Improve media library

[markmacgillivray]

• Make things POSTED to the media library get inserted in an index?

  @emanuil-tolev : This seems to be the best way to do the ones below e.g. metadata, so yes, do this.

• Store metadata about them

• Store where they have been used, instead of searching for the name string as currently happens, which leads to errors.

  @emanuil-tolev : need to clarify this requirement. How else do you check if an image has been used except for the name string? Maybe in a tag? But then using it in Javascript won't be tracked. What errors have occurred before? Using the name with the extension (example.png) should not break anything

• Fix so that the DELETE function works (nginx issue)

[emanuil-tolev]

@richard-jones :

• upload with conventional "Browse" button in addition to drag and drop
• upload by url
• access to these functions directly when editing a page from the /edit template
• generate tags with alt and title attributes == metadata from the image (do not try to insert into etherpad) so that people don't have to write image tags by hand any more
• be able to search images (if metadata, description and tags are added to the images - see first comment in this thread by Mark)
• low importance modularise components so they can be used in other projects, e.g.:
  • image upload via conventional box
  • image upload via drag & drop
  • image upload via URL
  • creation of elasticsearch records with metadata for images
  • image search
  • generation of tags
  • polling a directory for new images (if the note by @markmacgillivray is ever implemented, see comment below)

[emanuil-tolev]

@markmacgillivray does not have any requirements wrt the media library. However, noted that originally the idea was to let less tech-savvy people build their websites using this, as it could simply read in files from a folder, and that could be synced to a dropbox account or similar. We don't have a clear use case for this, so this will not be done now until such a use case appears.

• add ability to poll a directory for images and create relevant elasticsearch records with empty metadata (or read the EXIF) (relevant only after adding metadata to images and all of them having elasticsearch records)

[martyn-w]

• In the media library index, rather than display a list of filenames, a small thumbnail of the image/pdf/word file etc would be more useful

[emanuil-tolev]

@emanuil-tolev would like:

• resize previews to user's screen - 100 pixels if bigger. Scale with the W/H ratio of course.
• show previews in centre of user's screen - right now previews will display down and right of the mouse cursor, so hovering over a link anywhere in the lower half of the screen makes a large part of the preview invisible (visually cropped)