module.exports = SystemFormatter;
var DefaultFormatter = require("./_default");
var AMDFormatter = require("./amd");
var traverse = require("../../traverse");
var util = require("../../util");
var t = require("../../types");
var _ = require("lodash");
function SystemFormatter(file) {
this.exportIdentifier = file.generateUidIdentifier("export");
this.noInteropRequire = true;
AMDFormatter.apply(this, arguments);
this.moduleNameLiteral = t.literal(this.getModuleName());
}
util.inherits(SystemFormatter, AMDFormatter);
SystemFormatter.prototype.getModuleName = DefaultFormatter.prototype.getModuleName;
SystemFormatter.prototype._exportsWildcard = function (objectIdentifier) {
var leftIdentifier = t.identifier("i");
var valIdentifier = t.memberExpression(objectIdentifier, leftIdentifier, true);
var left = t.variableDeclaration("var", [
t.variableDeclarator(leftIdentifier)
]);
var right = objectIdentifier;
var block = t.blockStatement([
this.buildExportCall(leftIdentifier, valIdentifier)
]);
return t.forInStatement(left, right, block);
};
SystemFormatter.prototype._exportsAssign = function (id, init) {
return this.buildExportCall(t.literal(id.name), init, true);
};
SystemFormatter.prototype.remapExportAssignment = function (node) {
return this.buildExportCall(t.literal(node.left.name), node);
};
SystemFormatter.prototype.buildExportCall = function (id, init, isStatement) {
var call = t.callExpression(this.exportIdentifier, [id, init]);
if (isStatement) {
return t.expressionStatement(call);
} else {
return call;
}
};
SystemFormatter.prototype.buildRunnerSetters = function () {
return t.arrayExpression(_.map(this.ids, function (uid) {
var moduleIdentifier = t.identifier("m");
return t.functionExpression(null, [moduleIdentifier], t.blockStatement([
t.assignmentExpression("=", uid, moduleIdentifier)
]));
}));
};
SystemFormatter.prototype.transform = function (ast) {
var program = ast.program;
var runner = util.template("system", {
MODULE_NAME: this.moduleNameLiteral,
MODULE_DEPENDENCIES: t.arrayExpression(this.buildDependencyLiterals()),
EXPORT_IDENTIFIER: this.exportIdentifier,
SETTERS: this.buildRunnerSetters(),
EXECUTE: t.functionExpression(null, [], t.blockStatement(program.body))
}, true);
var handlerBody = runner.expression.arguments[2].body.body;
var returnStatement = handlerBody.pop();
// hoist up function declarations for circular references
traverse(program, {
enter: function (node) {
if (t.isFunction(node)) this.stop();
if (t.isFunctionDeclaration(node) || node._blockHoist) {
handlerBody.push(node);
this.remove();
}
}
});
if (!_.isEmpty(this.ids)) {
handlerBody.push(t.variableDeclaration("var", _.map(this.ids, function (uid) {
return t.variableDeclarator(uid);
})));
}
handlerBody.push(returnStatement);
program.body = [runner];
};
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