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utils.ts
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utils.ts
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import { IBase64File } from './types'
import { YAPIX } from './consts'
export function fileToBase64File(file: File): Promise<IBase64File> {
return new Promise((resolve, reject) => {
const reader = new FileReader()
reader.onload = () => {
resolve(
arrayBufferToBase64File(reader.result as any, file.name, file.type),
)
}
reader.onerror = error => reject(error)
reader.readAsArrayBuffer(file)
})
}
export function base64FileToFile(base64File: IBase64File): File {
const bstr = atob(base64File.base64)
let n = bstr.length
const u8arr = new Uint8Array(n)
while (n--) {
u8arr[n] = bstr.charCodeAt(n)
}
const file = new File(
[u8arr],
base64File.name,
{
type: base64File.type,
},
)
return file
}
export function arrayBufferToBase64File(buffer: ArrayBuffer, name: string, contentType: string): IBase64File {
let binary = ''
const bytes = new Uint8Array(buffer)
const len = bytes.byteLength
for (let i = 0; i < len; i++) {
binary += String.fromCharCode(bytes[i])
}
const base64 = btoa(binary)
return {
[YAPIX.BASE64_FILE_FLAG]: true,
base64: base64,
name: name,
type: contentType,
}
}
export function readBase64File<T extends 'text' | 'dataUrl' | 'arrayBuffer'>(
base64File: IBase64File,
readAs: T,
charset?: string,
): Promise<T extends 'arrayBuffer' ? ArrayBuffer : string> {
return new Promise((resolve, reject) => {
const reader = new FileReader()
reader.onload = () => {
resolve(reader.result as any)
}
reader.onerror = error => reject(error)
const file = base64FileToFile(base64File)
if (readAs === 'dataUrl') {
reader.readAsDataURL(file)
}
else if (readAs === 'arrayBuffer') {
reader.readAsArrayBuffer(file)
}
else {
reader.readAsText(file, charset)
}
})
}
export function injectJs(path: string): void {
const js = document.createElement('script')
js.src = chrome.extension.getURL(path)
js.onload = () => js.remove()
;(document.head || document.documentElement).appendChild(js)
}