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| 1 | +import { Accessor, createSignal } from "solid-js"; |
| 2 | + |
| 3 | +/** |
| 4 | + * @property `source` - DOMString containing a URL representing the object given in the parameter |
| 5 | + */ |
| 6 | +export type UploadFile = { |
| 7 | + source: string; |
| 8 | + name: string; |
| 9 | + size: number; |
| 10 | + file: File; |
| 11 | +}; |
| 12 | +/** |
| 13 | + * @property `accept` - Comma-separated list of one or more file types, or unique file type specifiers |
| 14 | + * @link `accept` - https://developer.mozilla.org/en-US/docs/Web/HTML/Attributes/accept |
| 15 | + */ |
| 16 | +export type UploadSetter = ( |
| 17 | + { |
| 18 | + accept, |
| 19 | + multiple |
| 20 | + }: { |
| 21 | + accept?: string | undefined; |
| 22 | + multiple?: boolean | undefined; |
| 23 | + }, |
| 24 | + cb: (files: UploadFile | UploadFile[]) => void |
| 25 | +) => void; |
| 26 | + |
| 27 | +function createInputComponent({ |
| 28 | + multiple = false, |
| 29 | + accept = "" |
| 30 | +}: { |
| 31 | + multiple: boolean; |
| 32 | + accept: string; |
| 33 | +}) { |
| 34 | + const element = document.createElement("input"); |
| 35 | + element.type = "file"; |
| 36 | + element.accept = accept; |
| 37 | + element.multiple = multiple; |
| 38 | + |
| 39 | + return element; |
| 40 | +} |
| 41 | + |
| 42 | +/** |
| 43 | + * Primitive to make uploading files easier. |
| 44 | + * |
| 45 | + * @return files - Uploaded file or files |
| 46 | + * @return uploadFiles - Setter function |
| 47 | + * |
| 48 | + * @example |
| 49 | + * ```ts |
| 50 | + * const [files, selectFiles] = createUpload(); |
| 51 | + * // single file |
| 52 | + * selectFiles({ multiple: true, accept: "image/*" }, (files: CustomFile[]) => { |
| 53 | + * console.log(files); |
| 54 | + * }); |
| 55 | + * // multiple files |
| 56 | + * selectFile({}, ({ source, name, size, file }: CustomFile) => { |
| 57 | + * console.log({ source, name, size, file }); |
| 58 | + * }); |
| 59 | + * ``` |
| 60 | + */ |
| 61 | +const createUpload = (): [Accessor<UploadFile | UploadFile[] | null>, UploadSetter] => { |
| 62 | + const [files, setFiles] = createSignal<UploadFile | UploadFile[] | null>(null); |
| 63 | + |
| 64 | + let userCallback: any = () => {}; |
| 65 | + |
| 66 | + async function onChange(this: HTMLInputElement, ev: Event) { |
| 67 | + const parsedFiles = []; |
| 68 | + const target = this; |
| 69 | + |
| 70 | + for (const index in target.files) { |
| 71 | + const fileIndex = +index; |
| 72 | + if (isNaN(+fileIndex)) { |
| 73 | + continue; |
| 74 | + } |
| 75 | + |
| 76 | + const file = target.files[fileIndex]; |
| 77 | + |
| 78 | + const parsedFile: UploadFile = { |
| 79 | + source: URL.createObjectURL(file), |
| 80 | + name: file.name, |
| 81 | + size: file.size, |
| 82 | + file |
| 83 | + }; |
| 84 | + |
| 85 | + parsedFiles.push(parsedFile); |
| 86 | + } |
| 87 | + |
| 88 | + target.removeEventListener("change", onChange); |
| 89 | + |
| 90 | + target.remove(); |
| 91 | + |
| 92 | + if (target.multiple) { |
| 93 | + setFiles(parsedFiles); |
| 94 | + return userCallback(parsedFiles); |
| 95 | + } |
| 96 | + |
| 97 | + setFiles(parsedFiles[0]); |
| 98 | + return userCallback(parsedFiles[0]); |
| 99 | + } |
| 100 | + |
| 101 | + const uploadFile = ( |
| 102 | + { accept = "", multiple = false }: { accept?: string; multiple?: boolean }, |
| 103 | + cb: any |
| 104 | + ) => { |
| 105 | + if (typeof cb === "function") { |
| 106 | + userCallback = cb; |
| 107 | + } |
| 108 | + |
| 109 | + const inputEL = createInputComponent({ multiple, accept }); |
| 110 | + |
| 111 | + inputEL.addEventListener("change", onChange); |
| 112 | + inputEL.click(); |
| 113 | + }; |
| 114 | + |
| 115 | + return [files, uploadFile]; |
| 116 | +}; |
| 117 | + |
| 118 | +export default createUpload; |
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