Add a download manager

[qnga]

The DownloadManager component makes it possible to download files in the backgroud, even when the app is not started.

[CodiumAI-Agent]

PR Analysis

• 🎯 Main theme: Implementation of a download manager for the application.
• 📝 PR summary: This PR introduces a download manager to the application, allowing files to be downloaded in the background. It also includes the necessary changes to the existing codebase to accommodate this new feature, such as the addition of a DownloadRepository and modifications to the Bookshelf class. The PR also includes error handling for various scenarios related to downloading and importing publications.
• 📌 Type of PR: Enhancement
• 🧪 Relevant tests added: No
• 🔒 Security concerns: No security concerns found

PR Feedback

• 💡 General suggestions: The PR is well-structured and the code changes are in line with the stated goal of the PR. However, it would be beneficial to add tests to ensure the new functionality works as expected and to prevent potential regressions in the future. Additionally, it would be good to consider potential edge cases or failure scenarios that might occur during the download process and ensure these are handled appropriately.

• 🤖 Code feedback:

  • relevant file: test-app/src/main/java/org/readium/r2/testapp/domain/Bookshelf.kt
    suggestion: Consider breaking down the Bookshelf class into smaller, more manageable classes or components. This class is quite large and handles many different responsibilities, which could make it more difficult to maintain and debug in the future. [important]
    relevant line: class Bookshelf(

  • relevant file: test-app/src/main/java/org/readium/r2/testapp/domain/Bookshelf.kt
    suggestion: It would be beneficial to handle exceptions at a higher level, to prevent the application from crashing in case of unexpected errors during the download process. [medium]
    relevant line: } catch (e: IOException) {

  • relevant file: readium/lcp/src/main/java/org/readium/r2/lcp/LcpPublicationRetriever.kt
    suggestion: Consider adding more detailed logging for debugging purposes. This could help in identifying and resolving issues more quickly. [medium]
    relevant line: public class LcpPublicationRetriever(

  • relevant file: test-app/src/main/java/org/readium/r2/testapp/Application.kt
    suggestion: It would be good to handle potential exceptions that might occur during the initialization of the repositories and the bookshelf. This could prevent the application from crashing on startup in case of an unexpected error. [medium]
    relevant line: bookRepository =

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[mickael-menu]

LGTM, thank you 👌