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node_modules/apollo-utilities/lib/util/mergeDeep.js

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+"use strict";
+Object.defineProperty(exports, "__esModule", { value: true });
+var tslib_1 = require("tslib");
+var hasOwnProperty = Object.prototype.hasOwnProperty;
+function mergeDeep() {
+    var sources = [];
+    for (var _i = 0; _i < arguments.length; _i++) {
+        sources[_i] = arguments[_i];
+    }
+    return mergeDeepArray(sources);
+}
+exports.mergeDeep = mergeDeep;
+function mergeDeepArray(sources) {
+    var target = sources[0] || {};
+    var count = sources.length;
+    if (count > 1) {
+        var pastCopies = [];
+        target = shallowCopyForMerge(target, pastCopies);
+        for (var i = 1; i < count; ++i) {
+            target = mergeHelper(target, sources[i], pastCopies);
+        }
+    }
+    return target;
+}
+exports.mergeDeepArray = mergeDeepArray;
+function isObject(obj) {
+    return obj !== null && typeof obj === 'object';
+}
+function mergeHelper(target, source, pastCopies) {
+    if (isObject(source) && isObject(target)) {
+        if (Object.isExtensible && !Object.isExtensible(target)) {
+            target = shallowCopyForMerge(target, pastCopies);
+        }
+        Object.keys(source).forEach(function (sourceKey) {
+            var sourceValue = source[sourceKey];
+            if (hasOwnProperty.call(target, sourceKey)) {
+                var targetValue = target[sourceKey];
+                if (sourceValue !== targetValue) {
+                    target[sourceKey] = mergeHelper(shallowCopyForMerge(targetValue, pastCopies), sourceValue, pastCopies);
+                }
+            }
+            else {
+                target[sourceKey] = sourceValue;
+            }
+        });
+        return target;
+    }
+    return source;
+}
+function shallowCopyForMerge(value, pastCopies) {
+    if (value !== null &&
+        typeof value === 'object' &&
+        pastCopies.indexOf(value) < 0) {
+        if (Array.isArray(value)) {
+            value = value.slice(0);
+        }
+        else {
+            value = tslib_1.__assign({ __proto__: Object.getPrototypeOf(value) }, value);
+        }
+        pastCopies.push(value);
+    }
+    return value;
+}
+//# sourceMappingURL=mergeDeep.js.map