upload attachment

src/app/module/chat/domain/use-case/message-attachment-by-message-id.service.ts

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+import { Injectable } from '@angular/core';
+import { z } from 'zod';
+import { AttachmentRemoteDataSourceService } from 'src/app/module/chat/data/data-source/attachment/attachment-remote-data-source.service'
+import { AttachmentLocalDataSource } from 'src/app/module/chat/data/data-source/attachment/attachment-local-data-source.service'
+import { convertBlobToDataURL } from 'src/app/utils/ToBase64';
+import { Result } from 'neverthrow';
+
+const MessageAttachmentByMessageIdSchema = z.object({
+  $messageId: z.number(),
+  id: z.string()
+})
+
+export type MessageAttachmentByMessageIdInput = z.infer<typeof MessageAttachmentByMessageIdSchema>
+
+@Injectable({
+  providedIn: 'root'
+})
+export class MessageAttachmentByMessageIdUseCase {
+
+  constructor(
+    private AttachmentRemoteDataSourceService: AttachmentRemoteDataSourceService,
+    private AttachmentLocalDataSource: AttachmentLocalDataSource
+  ) { }
+
+  async execute(input: MessageAttachmentByMessageIdInput): Promise<Result<string, any>> {
+
+    const getLocalAttachment = await this.AttachmentLocalDataSource.findOne({
+      $messageId: input.$messageId
+    })
+
+    if(getLocalAttachment.isOk() && getLocalAttachment.value) {
+      if(getLocalAttachment.value) {
+        console.log('found local', getLocalAttachment.value)
+        return getLocalAttachment.map(e => e.file)
+      }
+    } else {
+      const result = await this.AttachmentRemoteDataSourceService.getAttachment(input)
+      return result.asyncMap(async (e) => {
+
+        const dataUrl = await convertBlobToDataURL(e)
+
+        this.AttachmentLocalDataSource.insert({
+          $messageId: input.$messageId,
+          id: input.id,
+          file: dataUrl
+        })
+
+        return dataUrl
+      })
+    }
+    
+  }
+}