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node_modules/ts-mixer/dist/cjs/mixin-tracking.js

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+"use strict";
+Object.defineProperty(exports, "__esModule", { value: true });
+exports.hasMixin = exports.registerMixins = exports.getMixinsForClass = void 0;
+const util_1 = require("./util");
+// Keeps track of constituent classes for every mixin class created by ts-mixer.
+const mixins = new Map();
+const getMixinsForClass = (clazz) => mixins.get(clazz);
+exports.getMixinsForClass = getMixinsForClass;
+const registerMixins = (mixedClass, constituents) => mixins.set(mixedClass, constituents);
+exports.registerMixins = registerMixins;
+const hasMixin = (instance, mixin) => {
+    if (instance instanceof mixin)
+        return true;
+    const constructor = instance.constructor;
+    const visited = new Set();
+    let frontier = new Set();
+    frontier.add(constructor);
+    while (frontier.size > 0) {
+        // check if the frontier has the mixin we're looking for.  if not, we can say we visited every item in the frontier
+        if (frontier.has(mixin))
+            return true;
+        frontier.forEach(item => visited.add(item));
+        // build a new frontier based on the associated mixin classes and prototype chains of each frontier item
+        const newFrontier = new Set();
+        frontier.forEach(item => {
+            var _a;
+            const itemConstituents = (_a = mixins.get(item)) !== null && _a !== void 0 ? _a : util_1.protoChain(item.prototype).map(proto => proto.constructor).filter(item => item !== null);
+            if (itemConstituents)
+                itemConstituents.forEach(constituent => {
+                    if (!visited.has(constituent) && !frontier.has(constituent))
+                        newFrontier.add(constituent);
+                });
+        });
+        // we have a new frontier, now search again
+        frontier = newFrontier;
+    }
+    // if we get here, we couldn't find the mixin anywhere in the prototype chain or associated mixin classes
+    return false;
+};
+exports.hasMixin = hasMixin;