| 1 | const babylon = require('@babel/parser');
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| 2 | const {omit, collectAllNodes} = require('./annotation-utils');
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| 3 | const omitFields = {
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| 4 | loc: true,
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| 5 | start: true,
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| 6 | end: true,
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| 7 | optional: true,
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| 8 | variance: true,
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| 9 | exact: true,
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| 10 | static: true
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| 11 | };
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| 12 |
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| 13 | function extractTypes(source) {
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| 14 | const ast = babylon.parse(source, {plugins: ['flow']});
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| 15 | const types = collectAllNodes(ast, node => node.type === 'TypeAlias').reduce((acc, node) => {
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| 16 | acc[node.id.name] = omit(node.right, omitFields);
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| 17 | return acc;
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| 18 | }, {});
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| 19 | const expr = collectAllNodes(
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| 20 | ast,
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| 21 | node =>
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| 22 | node.type === 'FunctionDeclaration' &&
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| 23 | node.returnType &&
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| 24 | node.returnType.typeAnnotation &&
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| 25 | node.id.name.indexOf('annotate_') === 0
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| 26 | ).reduce((acc, node) => {
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| 27 | acc[node.id.name.replace('annotate_', '')] = omit(node.returnType.typeAnnotation, omitFields);
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| 28 | return acc;
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| 29 | }, {});
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| 30 | return {expr, types};
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| 31 | }
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| 32 |
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| 33 | module.exports = {extractTypes};
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