57 lines
1.2 KiB
JavaScript
57 lines
1.2 KiB
JavaScript
"use strict";
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/* jshint maxparams:7 */
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module.exports = TraversalContext;
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var TraversalPath = require("./path");
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var flatten = require("lodash/array/flatten");
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var compact = require("lodash/array/compact");
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function TraversalContext(scope, opts, state, parentPath) {
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this.shouldFlatten = false;
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this.parentPath = parentPath;
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this.scope = scope;
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this.state = state;
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this.opts = opts;
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}
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TraversalContext.prototype.flatten = function () {
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this.shouldFlatten = true;
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};
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TraversalContext.prototype.visitNode = function (node, obj, key) {
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var iteration = new TraversalPath(this, node, obj, key);
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return iteration.visit();
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};
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TraversalContext.prototype.visit = function (node, key) {
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var nodes = node[key];
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if (!nodes) return;
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if (!Array.isArray(nodes)) {
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return this.visitNode(node, node, key);
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}
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// nothing to traverse!
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if (nodes.length === 0) {
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return;
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}
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for (var i = 0; i < nodes.length; i++) {
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if (nodes[i] && this.visitNode(node, nodes, i)) {
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return true;
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}
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}
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if (this.shouldFlatten) {
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node[key] = flatten(node[key]);
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if (key === "body") {
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// we can safely compact this
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node[key] = compact(node[key]);
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}
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}
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};
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