Add documentation for the emoji endpoints

docs/api/pleroma_api.md

@@ -365,3 +365,69 @@ The status posting endpoint takes an additional parameter, `in_reply_to_conversa
 * Params:
     * `recipients`: A list of ids of users that should receive posts to this conversation. This will replace the current list of recipients, so submit the full list. The owner of owner of the conversation will always be part of the set of recipients, though.
 * Response: JSON, statuses (200 - healthy, 503 unhealthy)
+
+
+## `POST /api/pleroma/emoji/reload`
+### Reload the instance's custom emoji
+* Method `POST`
+* Authentication: required
+* Params: None
+* Response: JSON, "ok" and 200 status
+
+## `PUT /api/pleroma/emoji/packs/:name`
+### Creates an empty custom emoji pack
+* Method `PUT`
+* Authentication: required
+* Params: None
+* Response: JSON, "ok" and 200 status or 409 if the pack with that name already exists
+
+## `DELETE /api/pleroma/emoji/packs/:name`
+### Delete a custom emoji pack
+* Method `DELETE`
+* Authentication: required
+* Params: None
+* Response: JSON, "ok" and 200 status or 500 if there was an error deleting the pack
+
+## `POST /api/pleroma/emoji/packs/:name/update_file`
+### Update a file in a custom emoji pack
+* Method `POST`
+* Authentication: required
+* Params: 
+    * if the `action` is `add`, adds an emoji named `shortcode` to the pack `pack_name`,
+      that means that the emoji file needs to be uploaded with the request
+      (thus requiring it to be a multipart request) and be named `file`.
+      There can also be an optional `filename` that will be the new emoji file name
+      (if it's not there, the name will be taken from the uploaded file).
+    * if the `action` is `update`, changes emoji shortcode
+      (from `shortcode` to `new_shortcode` or moves the file (from the current filename to `new_filename`)
+    * if the `action` is `remove`, removes the emoji named `shortcode` and it's associated file
+* Response: JSON, updated "files" section of the pack and 200 status, 409 if the trying to use a shortcode
+  that is already taken, 400 if there was an error with the shortcode, filename or file (additional info
+  in the "error" part of the response JSON)
+
+## `POST /api/pleroma/emoji/packs/:name/update_metadata`
+### Updates (replaces) pack metadata
+* Method `POST`
+* Authentication: required
+* Params: 
+  * `new_data`: new metadata to replace the old one
+* Response: JSON, updated "metadata" section of the pack and 200 status or 400 if there was a
+  problem with the new metadata (the error is specified in the "error" part of the response JSON)
+
+## `POST /api/pleroma/emoji/packs/download_from`
+### Requests the instance to download the pack from another instance
+* Method `POST`
+* Authentication: required
+* Params: 
+  * `instance_address`: the address of the instance to download from
+  * `pack_name`: the pack to download from that instance
+* Response: JSON, "ok" and 200 status if the pack was downloaded, or 500 if there were
+  errors downloading the pack
+
+## `GET /api/pleroma/emoji/packs/:name/download_shared`
+### Requests the instance to download the pack from another instance
+* Method `GET`
+* Authentication: not requires
+* Params: None
+* Response: the archive of the pack with a 200 status code, 403 if the pack is not set as shared,
+  404 if the pack does not exist