@yugu/gogocode
Version:
The simplest tool to parse/transform/generate code on ast
50 lines • 2.16 kB
JavaScript
// 同时依赖api和build-node
const api = require('./core')
const { buildObjectProperty } = require('./build-node');
const getValue = {
getAbsoluteValue(value, path) {
// 不需要完整ast，path里有路径信息，一级一级往上找
// 变量（作用域）、对象属性（外部引入）
if (value.type == 'MemberExpression') {
let obj = value;
let t1 = null; let t2 = '$_$';
while (obj.type == 'MemberExpression') {
const prop = obj.property.name;
t1 = { [prop]: t2 };
t2 = t1;
obj = obj.object;
}
return findObject(path);
function findObject(path) {
const { matchWildCardList: e1 } = api.getAstsBySelector(path.node, `var ${obj.name} = $_$`);
if (e1[0] && e1[0][0]) {
const { matchWildCardList: e2 } = api.getAstsBySelector(e1[0][0].structure,
buildObjectProperty(t1), false)
if (e2[0] && e2[0][0]) {
return getValue.getAbsoluteValue(e2[0][0].structure, path.parentPath)
} else return ""
} else {
if (path.parentPath) {
return findObject(path.parentPath);
} else return ""
}
}
} else if (value.type == 'Identifier') {
const name = value.name;
const { matchWildCardList } = api.getAstsBySelector(path.node, `var ${name} = $_$`);
if (path.parentPath) {
if (matchWildCardList[0] && matchWildCardList[0][0]) {
return getValue.getAbsoluteValue(matchWildCardList[0][0].structure, path.parentPath);
} else {
return getValue.getAbsoluteValue(value, path.parentPath);
}
} else {
return value;
}
}else {
// 几种可能：字符串、对象、数字、数组、表达式
return value || 1;
}
}
}
module.exports = getValue;