const glob = require('fast-glob');
const path = require('path');
const fse = require('fs-extra');
const ts = require('typescript');
const TARGET_DIR = path.resolve(__dirname, '../client-translations.json');
const messages = new Set();
const parseTree = node => {
// message('some message');
if (
node.kind === ts.SyntaxKind.CallExpression &&
node.expression.escapedText === 'message' &&
node.arguments[0].kind === ts.SyntaxKind.StringLiteral
) {
messages.add(node.arguments[0].text);
}
// <Trans/> will always be self-closing
if (
node.kind === ts.SyntaxKind.JsxSelfClosingElement &&
node.tagName.escapedText === 'Trans'
) {
node.attributes.properties.forEach(prop => {
// ignore spread attributes
if (
prop.kind === ts.SyntaxKind.JsxAttribute &&
prop.name.escapedText === 'message'
) {
// message="string"
if (prop.initializer.text) {
messages.add(prop.initializer.text);
// message={'string "one"'}
} else if (
prop.initializer.expression &&
prop.initializer.expression.kind === ts.SyntaxKind.StringLiteral
) {
messages.add(prop.initializer.expression.text);
}
}
});
}
// trans({message: 'string'})
if (
node.kind === ts.SyntaxKind.CallExpression &&
node.expression.escapedText === 'trans' &&
node.arguments[0].kind === ts.SyntaxKind.ObjectLiteralExpression
) {
node.arguments[0].properties.forEach(prop => {
if (prop.name.escapedText === 'message') {
messages.add(prop.initializer.text);
}
});
}
node.forEachChild(parseTree);
};
async function run() {
const files = await glob([
'resources/client/**/*.{tsx,ts}',
'common/resources/client/**/*.{tsx,ts}',
]);
files.map(filename => {
const content = fse.readFileSync(filename).toString();
const sourceFile = ts.createSourceFile(
filename,
content,
ts.ScriptTarget.Latest
);
parseTree(sourceFile);
});
const messagesObj = {};
messages.forEach(message => {
messagesObj[message] = message;
});
const json = JSON.stringify(messagesObj);
fse.writeFile(TARGET_DIR, json);
}
run();