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@tc-libs/file-handler

v3.6.1

Published

Layer applicativo sopra `@tc-libs/file` e `@tc-libs/storage` per elaborazione e persistenza file.

Readme

@tc-libs/file-handler

Layer applicativo sopra @tc-libs/file e @tc-libs/storage per elaborazione e persistenza file.

Espone:

  • FileHandlerModule
  • FileHandlerService
  • FileHandlerTextService
  • FileHandlerVideoService

Registrazione

FileHandlerModule.register(
  {
    image: {
      quality: 80,
    },
    resizes: [
      { suffix: 'thumb', width: 256, height: 256 },
    ],
  },
  true,
);

FileHandlerService

Funzioni principali:

  • convertToBytes('10MB')
  • handleFile(file, options?)
  • handleFiles(files)
  • getFileInfo(file)
  • hashName(name)

Nel codice attuale il flusso principale implementato riguarda soprattutto le immagini:

  • upload su storage
  • eventuali resize
  • generazione nome hashato

FileHandlerTextService

Permette di estrarre testo da:

  • plain text
  • ODT
  • PDF
  • DOCX
  • PowerPoint

Esempio:

const text = await this.fileHandlerTextService.extractText(file);

FileHandlerVideoService

Funzioni principali:

  • getDuration(buffer, filename)
  • convertToLowQualityAudio(...)
  • convertToLowQualityVideo(...)
  • generateThumbnail(...)

Richiede ffmpeg/ffprobe disponibili nell'ambiente.

Nota operativa

L'entry service FileHandlerService oggi gestisce soprattutto immagini; i rami video/audio nel metodo handleFile sono commentati, quindi per quei casi va usato direttamente FileHandlerVideoService o estesa la logica.

Sviluppo

nx build file-handler
nx test file-handler