import-builder.js
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"use strict";
Object.defineProperty(exports, "__esModule", {
value: true
});
exports.default = void 0;
var _assert = require("assert");
var _t = require("@babel/types");
const {
callExpression,
cloneNode,
expressionStatement,
identifier,
importDeclaration,
importDefaultSpecifier,
importNamespaceSpecifier,
importSpecifier,
memberExpression,
stringLiteral,
variableDeclaration,
variableDeclarator
} = _t;
class ImportBuilder {
constructor(importedSource, scope, hub) {
this._statements = [];
this._resultName = null;
this._importedSource = void 0;
this._scope = scope;
this._hub = hub;
this._importedSource = importedSource;
}
done() {
return {
statements: this._statements,
resultName: this._resultName
};
}
import() {
this._statements.push(importDeclaration([], stringLiteral(this._importedSource)));
return this;
}
require() {
this._statements.push(expressionStatement(callExpression(identifier("require"), [stringLiteral(this._importedSource)])));
return this;
}
namespace(name = "namespace") {
const local = this._scope.generateUidIdentifier(name);
const statement = this._statements[this._statements.length - 1];
_assert(statement.type === "ImportDeclaration");
_assert(statement.specifiers.length === 0);
statement.specifiers = [importNamespaceSpecifier(local)];
this._resultName = cloneNode(local);
return this;
}
default(name) {
const id = this._scope.generateUidIdentifier(name);
const statement = this._statements[this._statements.length - 1];
_assert(statement.type === "ImportDeclaration");
_assert(statement.specifiers.length === 0);
statement.specifiers = [importDefaultSpecifier(id)];
this._resultName = cloneNode(id);
return this;
}
named(name, importName) {
if (importName === "default") return this.default(name);
const id = this._scope.generateUidIdentifier(name);
const statement = this._statements[this._statements.length - 1];
_assert(statement.type === "ImportDeclaration");
_assert(statement.specifiers.length === 0);
statement.specifiers = [importSpecifier(id, identifier(importName))];
this._resultName = cloneNode(id);
return this;
}
var(name) {
const id = this._scope.generateUidIdentifier(name);
let statement = this._statements[this._statements.length - 1];
if (statement.type !== "ExpressionStatement") {
_assert(this._resultName);
statement = expressionStatement(this._resultName);
this._statements.push(statement);
}
this._statements[this._statements.length - 1] = variableDeclaration("var", [variableDeclarator(id, statement.expression)]);
this._resultName = cloneNode(id);
return this;
}
defaultInterop() {
return this._interop(this._hub.addHelper("interopRequireDefault"));
}
wildcardInterop() {
return this._interop(this._hub.addHelper("interopRequireWildcard"));
}
_interop(callee) {
const statement = this._statements[this._statements.length - 1];
if (statement.type === "ExpressionStatement") {
statement.expression = callExpression(callee, [statement.expression]);
} else if (statement.type === "VariableDeclaration") {
_assert(statement.declarations.length === 1);
statement.declarations[0].init = callExpression(callee, [statement.declarations[0].init]);
} else {
_assert.fail("Unexpected type.");
}
return this;
}
prop(name) {
const statement = this._statements[this._statements.length - 1];
if (statement.type === "ExpressionStatement") {
statement.expression = memberExpression(statement.expression, identifier(name));
} else if (statement.type === "VariableDeclaration") {
_assert(statement.declarations.length === 1);
statement.declarations[0].init = memberExpression(statement.declarations[0].init, identifier(name));
} else {
_assert.fail("Unexpected type:" + statement.type);
}
return this;
}
read(name) {
this._resultName = memberExpression(this._resultName, identifier(name));
}
}
exports.default = ImportBuilder;