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images.js
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images.js
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const fs = require('fs');
const resPath = './src/res/';
const basePath = resPath + 'images/';
const iosAssets = 'Images.xcassets';
const assetExtension = '.imageset';
const pjson = JSON.parse(fs.readFileSync('./package.json', 'utf8'));
const rimraf = require('rimraf');
const defaultIosAssetContent = {
images: [
{
idiom: 'universal',
scale: '1x',
},
{
idiom: 'universal',
scale: '2x',
},
{
idiom: 'universal',
scale: '3x',
},
],
info: {
author: 'xcode',
version: 1,
},
};
const iosArrayPosMedia = {
'1x': 0,
'2x': 1,
'3x': 2,
};
const getDirectories = (source) =>
fs
.readdirSync(source, {withFileTypes: true})
.filter((dirent) => dirent.isDirectory())
.map((dirent) => dirent.name + '/');
const getImages = (source) =>
fs
.readdirSync(source)
.filter((file) => {
const fileLc = file.toLowerCase();
return (
fileLc.toLowerCase().endsWith('.jpg') ||
fileLc.toLowerCase().endsWith('.jpeg') ||
fileLc.toLowerCase().endsWith('.png')
);
})
.map((file) => {
let key = cleanMediaSuffixes(file).split('.')[0];
return {key, filename: source + file};
});
const getImagesForDirectories = () => {
let images = [];
getDirectories(basePath).forEach((directory) => {
images = images.concat(getImages(basePath + directory));
});
return images;
};
const getEnumFileContent = (images) => {
const keys = images
.map((image) => {
return `'${image.key}' = '${image.key}'`;
})
.join(',\n ');
return `export enum Images {
${keys}
}`;
};
const getMediaTypeForFilename = (filename) => {
if (filename.indexOf('@3x') !== -1) {
return {android: 'xxhdpi', ios: '3x'};
} else if (filename.indexOf('@2x') !== -1) {
return {android: 'xhdpi', ios: '2x'};
} else {
return {android: 'mdpi', ios: '1x'};
}
};
const getRootFilename = (filename) => {
const splittedFn = filename.split('/');
return splittedFn[splittedFn.length - 1];
};
const cleanMediaSuffixes = (filename) => {
return filename.replace('@2x', '').replace('@3x', '');
};
const getIosAssetsContentFileForFile = (filename) => {
const contentFile = Object.assign({}, defaultIosAssetContent);
const type = getMediaTypeForFilename(filename);
const rootFilename = getRootFilename(filename);
const arrayPosition = iosArrayPosMedia[type.ios];
contentFile.images[arrayPosition].filename = rootFilename;
return contentFile;
};
const createIosAssetForFilename = (filename) => {
const rootFilename = getRootFilename(filename);
const cleanFilename = cleanMediaSuffixes(rootFilename).split('.')[0];
const fileAssetFolder =
'./ios/' +
pjson.name +
'/' +
iosAssets +
'/' +
cleanFilename +
assetExtension;
if (fs.existsSync(fileAssetFolder)) {
rimraf.sync(fileAssetFolder);
}
fs.mkdirSync(fileAssetFolder);
const contentJson = getIosAssetsContentFileForFile(filename);
fs.writeFileSync(
fileAssetFolder + '/Contents.json',
JSON.stringify(contentJson, null, 2),
'utf8',
);
fs.copyFileSync(filename, fileAssetFolder + '/' + rootFilename);
};
const createAndroidDrawablesForFilename = (filename) => {
const rootFilename = getRootFilename(filename);
const fileAssetFolder =
'./android/app/src/main/res/drawable-' +
getMediaTypeForFilename(filename).android;
if (!fs.existsSync(fileAssetFolder)) {
fs.mkdirSync(fileAssetFolder);
}
fs.copyFileSync(
filename,
fileAssetFolder + '/' + cleanMediaSuffixes(rootFilename),
);
};
const generate = () => {
const imagesForDirectories = getImagesForDirectories();
const enumFileContent = getEnumFileContent(imagesForDirectories);
fs.writeFileSync(resPath + '/images.tsx', enumFileContent, 'utf8');
imagesForDirectories.forEach((item) => {
createIosAssetForFilename(item.filename);
createAndroidDrawablesForFilename(item.filename);
});
};
generate();