[6a3a178] | 1 | "use strict";
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| 2 |
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| 3 | Object.defineProperty(exports, "__esModule", {
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| 4 | value: true
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| 5 | });
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| 6 | exports.explode = explode;
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| 7 | exports.verify = verify;
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| 8 | exports.merge = merge;
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| 9 |
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| 10 | var virtualTypes = require("./path/lib/virtual-types");
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| 11 |
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| 12 | var _t = require("@babel/types");
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| 13 |
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| 14 | const {
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| 15 | DEPRECATED_KEYS,
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| 16 | FLIPPED_ALIAS_KEYS,
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| 17 | TYPES
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| 18 | } = _t;
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| 19 |
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| 20 | function explode(visitor) {
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| 21 | if (visitor._exploded) return visitor;
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| 22 | visitor._exploded = true;
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| 23 |
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| 24 | for (const nodeType of Object.keys(visitor)) {
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| 25 | if (shouldIgnoreKey(nodeType)) continue;
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| 26 | const parts = nodeType.split("|");
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| 27 | if (parts.length === 1) continue;
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| 28 | const fns = visitor[nodeType];
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| 29 | delete visitor[nodeType];
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| 30 |
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| 31 | for (const part of parts) {
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| 32 | visitor[part] = fns;
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| 33 | }
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| 34 | }
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| 35 |
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| 36 | verify(visitor);
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| 37 | delete visitor.__esModule;
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| 38 | ensureEntranceObjects(visitor);
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| 39 | ensureCallbackArrays(visitor);
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| 40 |
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| 41 | for (const nodeType of Object.keys(visitor)) {
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| 42 | if (shouldIgnoreKey(nodeType)) continue;
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| 43 | const wrapper = virtualTypes[nodeType];
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| 44 | if (!wrapper) continue;
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| 45 | const fns = visitor[nodeType];
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| 46 |
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| 47 | for (const type of Object.keys(fns)) {
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| 48 | fns[type] = wrapCheck(wrapper, fns[type]);
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| 49 | }
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| 50 |
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| 51 | delete visitor[nodeType];
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| 52 |
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| 53 | if (wrapper.types) {
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| 54 | for (const type of wrapper.types) {
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| 55 | if (visitor[type]) {
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| 56 | mergePair(visitor[type], fns);
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| 57 | } else {
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| 58 | visitor[type] = fns;
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| 59 | }
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| 60 | }
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| 61 | } else {
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| 62 | mergePair(visitor, fns);
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| 63 | }
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| 64 | }
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| 65 |
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| 66 | for (const nodeType of Object.keys(visitor)) {
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| 67 | if (shouldIgnoreKey(nodeType)) continue;
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| 68 | const fns = visitor[nodeType];
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| 69 | let aliases = FLIPPED_ALIAS_KEYS[nodeType];
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| 70 | const deprecatedKey = DEPRECATED_KEYS[nodeType];
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| 71 |
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| 72 | if (deprecatedKey) {
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| 73 | console.trace(`Visitor defined for ${nodeType} but it has been renamed to ${deprecatedKey}`);
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| 74 | aliases = [deprecatedKey];
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| 75 | }
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| 76 |
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| 77 | if (!aliases) continue;
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| 78 | delete visitor[nodeType];
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| 79 |
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| 80 | for (const alias of aliases) {
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| 81 | const existing = visitor[alias];
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| 82 |
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| 83 | if (existing) {
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| 84 | mergePair(existing, fns);
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| 85 | } else {
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| 86 | visitor[alias] = Object.assign({}, fns);
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| 87 | }
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| 88 | }
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| 89 | }
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| 90 |
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| 91 | for (const nodeType of Object.keys(visitor)) {
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| 92 | if (shouldIgnoreKey(nodeType)) continue;
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| 93 | ensureCallbackArrays(visitor[nodeType]);
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| 94 | }
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| 95 |
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| 96 | return visitor;
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| 97 | }
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| 98 |
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| 99 | function verify(visitor) {
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| 100 | if (visitor._verified) return;
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| 101 |
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| 102 | if (typeof visitor === "function") {
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| 103 | throw new Error("You passed `traverse()` a function when it expected a visitor object, " + "are you sure you didn't mean `{ enter: Function }`?");
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| 104 | }
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| 105 |
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| 106 | for (const nodeType of Object.keys(visitor)) {
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| 107 | if (nodeType === "enter" || nodeType === "exit") {
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| 108 | validateVisitorMethods(nodeType, visitor[nodeType]);
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| 109 | }
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| 110 |
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| 111 | if (shouldIgnoreKey(nodeType)) continue;
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| 112 |
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| 113 | if (TYPES.indexOf(nodeType) < 0) {
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| 114 | throw new Error(`You gave us a visitor for the node type ${nodeType} but it's not a valid type`);
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| 115 | }
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| 116 |
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| 117 | const visitors = visitor[nodeType];
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| 118 |
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| 119 | if (typeof visitors === "object") {
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| 120 | for (const visitorKey of Object.keys(visitors)) {
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| 121 | if (visitorKey === "enter" || visitorKey === "exit") {
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| 122 | validateVisitorMethods(`${nodeType}.${visitorKey}`, visitors[visitorKey]);
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| 123 | } else {
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| 124 | throw new Error("You passed `traverse()` a visitor object with the property " + `${nodeType} that has the invalid property ${visitorKey}`);
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| 125 | }
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| 126 | }
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| 127 | }
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| 128 | }
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| 129 |
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| 130 | visitor._verified = true;
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| 131 | }
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| 132 |
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| 133 | function validateVisitorMethods(path, val) {
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| 134 | const fns = [].concat(val);
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| 135 |
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| 136 | for (const fn of fns) {
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| 137 | if (typeof fn !== "function") {
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| 138 | throw new TypeError(`Non-function found defined in ${path} with type ${typeof fn}`);
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| 139 | }
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| 140 | }
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| 141 | }
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| 142 |
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| 143 | function merge(visitors, states = [], wrapper) {
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| 144 | const rootVisitor = {};
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| 145 |
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| 146 | for (let i = 0; i < visitors.length; i++) {
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| 147 | const visitor = visitors[i];
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| 148 | const state = states[i];
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| 149 | explode(visitor);
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| 150 |
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| 151 | for (const type of Object.keys(visitor)) {
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| 152 | let visitorType = visitor[type];
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| 153 |
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| 154 | if (state || wrapper) {
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| 155 | visitorType = wrapWithStateOrWrapper(visitorType, state, wrapper);
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| 156 | }
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| 157 |
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| 158 | const nodeVisitor = rootVisitor[type] = rootVisitor[type] || {};
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| 159 | mergePair(nodeVisitor, visitorType);
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| 160 | }
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| 161 | }
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| 162 |
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| 163 | return rootVisitor;
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| 164 | }
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| 165 |
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| 166 | function wrapWithStateOrWrapper(oldVisitor, state, wrapper) {
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| 167 | const newVisitor = {};
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| 168 |
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| 169 | for (const key of Object.keys(oldVisitor)) {
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| 170 | let fns = oldVisitor[key];
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| 171 | if (!Array.isArray(fns)) continue;
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| 172 | fns = fns.map(function (fn) {
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| 173 | let newFn = fn;
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| 174 |
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| 175 | if (state) {
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| 176 | newFn = function (path) {
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| 177 | return fn.call(state, path, state);
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| 178 | };
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| 179 | }
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| 180 |
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| 181 | if (wrapper) {
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| 182 | newFn = wrapper(state.key, key, newFn);
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| 183 | }
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| 184 |
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| 185 | if (newFn !== fn) {
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| 186 | newFn.toString = () => fn.toString();
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| 187 | }
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| 188 |
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| 189 | return newFn;
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| 190 | });
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| 191 | newVisitor[key] = fns;
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| 192 | }
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| 193 |
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| 194 | return newVisitor;
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| 195 | }
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| 196 |
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| 197 | function ensureEntranceObjects(obj) {
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| 198 | for (const key of Object.keys(obj)) {
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| 199 | if (shouldIgnoreKey(key)) continue;
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| 200 | const fns = obj[key];
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| 201 |
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| 202 | if (typeof fns === "function") {
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| 203 | obj[key] = {
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| 204 | enter: fns
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| 205 | };
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| 206 | }
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| 207 | }
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| 208 | }
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| 209 |
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| 210 | function ensureCallbackArrays(obj) {
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| 211 | if (obj.enter && !Array.isArray(obj.enter)) obj.enter = [obj.enter];
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| 212 | if (obj.exit && !Array.isArray(obj.exit)) obj.exit = [obj.exit];
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| 213 | }
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| 214 |
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| 215 | function wrapCheck(wrapper, fn) {
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| 216 | const newFn = function (path) {
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| 217 | if (wrapper.checkPath(path)) {
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| 218 | return fn.apply(this, arguments);
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| 219 | }
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| 220 | };
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| 221 |
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| 222 | newFn.toString = () => fn.toString();
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| 223 |
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| 224 | return newFn;
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| 225 | }
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| 226 |
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| 227 | function shouldIgnoreKey(key) {
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| 228 | if (key[0] === "_") return true;
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| 229 | if (key === "enter" || key === "exit" || key === "shouldSkip") return true;
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| 230 |
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| 231 | if (key === "denylist" || key === "noScope" || key === "skipKeys" || key === "blacklist") {
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| 232 | return true;
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| 233 | }
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| 234 |
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| 235 | return false;
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| 236 | }
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| 237 |
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| 238 | function mergePair(dest, src) {
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| 239 | for (const key of Object.keys(src)) {
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| 240 | dest[key] = [].concat(dest[key] || [], src[key]);
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| 241 | }
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| 242 | } |
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