Deduplicate extra network preview-search code

extensions-builtin/Lora/ui_extra_networks_lora.py

@@ -15,18 +15,10 @@ class ExtraNetworksPageLora(ui_extra_networks.ExtraNetworksPage):
     def list_items(self):
         for name, lora_on_disk in lora.available_loras.items():
             path, ext = os.path.splitext(lora_on_disk.filename)
-            previews = [path + ".png", path + ".preview.png"]
-
-            preview = None
-            for file in previews:
-                if os.path.isfile(file):
-                    preview = self.link_preview(file)
-                    break
-
             yield {
                 "name": name,
                 "filename": path,
-                "preview": preview,
+                "preview": self._find_preview(path),
                 "search_term": self.search_terms_from_path(lora_on_disk.filename),
                 "prompt": json.dumps(f"<lora:{name}:") + " + opts.extra_networks_default_multiplier + " + json.dumps(">"),
                 "local_preview": path + ".png",

modules/ui_extra_networks.py

@@ -2,6 +2,7 @@ import glob
 import os.path
 import urllib.parse
 from pathlib import Path
+from typing import Optional
 
 from modules import shared
 import gradio as gr
@@ -137,6 +138,15 @@ class ExtraNetworksPage:
 
         return self.card_page.format(**args)
 
+    def _find_preview(self, path: str) -> Optional[str]:
+        """
+        Find a preview PNG for a given path (without extension) and call link_preview on it.
+        """
+        for file in [path + ".png", path + ".preview.png"]:
+            if os.path.isfile(file):
+                return self.link_preview(file)
+        return None
+
 
 def intialize():
     extra_pages.clear()

modules/ui_extra_networks_checkpoints.py

 import html
 import json
 import os
-import urllib.parse
 
 from modules import shared, ui_extra_networks, sd_models
 
@@ -17,18 +16,10 @@ class ExtraNetworksPageCheckpoints(ui_extra_networks.ExtraNetworksPage):
         checkpoint: sd_models.CheckpointInfo
         for name, checkpoint in sd_models.checkpoints_list.items():
             path, ext = os.path.splitext(checkpoint.filename)
-            previews = [path + ".png", path + ".preview.png"]
-
-            preview = None
-            for file in previews:
-                if os.path.isfile(file):
-                    preview = self.link_preview(file)
-                    break
-
             yield {
                 "name": checkpoint.name_for_extra,
                 "filename": path,
-                "preview": preview,
+                "preview": self._find_preview(path),
                 "search_term": self.search_terms_from_path(checkpoint.filename) + " " + (checkpoint.sha256 or ""),
                 "onclick": '"' + html.escape(f"""return selectCheckpoint({json.dumps(name)})""") + '"',
                 "local_preview": path + ".png",

modules/ui_extra_networks_hypernets.py

@@ -14,18 +14,11 @@ class ExtraNetworksPageHypernetworks(ui_extra_networks.ExtraNetworksPage):
     def list_items(self):
         for name, path in shared.hypernetworks.items():
             path, ext = os.path.splitext(path)
-            previews = [path + ".png", path + ".preview.png"]
-
-            preview = None
-            for file in previews:
-                if os.path.isfile(file):
-                    preview = self.link_preview(file)
-                    break
 
             yield {
                 "name": name,
                 "filename": path,
-                "preview": preview,
+                "preview": self._find_preview(path),
                 "search_term": self.search_terms_from_path(path),
                 "prompt": json.dumps(f"<hypernet:{name}:") + " + opts.extra_networks_default_multiplier + " + json.dumps(">"),
                 "local_preview": path + ".png",

modules/ui_extra_networks_textual_inversion.py

@@ -15,16 +15,10 @@ class ExtraNetworksPageTextualInversion(ui_extra_networks.ExtraNetworksPage):
     def list_items(self):
         for embedding in sd_hijack.model_hijack.embedding_db.word_embeddings.values():
             path, ext = os.path.splitext(embedding.filename)
-            preview_file = path + ".preview.png"
-
-            preview = None
-            if os.path.isfile(preview_file):
-                preview = self.link_preview(preview_file)
-
             yield {
                 "name": embedding.name,
                 "filename": embedding.filename,
-                "preview": preview,
+                "preview": self._find_preview(path),
                 "search_term": self.search_terms_from_path(embedding.filename),
                 "prompt": json.dumps(embedding.name),
                 "local_preview": path + ".preview.png",