepts two wizard page objects and returns those page objects with all other page\n   * objects between them in the page collection. It doesn't care which page is ahead of the\n   * other in the parameters. It will be smart enough to figure that out  on its own.\n   *\n   * @memberof PageCollectionService\n   */\n  getPageRangeFromPages(page: ClrWizardPage, otherPage: ClrWizardPage): ClrWizardPage[] {\n    const pageIndex = this.getPageIndex(page);\n    const otherPageIndex = this.getPageIndex(otherPage);\n    let startIndex: number;\n    let endIndex: number;\n\n    if (pageIndex <= otherPageIndex) {\n      startIndex = pageIndex;\n      endIndex = otherPageIndex;\n    } else {\n      startIndex = otherPageIndex;\n      endIndex = pageIndex;\n    }\n    return this.pageRange(startIndex, endIndex);\n  }\n\n  /**\n   * Takes a wizard page object as a parameter and returns the wizard page object of\n   * the page immediately before it in the page collection. Returns null if there is\n   * no page before the page it is passed.\n   *\n   * @memberof PageCollectionService\n   */\n  getPreviousPage(page: ClrWizardPage) {\n    const myPageIndex = this.getPageIndex(page);\n    const previousPageIndex = myPageIndex - 1;\n    if (previousPageIndex < 0) {\n      return null;\n    }\n    return this.getPageByIndex(previousPageIndex);\n  }\n\n  /**\n   * Accepts a wizard page object as a parameter and returns a Boolean that says if\n   * the page you sent it is complete.\n   *\n   * @memberof PageCollectionService\n   */\n  previousPageIsCompleted(page: ClrWizardPage) {\n    if (!page) {\n      return false;\n    }\n\n    const previousPage = this.getPreviousPage(page);\n\n    if (null === previousPage) {\n      // page is the first page. no previous page.\n      return true;\n    }\n\n    return previousPage.completed;\n  }\n\n  /**\n   * Takes a wizard page object as a parameter and returns the wizard page object of\n   * the page immediately after it in the page collection. Returns null if there is\n   * no page after the page it is passed.\n   *\n   * @memberof PageCollectionService\n   */\n  getNextPage(page: ClrWizardPage) {\n    const myPageIndex = this.getPageIndex(page);\n    const nextPageIndex = myPageIndex + 1;\n\n    if (nextPageIndex >= this.pagesAsArray.length) {\n      return null;\n    }\n    return this.getPageByIndex(nextPageIndex);\n  }\n\n  /**\n   * Takes a wizard page object as a parameter and generates a step item id from the\n   * page ID. Returns the generated step item ID as a string.\n   *\n   * @memberof PageCollectionService\n   */\n  getStepItemIdForPage(page: ClrWizardPage) {\n    const pageId = page.id;\n    const pageIdParts = pageId.split('-').reverse();\n\n    pageIdParts[1] = 'step';\n    return pageIdParts.reverse().join('-');\n  }\n\n  /**\n   * Generally only used internally to mark that a specific page has been \"committed\".\n   * This involves marking the page complete and firing the ClrWizardPage.onCommit\n   * (clrWizardPageOnCommit) output. Takes the wizard page object that you intend to\n   * mark completed as a parameter.\n   *\n   * @memberof PageCollectionService\n   */\n  commitPage(page: ClrWizardPage) {\n    const pageHasOverrides = page.stopNext || page.preventDefault;\n    page.completed = true;\n\n    if (!pageHasOverrides) {\n      // prevent loop of event emission; alternate flows work off\n      // of event emitters this is how they break that cycle.\n      page.onCommit.emit(page.id);\n    }\n  }\n\n  /**\n   * Sets all completed states of the pages in the page collection to false and\n   * notifies the navigation service to likewise reset the navigation.\n   *\n   * @memberof PageCollectionService\n   */\n  reset() {\n    this.pagesAsArray.forEach((page: ClrWizardPage) => {\n      page.completed = false;\n    });\n    this._pagesReset.next(true);\n  }\n\n  /**\n   * Rolls through all the pages in the page collection to make sure there are no\n   * incomplete pages sandwiched between completed pages in the workflow. Identifies\n   * the first incomplete page index and sets all pages behind it to a completed\n   * state of false.\n   *\n   * @memberof PageCollectionService\n   */\n  updateCompletedStates(): void {\n    const firstIncompleteIndex = this.findFirstIncompletePageIndex();\n\n    if (firstIncompleteIndex === this.pagesAsArray.length - 1) {\n      // all complete no need to do anything\n      return;\n    }\n\n    this.pagesAsArray.forEach((page: ClrWizardPage, index: number) => {\n      if (index > firstIncompleteIndex) {\n        page.completed = false;\n      }\n    });\n  }\n\n  /**\n   * Retrieves the index of the first incomplete page in the page collection.\n   *\n   * @memberof PageCollectionService\n   */\n  findFirstIncompletePageIndex(): number {\n    let returnIndex: number = null;\n    this.pagesAsArray.forEach((page: ClrWizardPage, index: number) => {\n      if (null === returnIndex && false === page.completed) {\n        returnIndex = index;\n      }\n    });\n\n    // fallthrough, all completed, return last page\n    if (null === returnIndex) {\n      returnIndex = this.pagesCount - 1;\n    }\n\n    return returnIndex;\n  }\n\n  findFirstIncompletePage(): ClrWizardPage {\n    const myIncompleteIndex = this.findFirstIncompletePageIndex();\n    return this.pagesAsArray[myIncompleteIndex];\n  }\n\n  /**\n   * Consolidates guard logic that prevents a couple of unfortunate edge cases with\n   * look ups on the collection of pages.\n   *\n   * @memberof PageCollectionService\n   */\n  private checkResults(results: ClrWizardPage[], requestedPageId: string) {\n    const foundPagesCount: number = results.length || 0;\n\n    if (foundPagesCount > 1) {\n      throw new Error('More than one page has the requested id ' + requestedPageId + '.');\n    } else if (foundPagesCount < 1) {\n      throw new Error('No page can be found with the id ' + requestedPageId + '.');\n    } else {\n      return results[0];\n    }\n  }\n}\n"]}