Image Command Priorities
OcelotBOT's image commands, such as !bulge or !rainbow all follow the same logic for determining which image will be used for a command.
Low Level Order
1. Does the replied message (if any) start with a URL
If the message starts with a URL, it will always be used even if it is not an image URL. Only raw image URLs or gfycat or tenor GIFs are valid.
2. Does the replied message (if any) have an attachment
If there are multiple attachments, the first image attachment is used.
a. For multi-image commands (tile, overlay)
3a. Is the nth* argument in the command a user mention
If it's a user mention, the mentioned user's avatar is used
4a. Is the nth* argument a tenor GIF
Tenor URLs will be parsed into GIF URLs
5a. Is the nth* argument a gfycat GIF
Gfycat URLs are are also parsed
6a. Is the nth* argument an emoji
Emojis will be extracted and used
b. For all other image commands
3b. Does the second argument contain a URL
Again, any URL even invalid or non-image URLs will be counted
4b. Does the first argument contain a URL
5b. Does the first argument contain an emoji
6b. Does the second argument contain an emoji
7. Do any of the previous x** messages contain start with a URL
Even an invalid or non-image URL will be counted here
8. Do any of the previous x** messages contain attachments
As before, the first image attachment is used
9. Do any of the previous x** messages contain embeds
If a message contains multiple embeds, only the first is used. Only the embed's image will be used, not the author or thumbnail fields, or any URLs in the embed.
*for overlay the back image is n = 1 and the front image is n = 2, for the tile it is left = 1 and right = 2
**Similarly, the first valid image is skipped for the second arguments for tile and overlay
A message containing an emoji and then a URL will pick the emoji over the URL, except for tile/overlay commands.
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A previous message with an emoji will not work
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