@autojs/opencv/lib/cv4autojs.js

Asynchronous OpenCV 3.x nodejs bindings with JavaScript and TypeScript API for Auto.js Pro.

const fs = require('fs')
const path = require('path')

if (typeof (process.env.AUTOJS_NATIVE_LIBRARY_PATH) === 'undefined') {
    throw new Error('Not supported Auto.js Pro version. Sees https://g.pro.autojs.org/docs/v9 .')
}

const targetBinDir = path.join(process.env.AUTOJS_NATIVE_LIBRARY_PATH, 'opencv4autojs')
const package = require('../package.json')
const version = package.prebuiltVersion
const targetBinPath = path.join(targetBinDir, `${version}.${process.arch}.node`)

const hasBinaryFile = fs.existsSync(targetBinPath) || copyBin(targetBinDir, targetBinPath);

function copyBin(binDir, binPath) {
    if (fs.existsSync(binDir)) {
        fs.readdirSync(binDir).forEach(file => fs.unlinkSync(path.join(binDir, file)))
    } else {
        fs.mkdirSync(binDir, { recursive: true })
    }
    const sourceBinPath = path.join(__dirname, `../prebuilt/opencv4autojs.${process.arch}.node`)
    if (!fs.existsSync(sourceBinPath)) {
        return false;
    }
    fs.copyFileSync(sourceBinPath, binPath)
    return true;
}

module.exports = hasBinaryFile ? require(targetBinPath) : missingLibrary({
    drawTextBox: missingLibraryFunction(),
    drawDetection: missingLibraryFunction(),
    calcHist: missingLibraryFunction(),
    Mat: missingLibrary({}),
    __esModule: null,
});

function missingLibrary(obj) {
    return new Proxy(obj, {
        get: (target, prop) => {
            if (target.hasOwnProperty(prop)) {
                return target[prop];
            }
            return missingLibraryError(prop);
        },
    });
}

function missingLibraryFunction() {
    return function () {
        return missingLibraryError();
    }
}

class MissingLibraryError extends Error {
    constructor(msg) {
        super(msg);
    }
}

function missingLibraryError(prop) {
    throw new MissingLibraryError(`The binary file opencv4autojs.${process.arch}.node does not exist, please ensure the optimization option 'removeOpenCv' is false on building apk.(Access property ${prop})`);
}