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| var util = require("../util");
var b = require("ast-types").builders;
var _ = require("lodash");
var isPattern = function (id) {
return id.type === "ArrayPattern" || id.type === "ObjectPattern";
};
var buildVariableAssign = function (kind, id, init) {
return b.variableDeclaration(kind, [
b.variableDeclarator(id, init)
]);
};
var push = function (kind, nodes, pattern, parentId) {
if (pattern.type === "ObjectPattern") {
pushObjectPattern(kind, nodes, pattern, parentId);
} else Eif (pattern.type === "ArrayPattern") {
pushArrayPattern(kind, nodes, pattern, parentId);
}
};
var pushObjectPattern = function (kind, nodes, pattern, parentId) {
_.each(pattern.properties, function (prop) {
var pattern2 = prop.value;
var patternId2 = b.memberExpression(parentId, prop.key, false);
if (isPattern(pattern2)) {
push(kind, nodes, pattern2, patternId2);
} else {
nodes.push(buildVariableAssign(kind, pattern2, patternId2));
}
});
};
var pushArrayPattern = function (kind, nodes, pattern, parentId) {
_.each(pattern.elements, function (elem, i) {
Iif (!elem) return;
var newPatternId = b.memberExpression(parentId, b.literal(i), true);
if (elem.type === "Identifier") {
nodes.push(buildVariableAssign(kind, elem, newPatternId));
} else {
push(kind, nodes, elem, newPatternId);
}
});
};
var pushPattern = function (kind, nodes, pattern, parentId, generateUid) {
if (parentId.type !== "MemberExpression" && parentId.type !== "Identifier") {
var key = generateUid("ref");
nodes.push(util.template("variable-assign", {
KEY: key,
VALUE: parentId
}, true));
parentId = b.identifier(key);
}
push(kind, nodes, pattern, parentId);
};
exports.FunctionDeclaration =
exports.FunctionExpression = function (node, parent, opts, generateUid) {
var block = node.body;
var nodes = [];
node.params = node.params.map(function (pattern) {
if (!isPattern(pattern)) return pattern;
var parentId = b.identifier(generateUid("ref"));
pushPattern("var", nodes, pattern, parentId, generateUid);
return parentId;
});
block.body = nodes.concat(block.body);
};
exports.VariableDeclaration = function (node, parent, opts, generateUid) {
var nodes = [];
var hasPattern = false;
_.each(node.declarations, function (declar) {
if (isPattern(declar.id)) {
hasPattern = true;
return false;
}
});
if (!hasPattern) return;
_.each(node.declarations, function (declar) {
var patternId = declar.init;
var pattern = declar.id;
if (isPattern(pattern)) {
pushPattern(node.kind, nodes, pattern, patternId, generateUid);
} else {
nodes.push(buildVariableAssign(node.kind, declar.id, declar.init));
}
});
return nodes;
};
|