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refactor(ivy): i18n - change `unwrapMessagePartsFromLocalizeCall` to accept a `NodePath` (#33097) 

In Babel `NodePath` objects have more useful information available than
simple AST nodes. But they are more difficult to create, especially for testing.

This commit prepares the way for parsing more complex code downlevelling
scenarios.

PR Close #33097
This commit is contained in:
Pete Bacon Darwin 2019-10-11 07:48:41 +01:00 committed by Miško Hevery
parent 127cec0214
commit d617373a76
4 changed files with 69 additions and 26 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
packages/localize/src/tools/src/translate/source_files/es5_translate_plugin.ts
View File

@ -21,7 +21,7 @@ export function makeEs5TranslatePlugin(
try {
const calleePath = callPath.get('callee');
if (isNamedIdentifier(calleePath, localizeName) && isGlobalIdentifier(calleePath)) {
const messageParts = unwrapMessagePartsFromLocalizeCall(callPath.node);
const messageParts = unwrapMessagePartsFromLocalizeCall(callPath);
const expressions = unwrapSubstitutionsFromLocalizeCall(callPath.node);
const translated =
translate(diagnostics, translations, messageParts, expressions, missingTranslation);

46
packages/localize/src/tools/src/translate/source_files/source_file_utils.ts
View File

@ -51,41 +51,53 @@ export function buildLocalizeReplacement(
*
* @param call The AST node of the call to process.
*/
export function unwrapMessagePartsFromLocalizeCall(call: t.CallExpression): TemplateStringsArray {
let cooked = call.arguments[0];
if (!t.isExpression(cooked)) {
throw new BabelParseError(call, 'Unexpected argument to `$localize`: ' + cooked);
export function unwrapMessagePartsFromLocalizeCall(call: NodePath<t.CallExpression>):
TemplateStringsArray {
let cooked = call.get('arguments')[0];
if (cooked === undefined) {
throw new BabelParseError(call.node, '`$localize` called without any arguments.');
}
if (!cooked.isExpression()) {
throw new BabelParseError(
cooked.node, 'Unexpected argument to `$localize` (expected an array).');
}
// If there is no call to `__makeTemplateObject(...)`, then `raw` must be the same as `cooked`.
let raw = cooked;
// Check for cached call of the form `x || x = __makeTemplateObject(...)`
if (t.isLogicalExpression(cooked) && cooked.operator === '||' && t.isIdentifier(cooked.left) &&
t.isExpression(cooked.right)) {
if (t.isAssignmentExpression(cooked.right)) {
cooked = cooked.right.right;
if (cooked.isLogicalExpression() && cooked.node.operator === '||' &&
cooked.get('left').isIdentifier()) {
const right = cooked.get('right');
if (right.isAssignmentExpression()) {
cooked = right.get('right');
if (!cooked.isExpression()) {
throw new BabelParseError(
cooked.node, 'Unexpected "makeTemplateObject()" function (expected an expression).');
}
}
}
// Check for `__makeTemplateObject(cooked, raw)` call
if (t.isCallExpression(cooked)) {
raw = cooked.arguments[1] as t.Expression;
if (!t.isExpression(raw)) {
if (cooked.isCallExpression()) {
const arg2 = cooked.get('arguments')[1];
if (!arg2.isExpression()) {
throw new BabelParseError(
raw,
arg2.node,
'Unexpected `raw` argument to the "makeTemplateObject()" function (expected an expression).');
}
cooked = cooked.arguments[0];
if (!t.isExpression(cooked)) {
raw = arg2;
cooked = cooked.get('arguments')[0];
if (!cooked.isExpression()) {
throw new BabelParseError(
cooked,
cooked.node,
'Unexpected `cooked` argument to the "makeTemplateObject()" function (expected an expression).');
}
}
const cookedStrings = unwrapStringLiteralArray(cooked);
const rawStrings = unwrapStringLiteralArray(raw);
const cookedStrings = unwrapStringLiteralArray(cooked.node);
const rawStrings = unwrapStringLiteralArray(raw.node);
return ɵmakeTemplateObject(cookedStrings, rawStrings);
}

18
packages/localize/src/tools/test/translate/source_files/es5_translate_plugin_spec.ts
View File

@ -97,12 +97,28 @@ describe('makeEs5Plugin', () => {
expect(diagnostics.hasErrors).toBe(true);
expect(diagnostics.messages[0]).toEqual({
type: 'error',
message: '/app/dist/test.js: Unexpected argument to `$localize`: undefined\n' +
message: '/app/dist/test.js: `$localize` called without any arguments.\n' +
'> 1 | $localize()\n' +
' | ^',
});
});
it('should add diagnostic error with code-frame information if the arguments to `$localize` are invalid',
() => {
const diagnostics = new Diagnostics();
const input = '$localize(...x)';
transformSync(
input,
{plugins: [makeEs5TranslatePlugin(diagnostics, {})], filename: '/app/dist/test.js'});
expect(diagnostics.hasErrors).toBe(true);
expect(diagnostics.messages[0]).toEqual({
type: 'error',
message: '/app/dist/test.js: Unexpected argument to `$localize` (expected an array).\n' +
'> 1 | $localize(...x)\n' +
' | ^',
});
});
it('should add diagnostic error with code-frame information if the first argument to `$localize` is not an array',
() => {
const diagnostics = new Diagnostics();

29
packages/localize/src/tools/test/translate/source_files/source_file_utils_spec.ts
View File

@ -9,7 +9,7 @@ import {ɵmakeTemplateObject} from '@angular/localize';
import {NodePath, transformSync} from '@babel/core';
import generate from '@babel/generator';
import template from '@babel/template';
import {Expression, Identifier, TaggedTemplateExpression, ExpressionStatement, FunctionDeclaration, CallExpression, isParenthesizedExpression, numericLiteral, binaryExpression, NumericLiteral} from '@babel/types';
import {Expression, Identifier, TaggedTemplateExpression, ExpressionStatement, FunctionDeclaration, CallExpression, isParenthesizedExpression, numericLiteral, binaryExpression, NumericLiteral, traverse} from '@babel/types';
import {isGlobalIdentifier, isNamedIdentifier, isStringLiteralArray, isArrayOfExpressions, unwrapStringLiteralArray, unwrapMessagePartsFromLocalizeCall, wrapInParensIfNecessary, buildLocalizeReplacement, unwrapSubstitutionsFromLocalizeCall, unwrapMessagePartsFromTemplateLiteral} from '../../../src/translate/source_files/source_file_utils';
describe('utils', () => {
@ -71,17 +71,14 @@ describe('utils', () => {
describe('unwrapMessagePartsFromLocalizeCall', () => {
it('should return an array of string literals from a direct call to a tag function', () => {
const ast = template.ast `$localize(['a', 'b\\t', 'c'], 1, 2)` as ExpressionStatement;
const call = ast.expression as CallExpression;
const call = getFirstCallExpression(`$localize(['a', 'b\\t', 'c'], 1, 2)`);
const parts = unwrapMessagePartsFromLocalizeCall(call);
expect(parts).toEqual(['a', 'b\t', 'c']);
});
it('should return an array of string literals from a downleveled tagged template', () => {
const ast = template.ast
`$localize(__makeTemplateObject(['a', 'b\\t', 'c'], ['a', 'b\\\\t', 'c']), 1, 2)` as
ExpressionStatement;
const call = ast.expression as CallExpression;
let call = getFirstCallExpression(
`$localize(__makeTemplateObject(['a', 'b\\t', 'c'], ['a', 'b\\\\t', 'c']), 1, 2)`);
const parts = unwrapMessagePartsFromLocalizeCall(call);
expect(parts).toEqual(['a', 'b\t', 'c']);
expect(parts.raw).toEqual(['a', 'b\\t', 'c']);
@ -182,3 +179,21 @@ function collectExpressionsPlugin() {
const visitor = {Expression: (path: NodePath<Expression>) => { expressions.push(path); }};
return {expressions, plugin: {visitor}};
}
function getFirstCallExpression(code: string): NodePath<CallExpression> {
let callPath: NodePath<CallExpression>|undefined = undefined;
transformSync(code, {
plugins: [{
visitor: {
CallExpression(path) {
callPath = path;
path.stop();
}
}
}]
});
if (callPath === undefined) {
throw new Error('CallExpression not found in code:' + code);
}
return callPath;
}