|
| 1 | +//////////////////////////////// |
| 2 | +// WebIDL compliant interface // |
| 3 | +//////////////////////////////// |
| 4 | + |
| 5 | +class Book { |
| 6 | + constructor(title, author, genre, pages) { |
| 7 | + this.title = title; |
| 8 | + this.author = author; |
| 9 | + this.genre = genre || null; |
| 10 | + this.pages = pages || 0; |
| 11 | + } |
| 12 | +} |
| 13 | + |
| 14 | +class Library { |
| 15 | + constructor(name) { |
| 16 | + this.libraryName = name; |
| 17 | + this.books = new Map(); |
| 18 | + } |
| 19 | + |
| 20 | + get totalBooks() { |
| 21 | + return this.books.size; |
| 22 | + } |
| 23 | + |
| 24 | + addBook(book) { |
| 25 | + if (this.books.has(book.title)) { |
| 26 | + return false; // Book already exists |
| 27 | + } |
| 28 | + this.books.set(book.title, book); |
| 29 | + return true; |
| 30 | + } |
| 31 | + |
| 32 | + removeBook(title) { |
| 33 | + return this.books.delete(title); |
| 34 | + } |
| 35 | + |
| 36 | + getBookByTitle(title) { |
| 37 | + return this.books.get(title) || null; |
| 38 | + } |
| 39 | + |
| 40 | + listBooks() { |
| 41 | + return Array.from(this.books.values()); |
| 42 | + } |
| 43 | + |
| 44 | + renameLibrary(newName) { |
| 45 | + this.libraryName = newName; |
| 46 | + } |
| 47 | + |
| 48 | + asAdvancedLibrary() { |
| 49 | + const al = new AdvancedLibrary(); |
| 50 | + al.libraryName = this.libraryName; |
| 51 | + al.books = this.books; |
| 52 | + return al; |
| 53 | + } |
| 54 | +} |
| 55 | + |
| 56 | +class AdvancedLibrary extends Library { |
| 57 | + constructor() { |
| 58 | + super(); |
| 59 | + } |
| 60 | + |
| 61 | + asLibrary() { |
| 62 | + return new Library("advanced-library"); |
| 63 | + } |
| 64 | + |
| 65 | + filterBooks(name) { |
| 66 | + return Array.from(this.books.values()).filter((book) => { |
| 67 | + return ( |
| 68 | + book.title.toLowerCase().includes(name.toLowerCase()) || |
| 69 | + book.author.toLowerCase().includes(name.toLowerCase()) |
| 70 | + ); |
| 71 | + }); |
| 72 | + } |
| 73 | +} |
| 74 | + |
| 75 | +class BookManager { |
| 76 | + constructor() { |
| 77 | + this._library = null; |
| 78 | + } |
| 79 | + |
| 80 | + initLibrary(name) { |
| 81 | + const library = new Library(name); |
| 82 | + this._library = library; |
| 83 | + } |
| 84 | + |
| 85 | + library() { |
| 86 | + if (!this._library) { |
| 87 | + throw new Error("initLibrary must be called first!"); |
| 88 | + } |
| 89 | + const library = this._library; |
| 90 | + this._library = null; |
| 91 | + return library; |
| 92 | + } |
| 93 | +} |
| 94 | + |
| 95 | +// Wire up the implementations above to globalThis |
| 96 | +// which will be used by the component implicitly |
| 97 | +// |
| 98 | +// While somewhat awkward, current jco bindings |
| 99 | +// generate a member/namespace for every dash, so: |
| 100 | +// |
| 101 | +// "global-book-library" => globalThis.book.library |
| 102 | +// "global-console" => globalThis.console |
| 103 | +globalThis.book = { |
| 104 | + library: { |
| 105 | + AdvancedLibrary, |
| 106 | + Library, |
| 107 | + BookManager, |
| 108 | + }, |
| 109 | +}; |
| 110 | + |
| 111 | +//////////////////////////////// |
| 112 | +// Usage of transpiled module // |
| 113 | +//////////////////////////////// |
| 114 | + |
| 115 | +// NOTE: we use a dynamic import of our transpiled WebAssembly component |
| 116 | +// to ensure that globalThis is setup prior to the component logic running |
| 117 | +const { librarian } = await import("./dist/transpiled/librarian.js"); |
| 118 | + |
| 119 | +let library = librarian.createLocalLibrary(); |
| 120 | + |
| 121 | +library = librarian.addFavoriteBook(library); |
| 122 | + |
| 123 | +const [_library, favorites] = librarian.getFavoriteBooks(library); |
| 124 | + |
| 125 | +console.log("Librarian's favorite books:", favorites); |
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