Reuse memoir JSON payload parsing

api/services/memoir_images/json_payload.py

@@ -0,0 +1,23 @@
+import re
+
+_MARKDOWN_JSON_FENCE_RE = re.compile(
+    r"^\s*```(?:json)?\s*(.*?)\s*```\s*$",
+    re.IGNORECASE | re.DOTALL,
+)
+
+
+def extract_json_payload(raw_response: str | None) -> str:
+    cleaned = (raw_response or "").strip()
+    fenced_match = _MARKDOWN_JSON_FENCE_RE.match(cleaned)
+    if fenced_match:
+        cleaned = fenced_match.group(1).strip()
+
+    if cleaned.startswith("{") and cleaned.endswith("}"):
+        return cleaned
+
+    start = cleaned.find("{")
+    end = cleaned.rfind("}")
+    if start != -1 and end != -1 and end > start:
+        return cleaned[start : end + 1].strip()
+
+    return cleaned