Use C4 architecture concept for dashboard zoom levels

[bittner]

To make the main work and information area just as consistent as logical to use, just as intuitively useful as consistently structured, just as informative as self-explanatory, the project dashboard should implement (at maximum) 4 zoom levels for system and sensor details, inspired by the C4 architecture concept.

Zoom Levels

1. Context – Overview; (plugin information feeds into a map that) helps to understand how the project fits into the world around it; "C-level Management view"
2. Containers – Software system; (plugin information feeds into a map of) all high-level technical building blocks; "Project Management view"
3. Components – Individual container; (plugin information feeds into a map of) all components of a specific container; "System Engineering view"
4. Code – Low-level details; e.g. exceptions, error or info log details, update rate timestamps, etc.; "Developer view"

To avoid confusion, make to dashboard feel natural, and because the application use might be very specific to success monitoring, the default zoom level may be 2 "containers".

Implementation

• Every sensor plugin must expose (or use) API functions feeding information into the 4 zoom levels. The information payload details may be empty (e.g. if nothing makes sense to display). How to represent the data visually on the UI may be specified by a rendering class.
• A success status should be reported separately from the zoom levels (as this information is independent from the level of detail).