guild: add implementations for emoji add/update/remove

All icons will be invalidated.

 - images: change icon path model
 - images: handle hashes being NULL, for emojis only needing
    the key
 - schemas: add NEW_EMOJI, PATCH_EMOJI
 - migration.scripts: add 3_drop_constraints_icons_hash
 - schema.sql: drop unique and not null from hash, change primary key in
    icons

litecord/blueprints/guild/emoji.py

@@ -1,11 +1,21 @@
-from quart import Blueprint, jsonify, current_app as app
+from quart import Blueprint, jsonify, current_app as app, request
 
 from litecord.auth import token_check
-from litecord.blueprints.checks import guild_check
+from litecord.blueprints.checks import guild_check, guild_perm_check
+from litecord.schemas import validate, NEW_EMOJI, PATCH_EMOJI
+from litecord.snowflake import get_snowflake
 
 bp = Blueprint('guild.emoji', __name__)
 
 
+async def _dispatch_emojis(guild_id):
+    """Dispatch a Guild Emojis Update payload to a guild."""
+    await app.dispatcher.dispatch('guild', guild_id, 'GUILD_EMOJIS_UPDATE', {
+        'guild_id': str(guild_id),
+        'emojis': await app.storage.get_guild_emojis(guild_id)
+    })
+
+
 @bp.route('/<int:guild_id>/emojis', methods=['GET'])
 async def _get_guild_emoji(guild_id):
     user_id = await token_check()
@@ -22,3 +32,75 @@ async def _get_guild_emoji_one(guild_id, emoji_id):
     return jsonify(
         await app.storage.get_emoji(emoji_id)
     )
+
+
+@bp.route('/<int:guild_id>/emojis', methods=['POST'])
+async def _put_emoji(guild_id):
+    user_id = await token_check()
+
+    await guild_check(user_id, guild_id)
+    await guild_perm_check(user_id, guild_id, 'manage_emojis')
+
+    j = validate(await request.get_json(), NEW_EMOJI)
+
+    emoji_id = get_snowflake()
+
+    icon = await app.icons.put('emoji', emoji_id, None, j['image'])
+
+    await app.db.execute(
+        """
+        INSERT INTO guild_emoji
+            (id, guild_id, uploader_id, name, image, animated)
+        VALUES
+            ($1, $2, $3, $4, $5, $6)
+        """,
+        emoji_id, guild_id, user_id,
+        j['name'],
+        icon.icon_hash,
+        icon.mime == 'image/gif')
+
+    await _dispatch_emojis(guild_id)
+
+    return jsonify(
+        await app.storage.get_emoji(emoji_id)
+    )
+
+
+@bp.route('/<int:guild_id>/emojis/<int:emoji_id>', methods=['PATCH'])
+async def _patch_emoji(guild_id, emoji_id):
+    user_id = await token_check()
+
+    await guild_check(user_id, guild_id)
+    await guild_perm_check(user_id, guild_id, 'manage_emojis')
+
+    j = validate(await request.get_json(), PATCH_EMOJI)
+
+    # TODO: check if it actually updated anything
+    await app.db.execute("""
+    UPDATE guild_emoji
+    SET name = $1
+    WHERE id = $2
+    """, j['name'], emoji_id)
+
+    await _dispatch_emojis(guild_id)
+
+    return jsonify(
+        await app.storage.get_emoji(emoji_id)
+    )
+
+
+@bp.route('/<int:guild_id>/emojis/<int:emoji_id>', methods=['DELETE'])
+async def _del_emoji(guild_id, emoji_id):
+    user_id = await token_check()
+
+    await guild_check(user_id, guild_id)
+    await guild_perm_check(user_id, guild_id, 'manage_emojis')
+
+    # TODO: check if actually deleted
+    await app.db.execute("""
+    DELETE FROM guild_emoji
+    WHERE id = $2
+    """, emoji_id)
+
+    await _dispatch_emojis(guild_id)
+    return '', 204

litecord/images.py

@@ -26,6 +26,7 @@ def _get_mime(ext: str):
 @dataclass
 class Icon:
     """Main icon class"""
+    key: str
     icon_hash: str
     mime: str
 
@@ -33,7 +34,7 @@ class Icon:
     def as_path(self) -> str:
         """Return a filesystem path for the given icon."""
         ext = _get_ext(self.mime)
-        return str(IMAGE_FOLDER / f'{self.icon_hash}.{ext}')
+        return str(IMAGE_FOLDER / f'{self.key}_{self.icon_hash}.{ext}')
 
     @property
     def as_pathlib(self) -> str:
@@ -147,40 +148,42 @@ class IconManager:
         target_mime = _get_mime(target)
         log.info('converting from {} to {}', icon.mime, target_mime)
 
-        target_path = IMAGE_FOLDER / f'{icon.icon_hash}.{target}'
+        target_path = IMAGE_FOLDER / f'{icon.key}_{icon.icon_hash}.{target}'
 
         if target_path.exists():
-            return Icon(icon.icon_hash, target_mime)
+            return Icon(icon.key, icon.icon_hash, target_mime)
 
         image = Image.open(icon.as_path)
         target_fd = target_path.open('wb')
         image.save(target_fd, format=target)
         target_fd.close()
 
-        return Icon(icon.icon_hash, target_mime)
+        return Icon(icon.key, icon.icon_hash, target_mime)
 
     async def generic_get(self, scope, key, icon_hash, **kwargs) -> Icon:
         """Get any icon."""
         log.debug('GET {} {} {}', scope, key, icon_hash)
         key = str(key)
 
-        icon_row = await self.storage.db.fetchrow("""
-        SELECT hash, mime
+        hash_query = 'AND hash = $3' if key else ''
+
+        icon_row = await self.storage.db.fetchrow(f"""
+        SELECT key, hash, mime
         FROM icons
         WHERE scope = $1
           AND key = $2
-          AND hash = $3
+          {hash_query}
         """, scope, key, icon_hash)
 
         if not icon_row:
             return None
 
-        icon = Icon(icon_row['hash'], icon_row['mime'])
+        icon = Icon(icon_row['key'], icon_row['hash'], icon_row['mime'])
 
         if not icon.as_pathlib.exists():
             await self.delete(icon)
             return None
-        
+
         if 'ext' in kwargs and kwargs['ext'] != icon.extension:
             return await self._convert_ext(icon, kwargs['ext'])
 
@@ -195,7 +198,7 @@ class IconManager:
                   b64_data: str, **kwargs) -> Icon:
         """Insert an icon."""
         if b64_data is None:
-            return Icon(None, '')
+            return Icon(None, None, '')
 
         mime, raw_data = parse_data_uri(b64_data)
         data_fd = BytesIO(raw_data)
@@ -223,7 +226,10 @@ class IconManager:
             data_fd.seek(0)
 
         # calculate sha256
-        icon_hash = await calculate_hash(data_fd)
+        # ignore icon hashes if we're talking about emoji
+        icon_hash = (await calculate_hash(data_fd)
+                     if scope != 'emoji'
+                     else None)
 
         await self.storage.db.execute("""
         INSERT INTO icons (scope, key, hash, mime)
@@ -231,14 +237,14 @@ class IconManager:
         """, scope, str(key), icon_hash, mime)
 
         # write it off to fs
-        icon_path = IMAGE_FOLDER / f'{icon_hash}.{extension}'
+        icon_path = IMAGE_FOLDER / f'{key}_{icon_hash}.{extension}'
         icon_path.write_bytes(raw_data)
 
         # copy from data_fd to icon_fd
         # with icon_path.open(mode='wb') as icon_fd:
         #    icon_fd.write(data_fd.read())
 
-        return Icon(icon_hash, mime)
+        return Icon(str(key), icon_hash, mime)
 
     async def delete(self, icon: Icon):
         """Delete an icon from the database and filesystem."""
@@ -274,7 +280,7 @@ class IconManager:
         WHERE hash = $1
         """, icon.icon_hash)
 
-        paths = IMAGE_FOLDER.glob(f'{icon.icon_hash}.*')
+        paths = IMAGE_FOLDER.glob(f'{icon.key}_{icon.icon_hash}.*')
 
         for path in paths:
             try:

litecord/schemas.py

@@ -566,3 +566,16 @@ GUILD_SETTINGS = {
 GUILD_PRUNE = {
     'days': {'type': 'number', 'coerce': int, 'min': 1}
 }
+
+NEW_EMOJI = {
+    'name': {
+        'type': 'string', 'minlength': 1, 'maxlength': 256, 'required': True},
+    'image': {'type': 'b64_icon', 'required': True},
+    'roles': {'type': 'list', 'schema': {'coerce': int}}
+}
+
+PATCH_EMOJI = {
+    'name': {
+        'type': 'string', 'minlength': 1, 'maxlength': 256, 'required': True},
+    'roles': {'type': 'list', 'schema': {'coerce': int}}
+}

manage/cmd/migration/scripts/3_drop_constraints_icons_hash.sql

@@ -0,0 +1,9 @@
+-- drop main primary key
+-- since hash can now be nullable
+ALTER TABLE icons DROP CONSTRAINT "icons_pkey";
+
+-- remove not null from hash column
+ALTER TABLE icons ALTER COLUMN hash DROP NOT NULL;
+
+-- add new primary key, without hash
+ALTER TABLE icons ADD CONSTRAINT icons_pkey PRIMARY KEY (scope, key);

schema.sql

@@ -49,11 +49,11 @@ CREATE TABLE IF NOT EXISTS icons (
     key text,
 
     -- sha256 of the icon
-    hash text UNIQUE NOT NULL,
+    hash text,
 
     -- icon mime
     mime text NOT NULL,
-    PRIMARY KEY (scope, hash, mime)
+    PRIMARY KEY (scope, key)
 );