#1407 Checkout Implemented Memorize Decorator

apps/utils/common/src/lib/index.ts

@@ -4,4 +4,5 @@ export * from './is-boolean';
 export * from './is-null-or-undefined';
 export * from './is-number';
 export * from './is-string';
+export * from './memorize.decorator';
 // end:ng42.barrel

apps/utils/common/src/lib/memorize.decorator.ts

@@ -0,0 +1,26 @@
+import _ from 'lodash';
+import { v4 } from 'uuid';
+
+const memorizeCache: { ttl: number; result: any; args: any[]; id: string }[] = [];
+
+export function memorize(options?: { ttl?: number; comparer?: (current: any[], prev: any[]) => boolean }): MethodDecorator {
+  const id = v4();
+  const comparer = options?.comparer || _.isEqual;
+  const ttl = options?.ttl || Infinity;
+  return (target: Object, propertyKey: string, descriptor: TypedPropertyDescriptor<any>): TypedPropertyDescriptor<any> => {
+    const currentMethod = descriptor.value;
+    descriptor.value = function (...args: any[]) {
+      const cacheIndex = memorizeCache.findIndex((c) => c.id === id && comparer(c.args, args));
+      const cache = memorizeCache[cacheIndex];
+      if (cache && cache.ttl > Date.now()) {
+        return cache.result;
+      } else if (cache) {
+        memorizeCache.splice(cacheIndex, 1);
+      }
+      const result = currentMethod.apply(this, args);
+      memorizeCache.push({ ttl: Date.now() + ttl, result, args, id });
+      return result;
+    };
+    return descriptor;
+  };
+}

package-lock.json

@@ -5568,6 +5568,12 @@
       "integrity": "sha512-3c+yGKvVP5Y9TYBEibGNR+kLtijnj7mYrXRg+WpFb2X9xm04g/DXYkfg4hmzJQosc9snFNUPkbYIhu+KAm6jJw==",
       "dev": true
     },
+    "@types/lodash": {
+      "version": "4.14.168",
+      "resolved": "https://registry.npmjs.org/@types/lodash/-/lodash-4.14.168.tgz",
+      "integrity": "sha512-oVfRvqHV/V6D1yifJbVRU3TMp8OT6o6BG+U9MkwuJ3U8/CsDHvalRpsxBqivn71ztOFZBTfJMvETbqHiaNSj7Q==",
+      "dev": true
+    },
     "@types/minimatch": {
       "version": "3.0.3",
       "resolved": "https://pkgs.dev.azure.com/hugendubel/_packaging/hugendubel/npm/registry/@types/minimatch/-/minimatch-3.0.3.tgz",
@@ -5631,6 +5637,12 @@
       "integrity": "sha1-nAiGeYdvN061mD8VDUeHqm+zLX4=",
       "dev": true
     },
+    "@types/uuid": {
+      "version": "8.3.0",
+      "resolved": "https://registry.npmjs.org/@types/uuid/-/uuid-8.3.0.tgz",
+      "integrity": "sha512-eQ9qFW/fhfGJF8WKHGEHZEyVWfZxrT+6CLIJGBcZPfxUh/+BnEj+UCGYMlr9qZuX/2AltsvwrGqp0LhEW8D0zQ==",
+      "dev": true
+    },
     "@types/webpack-sources": {
       "version": "0.1.8",
       "resolved": "https://registry.npmjs.org/@types/webpack-sources/-/webpack-sources-0.1.8.tgz",
@@ -12910,9 +12922,9 @@
       }
     },
     "lodash": {
-      "version": "4.17.20",
-      "resolved": "https://registry.npmjs.org/lodash/-/lodash-4.17.20.tgz",
-      "integrity": "sha512-PlhdFcillOINfeV7Ni6oF1TAEayyZBoZ8bcshTHqOYJYlrqzRK5hagpagky5o4HfCzzd1TRkXPMFq6cKk9rGmA=="
+      "version": "4.17.21",
+      "resolved": "https://registry.npmjs.org/lodash/-/lodash-4.17.21.tgz",
+      "integrity": "sha512-v2kDEe57lecTulaDIuNTPy3Ry4gLGJ6Z1O3vE1krgXZNrsQ+LFTGHVxVjcXPs17LhbZVGedAJv8XZ1tvj5FvSg=="
     },
     "lodash.memoize": {
       "version": "4.1.2",
@@ -18271,6 +18283,13 @@
         "tough-cookie": "~2.4.3",
         "tunnel-agent": "^0.6.0",
         "uuid": "^3.3.2"
+      },
+      "dependencies": {
+        "uuid": {
+          "version": "3.4.0",
+          "resolved": "https://registry.npmjs.org/uuid/-/uuid-3.4.0.tgz",
+          "integrity": "sha512-HjSDRw6gZE5JMggctHBcjVak08+KEVhSIiDzFnT9S9aegmp85S/bReBVTb4QTFaRNptJ9kuYaNhnbNEOkbKb/A=="
+        }
       }
     },
     "require-directory": {
@@ -21743,6 +21762,12 @@
             "psl": "^1.1.28",
             "punycode": "^2.1.1"
           }
+        },
+        "uuid": {
+          "version": "3.4.0",
+          "resolved": "https://registry.npmjs.org/uuid/-/uuid-3.4.0.tgz",
+          "integrity": "sha512-HjSDRw6gZE5JMggctHBcjVak08+KEVhSIiDzFnT9S9aegmp85S/bReBVTb4QTFaRNptJ9kuYaNhnbNEOkbKb/A==",
+          "dev": true
         }
       }
     },
@@ -21900,9 +21925,9 @@
       "dev": true
     },
     "uuid": {
-      "version": "3.3.2",
-      "resolved": "https://registry.npmjs.org/uuid/-/uuid-3.3.2.tgz",
-      "integrity": "sha512-yXJmeNaw3DnnKAOKJE51sL/ZaYfWJRl1pK9dr19YFCu0ObS231AB1/LbqTKRAQ5kw8A90rA6fr4riOUpTZvQZA=="
+      "version": "8.3.2",
+      "resolved": "https://registry.npmjs.org/uuid/-/uuid-8.3.2.tgz",
+      "integrity": "sha512-+NYs2QeMWy+GWFOEm9xnn6HCDp0l7QBD7ml8zLUmJ+93Q5NF0NocErnwkTkXVFNiX3/fpC6afS8Dhb/gz7R7eg=="
     },
     "v8-compile-cache": {
       "version": "2.1.1",
@@ -22579,6 +22604,12 @@
           "resolved": "https://registry.npmjs.org/ansi-colors/-/ansi-colors-3.2.4.tgz",
           "integrity": "sha512-hHUXGagefjN2iRrID63xckIvotOXOojhQKWIPUZ4mNUZ9nLZW+7FMNoE1lOkEhNWYsx/7ysGIuJYCiMAA9FnrA==",
           "dev": true
+        },
+        "uuid": {
+          "version": "3.4.0",
+          "resolved": "https://registry.npmjs.org/uuid/-/uuid-3.4.0.tgz",
+          "integrity": "sha512-HjSDRw6gZE5JMggctHBcjVak08+KEVhSIiDzFnT9S9aegmp85S/bReBVTb4QTFaRNptJ9kuYaNhnbNEOkbKb/A==",
+          "dev": true
         }
       }
     },

package.json

@@ -64,6 +64,7 @@
     "faker": "^4.1.0",
     "hammerjs": "^2.0.8",
     "intersection-observer": "^0.11.0",
+    "lodash": "^4.17.21",
     "ng-connection-service": "^1.0.4",
     "ngx-infinite-scroll": "^7.2.0",
     "ngx-perfect-scrollbar": "^7.2.1",
@@ -76,6 +77,7 @@
     "socket.io": "^2.2.0",
     "tslib": "^2.0.0",
     "uglify-js": "^3.4.9",
+    "uuid": "^8.3.2",
     "web-animations-js": "^2.3.2",
     "zone.js": "~0.10.2"
   },
@@ -90,7 +92,9 @@
     "@ngxs/logger-plugin": "^3.6.2",
     "@types/jasmine": "^2.8.16",
     "@types/jasminewd2": "~2.0.3",
+    "@types/lodash": "^4.14.168",
     "@types/node": "^12.11.1",
+    "@types/uuid": "^8.3.0",
     "codelyzer": "^5.1.2",
     "husky": "^4.2.3",
     "jasmine-core": "~3.5.0",

tsconfig.json

@@ -11,6 +11,7 @@
     "emitDecoratorMetadata": true,
     "experimentalDecorators": true,
     "importHelpers": false,
+    "allowSyntheticDefaultImports": true,
     "target": "es5",
     "typeRoots": [
       "node_modules/@types"