Prepare mobile de parser release

iaai_scraper/mobile_de/flight.py

@@ -0,0 +1,79 @@
+from __future__ import annotations
+
+import json
+import re
+from typing import Any
+
+NEXT_FLIGHT_RE = re.compile(r"self\.__next_f\.push\(\[1,\"(.*?)\"\]\)", re.DOTALL)
+
+
+def extract_next_flight_strings(html: str) -> list[str]:
+    """Extract decoded Next.js Flight chunks from mobile.de HTML."""
+    chunks: list[str] = []
+    for match in NEXT_FLIGHT_RE.finditer(html):
+        raw = match.group(1)
+        try:
+            chunks.append(json.loads(f'"{raw}"'))
+        except json.JSONDecodeError:
+            # Fallback keeps parser useful if one chunk has non-standard escaping.
+            chunks.append(raw.encode("utf-8", errors="ignore").decode("unicode_escape", errors="ignore"))
+    return chunks
+
+
+def extract_json_object_after(text: str, marker: str) -> dict[str, Any] | None:
+    """Return JSON object that starts immediately after a marker in a decoded Flight chunk."""
+    marker_index = text.find(marker)
+    if marker_index < 0:
+        return None
+    start = text.find("{", marker_index + len(marker))
+    if start < 0:
+        return None
+
+    depth = 0
+    in_string = False
+    escaped = False
+    for index in range(start, len(text)):
+        char = text[index]
+        if in_string:
+            if escaped:
+                escaped = False
+            elif char == "\\":
+                escaped = True
+            elif char == '"':
+                in_string = False
+            continue
+        if char == '"':
+            in_string = True
+        elif char == "{":
+            depth += 1
+        elif char == "}":
+            depth -= 1
+            if depth == 0:
+                candidate = text[start : index + 1]
+                try:
+                    return json.loads(candidate)
+                except json.JSONDecodeError:
+                    return None
+    return None
+
+
+def extract_search_results(html: str) -> dict[str, Any]:
+    """Extract searchResults from mobile.de SRP HTML."""
+    for chunk in extract_next_flight_strings(html):
+        if '"eventScope":"page-srp"' not in chunk or '"searchResults"' not in chunk:
+            continue
+        results = extract_json_object_after(chunk, '"searchResults":')
+        if isinstance(results, dict):
+            return results
+    return {}
+
+
+def extract_detail_listing(html: str) -> dict[str, Any]:
+    """Extract listing object from mobile.de VIP/detail HTML."""
+    for chunk in extract_next_flight_strings(html):
+        if '"eventScope":"page-vip"' not in chunk or '"listing"' not in chunk:
+            continue
+        listing = extract_json_object_after(chunk, '"listing":')
+        if isinstance(listing, dict):
+            return listing
+    return {}