[miele] Localization of state, program and phase

[jlaur]

Fixes #11602

Signed-off-by: Jacob Laursen jacob-github@vindvejr.dk

This pull request provides localization of state, program and phase texts. Please see linked issue for details.

Continuation of:

• [miele] State/program/phase: Add raw channels and improve text channels #11341 added support for built-in English texts where no texts are available from the XGW 3000 gateway (i.e. multicast updates and some missing texts from specific appliances and/or languages). This pull request extends this by adding full localization support.
• [miele] Clean up properties and improve reliability and performance #11423 added initial support for localization.

Primary enhancement

The XGW 3000 gateway supports English, German, French and Dutch, but with many limitations:

• Most dishwasher texts are missing (all languages).
• A lot of French texts are missing.
• Some texts are provided, but actually of no use - for example "réservé (0x0004)" for washing machine program 4 (delicates) in French.

This pull request includes as many texts in these languages as possible (and additionally Danish texts) in order to avoid fallback to English in situations where gateway could have provided a localized text.

Texts provided by the binding are delivered in the configured openHAB system language, but can also be overridden in the bridge configuration.

The provided texts are not translated, but taken from one of these sources:

• Response from the gateway when configured to target language.
• Corresponding text from the Miele Cloud binding when configured to target language.
• Text on appliance display when appliance is configured to target language.

In order to get a specific text, the appliance needs to be in the specific state or phase, so harvesting all texts is time consuming, and some texts are still lacking.

Related other changes

• Bridge status messages are now internationalized and more specific.
• LocalizedValue from gateway takes precedence over enum texts. Enum texts are always in English even when gateway is configured to some other language, so this resulted in English state texts.
• Magic temperature value -32760 °C meaning "cold" is now interpreted as 10 °C.
• Some missing strings for channel labels and descriptions have been added.

Additional changes

• Configuration reload: Previously, after changing bridge configuration, bridge thing would change status to UNKNOWN and never recover from that. Probably it was never noticed because bridge configuration is quite static. However, after adding language configuration, this problem appeared quite quickly and consistently. This has been fixed.
• Code duplication refactoring: Removed some duplicated code by extracting DeviceMetaData to separate file and implemented getMieleEnum here (previously implemented in each channel selector).

[jlaur]

@kgoderis, @kaikreuzer - FYI, this PR is ready for review. It got kind of big, but finishes the work previously done in #11341 and #11423.

It would be nice for consideration in 3.2 as IMHO it more or less makes this binding feature complete. At least everything supported by the Miele@home cloud binding is now also supported by this binding, and all features I could find in the API's are supported. This concludes all the fixes and enhancements I intended to do for the Miele binding (and some more) - at least for now. :-)

[kaikreuzer]

Wow, what a great work - thanks @jlaur for polishing this binding in all aspects!