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by Mathieu
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DownloadFileQueryHandler.execute   A

↳ Parent: DownloadFileQueryHandler

Complexity

Conditions 3

Size

Total Lines 16
Code Lines 14

Duplication

Lines 0
Ratio 0 %

Importance

Changes 0
Metric Value
eloc 14
dl 0
loc 16
rs 9.7
c 0
b 0
f 0
cc 3
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import {Inject} from '@nestjs/common';
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import {QueryHandler} from '@nestjs/cqrs';
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import {IFileRepository} from 'src/Domain/File/Repository/IFileRepository';
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import {DownloadFileQuery} from './DownloadFileQuery';
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import {IFileStorage} from 'src/Application/IFileStorage';
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import {DownloadedFileView} from '../View/DownloadedFileView';
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import {FileNotFoundException} from 'src/Domain/File/Exception/FileNotFoundException';
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@QueryHandler(DownloadFileQuery)

            


            
                                                                                                            
                            
            
                                    
            
            

                
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export class DownloadFileQueryHandler {

            


            
                                                                                                            
                            
            
                                    
            
            

                
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  constructor(

            


            
                                                                                                            
                            
            
                                    
            
            

                
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    @Inject('IFileRepository')

            


            
                                                                                                            
                            
            
                                    
            
            

                
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    private readonly fileRepository: IFileRepository,

            


            
                                                                                                            
                            
            
                                    
            
            

                
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    @Inject('IFileStorage')

            


            
                                                                                                            
                            
            
                                    
            
            

                
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    public readonly fileStorage: IFileStorage

            


            
                                                                                                            
                                                                
            
                                    
            
            

                
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  ) {}

            


            
                                                                        
                            
            
                                    
            
            

                
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  public async execute(query: DownloadFileQuery): Promise<DownloadedFileView> {

            


            
                                                                        
                            
            
                                    
            
            

                
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    const file = await this.fileRepository.findOneById(query.id);

            


            
                                                                        
                            
            
                                    
            
            

                
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    if (!file) {

            


            
                                                                        
                            
            
                                    
            
            

                
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      throw new FileNotFoundException();

            


            
                                                                        
                            
            
                                    
            
            

                
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    }

            


            
                                                                        
                            
            
                                    
            
            

                
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    const buffer = await this.fileStorage.download(file);

            


            
                                                                        
                            
            
                                    
            
            

                
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    if (!buffer) {

            


            
                                                                        
                            
            
                                    
            
            

                
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      throw new FileNotFoundException();

            


            
                                                                        
                            
            
                                    
            
            

                
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    }

            


            
                                                                        
                            
            
                                    
            
            

                
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    return new DownloadedFileView(

            


            
                                                                        
                            
            
                                    
            
            

                
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      file.getOriginalName(),

            


            
                                                                        
                            
            
                                    
            
            

                
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      file.getMimeType(),

            


            
                                                                        
                            
            
                                    
            
            

                
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      buffer

            


            
                                                                                                            
                            
            
                                    
            
            

                
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    );

            


            
                                                                                                            
                            
            
                                    
            
            

                
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  }

            


            
                                                                                                            
                                                                
            
                                    
            
            

                
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}

            


            
                                                        
            
                                    
            
            

                
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