json template url + file implementation.
The file contains the json template, and can contain variables that will be extracted from the json in the url. The url is fetched at regular intervals.
* Reduce code size by removing nullptr assignments
* Optimize tagDB for loops
* More tagDB optimizations
* Remove static from language arrays reducing RAM by 5128b
- Reduces Flash by 13060b
* Add missing extern in tag_db.h
* Fix deprecation warning of sntp.h
* Remove static from contentmanager, reduces RAM by 184b
* Use string reference in prepareDataAvail
- Remove some unneeded buffers
- Remove some gotos
- AP info screen content card. Can run on any tag.
- now, you can use {variables} in the 'text' entries in a json template. You can set variables via a http call. If you update a variable, all tags with a json template containing that variable get updated.
- font name in json template is more flexible. You can just use 'filename.ttf' or 'filename.vlw'. A full path is still possible.
- colors in the json template can now be set using #rrggbb color values, and using 'black', 'white' or 'red'.
- added direct output for the TFT display for the yellow esp32-s3. No file writes needed.
- added POST variable 'ttl' to json template upload and image upload, to set the next checkin time
- added /variables-demo.html to demonstrate the variables.
- json templates received from jsonupload are now saved in /current, and reused.
- known issue: 'backup db' button doesn't work due to some browser policy change. Fixing.
thanks to @steinwedel for the inspiration on the variables and some other fixes.
- new: tagtypes are be defined via json in /tagtypes instead of hardcoded
- content template is moved to the tagtype definition
- optimalisation of spr2buffer (also uses psram now, if available)
- bugfixes in spiffseditor
- size fix in painter screen for large screens
- small layout fix current weather on 4.2"
- qr code content enabled again
- turned off temperature on esp32
- http 409 on http POST during OTA
- finetuning buitenradar scale and refresh time
- follow redirects on jsontemplate http call
- added Swedish å Å to Bahnschrift20 and 30
- option to turn dither on/off in 'static image'
- major overhaul of contentmanager.cpp, content is now generated from json template.
- fallback to 1bpp for 4.2" when no psram
- added 4.2" content layouts
- fixed small apconfig bug
- pause content generation for 60 seconds after crash, to prevent uncontrollable boot loop
- disable useless compiler warnings in fastled and tft_espi
- web preview thumbnail fix
- faster tag updates while webpage is displayed
- fixed tag fw ota update
