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"use strict";
Object.defineProperty(exports, "__esModule", {
value: true
});
exports.default = parseAndBuildMetadata;
var _t = require("@babel/types");
var _parser = require("@babel/parser");
var _codeFrame = require("@babel/code-frame");
const {
isCallExpression,
isExpressionStatement,
isFunction,
isIdentifier,
isJSXIdentifier,
isNewExpression,
isPlaceholder,
isStatement,
isStringLiteral,
removePropertiesDeep,
traverse
} = _t;
const PATTERN = /^[_$A-Z0-9]+$/;
function parseAndBuildMetadata(formatter, code, opts) {
const {
placeholderWhitelist,
placeholderPattern,
preserveComments,
syntacticPlaceholders
} = opts;
const ast = parseWithCodeFrame(code, opts.parser, syntacticPlaceholders);
removePropertiesDeep(ast, {
preserveComments
});
formatter.validate(ast);
const syntactic = {
placeholders: [],
placeholderNames: new Set()
};
const legacy = {
placeholders: [],
placeholderNames: new Set()
};
const isLegacyRef = {
value: undefined
};
traverse(ast, placeholderVisitorHandler, {
syntactic,
legacy,
isLegacyRef,
placeholderWhitelist,
placeholderPattern,
syntacticPlaceholders
});
return Object.assign({
ast
}, isLegacyRef.value ? legacy : syntactic);
}
function placeholderVisitorHandler(node, ancestors, state) {
var _state$placeholderWhi;
let name;
if (isPlaceholder(node)) {
if (state.syntacticPlaceholders === false) {
throw new Error("%%foo%%-style placeholders can't be used when " + "'.syntacticPlaceholders' is false.");
} else {
name = node.name.name;
state.isLegacyRef.value = false;
}
} else if (state.isLegacyRef.value === false || state.syntacticPlaceholders) {
return;
} else if (isIdentifier(node) || isJSXIdentifier(node)) {
name = node.name;
state.isLegacyRef.value = true;
} else if (isStringLiteral(node)) {
name = node.value;
state.isLegacyRef.value = true;
} else {
return;
}
if (!state.isLegacyRef.value && (state.placeholderPattern != null || state.placeholderWhitelist != null)) {
throw new Error("'.placeholderWhitelist' and '.placeholderPattern' aren't compatible" + " with '.syntacticPlaceholders: true'");
}
if (state.isLegacyRef.value && (state.placeholderPattern === false || !(state.placeholderPattern || PATTERN).test(name)) && !((_state$placeholderWhi = state.placeholderWhitelist) != null && _state$placeholderWhi.has(name))) {
return;
}
ancestors = ancestors.slice();
const {
node: parent,
key
} = ancestors[ancestors.length - 1];
let type;
if (isStringLiteral(node) || isPlaceholder(node, {
expectedNode: "StringLiteral"
})) {
type = "string";
} else if (isNewExpression(parent) && key === "arguments" || isCallExpression(parent) && key === "arguments" || isFunction(parent) && key === "params") {
type = "param";
} else if (isExpressionStatement(parent) && !isPlaceholder(node)) {
type = "statement";
ancestors = ancestors.slice(0, -1);
} else if (isStatement(node) && isPlaceholder(node)) {
type = "statement";
} else {
type = "other";
}
const {
placeholders,
placeholderNames
} = state.isLegacyRef.value ? state.legacy : state.syntactic;
placeholders.push({
name,
type,
resolve: ast => resolveAncestors(ast, ancestors),
isDuplicate: placeholderNames.has(name)
});
placeholderNames.add(name);
}
function resolveAncestors(ast, ancestors) {
let parent = ast;
for (let i = 0; i < ancestors.length - 1; i++) {
const {
key,
index
} = ancestors[i];
if (index === undefined) {
parent = parent[key];
} else {
parent = parent[key][index];
}
}
const {
key,
index
} = ancestors[ancestors.length - 1];
return {
parent,
key,
index
};
}
function parseWithCodeFrame(code, parserOpts, syntacticPlaceholders) {
const plugins = (parserOpts.plugins || []).slice();
if (syntacticPlaceholders !== false) {
plugins.push("placeholders");
}
parserOpts = Object.assign({
allowReturnOutsideFunction: true,
allowSuperOutsideMethod: true,
sourceType: "module"
}, parserOpts, {
plugins
});
try {
return (0, _parser.parse)(code, parserOpts);
} catch (err) {
const loc = err.loc;
if (loc) {
err.message += "\n" + (0, _codeFrame.codeFrameColumns)(code, {
start: loc
});
err.code = "BABEL_TEMPLATE_PARSE_ERROR";
}
throw err;
}
}