refactored AvatarService

static/js/services/avatar/avatar.service.impl.ts

@@ -0,0 +1,49 @@
+import { AvatarService } from './avatar.service';
+import { Injectable } from 'angular-ts-decorators';
+
+
+@Injectable(AvatarService.name)
+export class AvatarServiceImpl implements AvatarService {
+
+  private cache: {[cacheKey: string]: string} = {};
+
+  constructor(private Config: any, private md5: any) {
+
+  }
+
+  public getAvatar(hash: string, size: number = 16, notFound: string = '404'): string {
+    var avatarURL: string;
+    switch (this.Config['AVATAR_KIND']) {
+      case 'local':
+        avatarURL = `/avatar/${hash}?size=${size}`;
+        break;
+
+      case 'gravatar':
+        avatarURL = `//www.gravatar.com/avatar/${hash}?d=${notFound}&size=${size}`;
+        break;
+    }
+
+    return avatarURL;
+  }
+
+  public computeHash(email: string = '', name: string = ''): string {
+    const cacheKey: string = email + ':' + name;
+
+    if (this.cache[cacheKey]) {
+      return this.cache[cacheKey];
+    }
+
+    var hash: string = this.md5.createHash(email.toString().toLowerCase());
+    switch (this.Config['AVATAR_KIND']) {
+      case 'local':
+        if (name) {
+          hash = name[0] + hash;
+        } else if (email) {
+          hash = email[0] + hash;
+        }
+        break;
+    }
+
+    return this.cache[cacheKey] = hash;
+  }
+}