minixyz/utils/recordSource.js

class TransCoding {
  constructor(params) {
    this.params = params
    this.toBase64Table = 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/'
    this.base64Pad = '='
  }
  toBase64() {
    let result = ''
    let length = this.params.length
    let i

    for (i = 0; i < (length - 2); i += 3) {
      result += this.toBase64Table[this.params.charCodeAt(i) >> 2];
      result += this.toBase64Table[((this.params.charCodeAt(i) & 0x03) << 4) + (this.params.charCodeAt(i + 1) >> 4)];
      result += this.toBase64Table[((this.params.charCodeAt(i + 1) & 0x0f) << 2) + (this.params.charCodeAt(i + 2) >> 6)];
      result += this.toBase64Table[this.params.charCodeAt(i + 2) & 0x3f];
    }

    if (length % 3) {
      i = length - (length % 3);
      result += this.toBase64Table[this.params.charCodeAt(i) >> 2];
      if ((length % 3) == 2) {
        result += this.toBase64Table[((this.params.charCodeAt(i) & 0x03) << 4) + (this.params.charCodeAt(i + 1) >> 4)];
        result += this.toBase64Table[(this.params.charCodeAt(i + 1) & 0x0f) << 2];
        result += this.base64Pad;
      } else {
        result += this.toBase64Table[(this.params.charCodeAt(i) & 0x03) << 4];
        result += this.base64Pad + this.base64Pad;
      }
    }
    return result;
  }
  encode() {
    return encodeURIComponent(this.toBase64())
  }
}

function recordSource(app, params) {
  let fromSource = app.globalData.fromSource
  let currentSource = new TransCoding(params).encode()
  app.setFromSource(currentSource)
  return fromSource
}
export default recordSource