Add macro to reuse frontend translation strings

source/macros.py

@@ -0,0 +1,51 @@
+import requests
+import os
+from pathlib import Path    
+import json
+
+TRANSLATIONSFILES = ".cache/translations/"
+
+def flatten_json(json_obj, parent_key='', sep='.'):
+    items = {}
+    for k, v in json_obj.items():
+        new_key = f"{parent_key}{sep}{k}" if parent_key else k
+        if isinstance(v, dict):
+            items.update(flatten_json(v, new_key, sep=sep))
+        else:
+            items[new_key] = v
+    return items
+
+def init_translations():
+    if not os.path.exists(TRANSLATIONSFILES):
+        os.makedirs(TRANSLATIONSFILES)
+    
+    if not os.path.exists(f"{TRANSLATIONSFILES}/hacs.json"):
+        with open(f"{TRANSLATIONSFILES}/hacs.json", "w") as file:
+            translations = requests.get("https://raw.githubusercontent.com/hacs/frontend/main/src/localize/languages/en.json").json()
+            json.dump(flatten_json(translations), file)
+            
+    if not os.path.exists(f"{TRANSLATIONSFILES}/core.json"):
+        with open(f"{TRANSLATIONSFILES}/core.json", "w") as file:
+            translations = requests.get("https://raw.githubusercontent.com/home-assistant/frontend/dev/src/translations/en.json").json()
+            json.dump(flatten_json(translations), file)
+
+
+def define_env(env):
+    init_translations()
+    translations = {
+        "hacs": json.loads(Path(f"{TRANSLATIONSFILES}/hacs.json").read_text()),
+        "core": json.loads(Path(f"{TRANSLATIONSFILES}/core.json").read_text())
+    }
+    
+    @env.macro
+    def hacsui(text: str, placeholders: dict = {}):
+        if (translated := translations["hacs"].get(text)) is None:
+            raise ValueError(f"Translation for '{text}' not found")
+        return translated.format(**placeholders)
+    
+    @env.macro
+    def coreui(text: str, placeholders: dict = {}):
+        if (translated := translations["core"].get(text)) is None:
+            raise ValueError(f"Translation for '{text}' not found")
+        return translated.format(**placeholders)
+