Architecture refactorization.

[caarmen]

Architecture redesign

Redesign the architecture into layers.

• Top-level: entry points (routes and tasks)
• Middle-level: domain (use cases)
• Lower-levels:
  • data (repositories)
  • remote services
• Spanning multiple levels: core, oauth

Add mermaid diagrams.

Tests

Add tests to cover most of the app (97% coverage currently).

Other changes

• Use templates instead of string literals for successful connection pages.
• Use more modern asyncio apis for the fitbit scheduler.

[caarmen]

Rough sketch of architecture in progress:

macro view

flowchart TB
    subgraph main
    end
    subgraph routes
    end

    subgraph tasks
    end

    subgraph domain
    end
    %%subgraph core
    %%end
    subgraph data
    end


    subgraph remoteservices
    end
    subgraph oauth
    end

    domain --> remoteservices
    domain --> data
    %%domain --> core




    %%remoteservices --> core
    remoteservices --> oauth
    %%oauth --> core


    routes --> domain


    tasks --> domain

    main --> routes
    main --> tasks

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detailed view

flowchart TB
    subgraph main
    end
    subgraph routes
        subgraph withingsroutes
        end
        subgraph fitbitroutes
        end
    end

    subgraph tasks
        subgraph fitbittasks
        end
    end

    subgraph logger
    end
    subgraph settings
    end
    subgraph domain
        domainmodels[models]
        usecases
        modelmappers
    end
    subgraph core
        coremodels[models]
        exceptions
    end
    subgraph data
        subgraph repositories
            withingsrepository
            fitbitrepository
            repomodels[models]
        end
        subgraph database
            connection
            dbmodels[models]
        end
    end


    subgraph remoteservices
        fitbitapi
        withingsapi
    end
    subgraph oauth
        withingsoauth
        fitbitoauth
        oauth2[oauth]
    end

    repositories --> database


    usecases --> domainmodels
    usecases --> repositories
    usecases --> remoteservices
    usecases --> core
    modelmappers --> coremodels
    modelmappers --> domainmodels
    modelmappers --> repomodels


    fitbitoauth --> oauth2
    withingsoauth --> oauth2
    remoteservices --> core
    remoteservices --> oauth



    withingsroutes --> usecases
    fitbitroutes --> usecases


    fitbittasks --> usecases

    main --> routes
    main --> tasks
    main --> settings
    main --> logger

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