uploads: allow searching uploads and media assets by metatag.

Allow searching the /uploads and /media_assets pages by the following metatags:

* id:
* md5:
* width:
* height:
* duration:
* mpixels:
* ratio:
* filesize:
* filetype:
* date:
* age:
* status:<processing|active|deleted|expunged|failed> (for /media_assets)
* status:<pending|processing|active|failed> (for /uploads)
* is:<filetype>, is:<status>
* exif:

Examples:

* https://betabooru.donmai.us/media_assets?search[ai_tags_match]=filetype:png
* https://betabooru.donmai.us/uploads?search[ai_tags_match]=filetype:png

Note that in /uploads search, the id:, date:, and age: metatags refer to the upload media asset, not
the upload itself.

Note also that uploads may contain multiple assets, so for example searching uploads by
`filetype:png` will return all uploads containing at least one PNG file, even if they contain other
non-PNG files.

app/models/media_asset.rb

@@ -204,7 +204,30 @@ class MediaAsset < ApplicationRecord
   concerning :SearchMethods do
     class_methods do
       def ai_tags_match(tag_string, score_range: (50..))
-        AITagQuery.search(tag_string, relation: self, score_range: score_range)
+        MediaAssetQuery.search(tag_string, relation: self, score_range: score_range)
+      end
+
+      def is_matches(value)
+        case value.downcase
+        when *MediaAsset.statuses.keys
+          where(status: value)
+        when *FILE_TYPES
+          attribute_matches(value, :file_ext, :enum)
+        else
+          none
+        end
+      end
+
+      def exif_matches(string)
+        # string = File:ColorComponents=3
+        if string.include?("=")
+          key, value = string.split(/=/, 2)
+          hash = { key => value }
+          joins(:media_metadata).where_json_contains("media_metadata.metadata", hash)
+        # string = File:ColorComponents
+        else
+          joins(:media_metadata).where_json_has_key("media_metadata.metadata", string)
+        end
       end
 
       def search(params, current_user)

app/models/post.rb

@@ -1284,17 +1284,7 @@ class Post < ApplicationRecord
       end
 
       def exif_matches(string)
-        # string = exif:File:ColorComponents=3
-        if string.include?("=")
-          key, value = string.split(/=/, 2)
-          hash = { key => value }
-          metadata = MediaMetadata.joins(:media_asset).where_json_contains(:metadata, hash)
-        # string = exif:File:ColorComponents
-        else
-          metadata = MediaMetadata.joins(:media_asset).where_json_has_key(:metadata, string)
-        end
-
-        where(md5: metadata.select(:md5))
+        where(md5: MediaAsset.exif_matches(string).select(:md5))
       end
 
       def ai_tags_include(value, default_confidence: ">=50")

app/models/upload.rb

@@ -126,7 +126,7 @@ class Upload < ApplicationRecord
   end
 
   def self.ai_tags_match(tag_string, score_range: (50..))
-    upload_media_assets = AITagQuery.search(tag_string, relation: UploadMediaAsset.all, foreign_key: :media_asset_id, score_range: score_range)
+    upload_media_assets = MediaAssetQuery.search(tag_string, relation: UploadMediaAsset.joins(:media_asset), foreign_key: :media_asset_id, score_range: score_range)
     where(upload_media_assets.where("upload_media_assets.upload_id = uploads.id").arel.exists)
   end
 

app/models/upload_media_asset.rb

@@ -41,6 +41,21 @@ class UploadMediaAsset < ApplicationRecord
     expired.update_all(status: :failed, error: "Stuck processing for more than 4 hours")
   end
 
+  def self.is_matches(value)
+    case value.downcase
+    when *UploadMediaAsset.statuses.keys
+      where(status: value)
+    when *MediaAsset::FILE_TYPES
+      attribute_matches(value, :file_ext, :enum)
+    else
+      none
+    end
+  end
+
+  def self.exif_matches(string)
+    merge(MediaAsset.exif_matches(string))
+  end
+
   def self.search(params, current_user)
     q = search_attributes(params, [:id, :created_at, :updated_at, :status, :source_url, :page_url, :error, :upload, :media_asset, :post], current_user: current_user)