Initial move

frontend/src/model/channel.ts

@@ -0,0 +1,60 @@
+import { IMessage, Message } from "./message";
+
+export interface IChannel {
+    id: number;
+    name: string;
+    messages: IMessage[];
+    createdAt: number;
+}
+
+export class Channel implements IChannel {
+    id: number;
+    name: string;
+    messages: Message[];
+    createdAt: number;
+    private messageToIdMap: Map<number, Message>;
+
+    constructor(channel: IChannel) {
+        this.id = channel.id;
+        this.name = channel.name;
+        this.messages = [];
+        this.messageToIdMap = new Map();
+        channel.messages?.forEach((msg) => this.addMessage(new Message(msg)));
+        this.createdAt = channel.createdAt;
+    }
+
+    public addMessage(message: Message): void {
+        this.messages.push(message);
+        this.messageToIdMap.set(message.id, message);
+    }
+
+    public removeMessage(messageId: number): void {
+        this.messages = this.messages.filter(message => message.id !== messageId);
+        this.messageToIdMap.delete(messageId);
+    }
+
+    public getMessage(messageId: number): Message|undefined {
+        return this.messageToIdMap.get(messageId);
+    }
+
+    public getMessageByContent(content: string): Message|undefined {
+        return this.messages.find(message => message.content === content);
+    }
+
+    public getMessages(): Message[] {
+        return this.messages;
+    }
+
+    public getMessageIds(): number[] {
+        return this.messages.map(message => message.id);
+    }
+
+    public getMessageContents(): string[] {
+        return this.messages.map(message => message.content);
+    }
+
+    public getMessageId(content: string): number|undefined {
+        const message = this.getMessageByContent(content);
+        return message ? message.id : undefined;
+    }
+}