var t = require("../../types");
var _ = require("lodash");
var getSpreadLiteral = function (spread, file) {
return file.toArray(spread.argument);
};
var hasSpread = function (nodes) {
var has = false;
_.each(nodes, function (node) {
if (t.isSpreadElement(node)) {
has = true;
return false;
}
});
return has;
};
var build = function (props, file) {
var nodes = [];
var _props = [];
var push = function () {
if (!_props.length) return;
nodes.push(t.arrayExpression(_props));
_props = [];
};
_.each(props, function (prop) {
if (t.isSpreadElement(prop)) {
push();
nodes.push(getSpreadLiteral(prop, file));
} else {
_props.push(prop);
}
});
push();
return nodes;
};
exports.ArrayExpression = function (node, parent, file) {
var elements = node.elements;
if (!hasSpread(elements)) return;
var nodes = build(elements, file);
var first = nodes.shift();
if (!t.isArrayExpression(first)) {
nodes.unshift(first);
first = t.arrayExpression([]);
}
return t.callExpression(t.memberExpression(first, t.identifier("concat")), nodes);
};
exports.CallExpression = function (node, parent, file) {
var args = node.arguments;
if (!hasSpread(args)) return;
var contextLiteral = t.literal(null);
node.arguments = [];
var nodes = build(args, file);
var first = nodes.shift();
if (nodes.length) {
node.arguments.push(t.callExpression(t.memberExpression(first, t.identifier("concat")), nodes));
} else {
node.arguments.push(first);
}
var callee = node.callee;
if (t.isMemberExpression(callee)) {
contextLiteral = callee.object;
if (callee.computed) {
callee.object = t.memberExpression(callee.object, callee.property, true);
callee.property = t.identifier("apply");
callee.computed = false;
} else {
callee.property = t.memberExpression(callee.property, t.identifier("apply"));
}
} else {
node.callee = t.memberExpression(node.callee, t.identifier("apply"));
}
node.arguments.unshift(contextLiteral);
};
exports.NewExpression = function (node, parent, file) {
var args = node.arguments;
if (!hasSpread(args)) return;
var nodes = build(args, file);
var first = nodes.shift();
if (nodes.length) {
args = t.callExpression(t.memberExpression(first, t.identifier("concat")), nodes);
} else {
args = first;
}
return t.callExpression(file.addDeclaration("apply-constructor"), [node.callee, args]);
};
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