Meta: Client API feature request summary

This is a meta issue that summarizes all the current API related feature requests and attempts to organize them and give some extra commentary. I plan to update this issue with new requests and when existing ones are closed.

File Metadata

• Client API: Change Archive/Inbox and Trash state for files #393
  • This seems fairly simple and would be very useful immediately for a number of existing uses of the API.
• Use BlurHash in Hydrus #394
• Client API: notes #346
  • This would probably involve being able to (perhaps optionally) get the notes of a file through the metadata API or a separate API and another API for setting the notes on a file.
• Client API: more file metadata #345
  • Time imported and whatever other metadata is not currently returned by the file_metadata endpoint
  • May need to be behind another query parameter for performance if some metadata needs to be calculated before being returned.

Search

• Client API: searching via system predicates #351
  • Basic system predicates
  • sorting
• Sorting in API search #236
• Client API: Search wildcards #654
• Support for OR Logic Conditions in Client API #854
• Client API: /get_files/search_files - Return quantity instead of list of files #934
• Client API: tag search autocomplete #958
• Client API: Sort by tag namespace #1062

Pages

• Client API: page and query management #350
• API: Change page contents #570
  • adding files to pages has been implemented
• Client API: endpoint to refresh a page #944

Tags

• Expose favourite tags via API #311
• Client API: tags with use counts per service #359
• Client API: read/write tag presentation details #360
• Client API: Apply siblings on retrieved tags #389
• Additional Option for the API Settings to not Allow Overwriting Previosly Deleted Tags #660
• Client API: Query Tag Parent/Child Relationships #921
• Client API: add/edit/remove parents/siblings #1077

URLs

• Feature:API:Search URLs by prefix #240
• Client API: Ability to lookup an array of URLs in get_url_info and get_url_files #655
• Client API: Associate Additional URLs with add_url Endpoint #1059

Other

• Client API: get information about services #342
• Client API: subscriptions #344
• Client API: ratings #343
• Client API: alternates/duplicates #347
• Generate QR codes for Apps #237
• Client API: manage headers (like cookies) #349
• Add DB Lock feature to the Client side #333
• Popup notification for when things are added through API #559
• Cache for API requests #605
• Support for HTTP 206 Partial Content for audio / video seeking on the client api #647
• RfE: add a root-certificate to the hydrus api https process w/ user input fields for ip and dns names #675
• Notifications API #743
• Client API request proxy #899
• Client API: Read Main Gui Title #916
• Client API: Allow browsers to cache CORS preflight requests #935
• Manage shortcuts/keybinds through API #1012

Review the unchecked Client API requests listed in this issue and follow their linked issues for implementation scope. This is a tracking summary rather than a self-contained implementation task; done means updating its checklist as requests are completed.