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✨ "Media is loading" indicator in create post modal #529
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Previously we had to keep track of separate fields for image and video files or PostImage/PostVideo objects, a link url, removers, and boolean flags for whether we had an image or video. Now all this data is kept inside a single class.
WIP since shared media does not use this system yet.
Cancellation can happen if the user presses the 'x' on the media progress indicator or a two shares are received closely together (second one cancels the first).
…lling the active process
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This PR adds a placeholder in the create post modal which indicates that media is being loaded. This appears after the user selects a media file but before the file has been processed (e.g. copied or converted) to indicate to the user that something is happening.
To accomplish this I've added an EventService which functions like an event bus. Different services and widgets can subscribe to events or post events. For example, the MediaService posts events to notify about its progress while OBSavePostModal subscribes to these media events in order to update the media attached to the post.
I implemented the event bus system myself since it was necessary that an event subscriber be able to "consume" the event and thus prevent it from being processed by other subscribers down the line. For example, both the OBHomePage and OBSavePostModal subscribe to share events, but if the modal is open the OBHomePage should not receive any of these events (since they're handled by the post modal).
This is a draft since there are a few bugs to iron out and I want to test a couple of variations on the visuals of the indicator.