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Node / ReticulumProjects / MeshChatX.git / commits / 6e8ab5a


Commit 6e8ab5a5eb733b37fd275ae122e3f705af60e690

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Parents : e3687e3
Author : Ivan <ivan@quad4.io>
Signature : Signature validation error
Date : 2026-04-23T02:31:00-05:00

feat(map-manager): add tile export limit and unique tile counting for MBTiles exports

Changes

1 files changed, 23 insertions(+), 4 deletions(-)

M meshchatx/src/backend/map_manager.py +23 -4

Diff

diff --git a/meshchatx/src/backend/map_manager.py b/meshchatx/src/backend/map_manager.py
index 65dfd813..bae912e3 100644
--- a/meshchatx/src/backend/map_manager.py
+++ b/meshchatx/src/backend/map_manager.py
@@ -16,6 +16,9 @@ TRANSPARENT_TILE = base64.b64decode(
"iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAADUlEQVR42mNkYAAAAAYAAjCB0C8AAAAASUVORK5CYII=",
)
+# Guardrail for MBTiles exports (world + high zoom can explode).
+MAX_EXPORT_TILES = 200_000
+
class MapManager:
def __init__(self, config_manager, storage_dir):
@@ -153,6 +156,18 @@ class MapManager:
RNS.log(f"Error reading MBTiles tile {z}/{x}/{y}: {e}", RNS.LOG_ERROR)
return None
+ def count_export_tiles(self, bbox, min_zoom, max_zoom):
+ """Return the number of unique raster tiles that would be exported."""
+ min_lon, min_lat, max_lon, max_lat = bbox
+ seen = set()
+ for z in range(min_zoom, max_zoom + 1):
+ x1, y1 = self._lonlat_to_tile(min_lon, max_lat, z)
+ x2, y2 = self._lonlat_to_tile(max_lon, min_lat, z)
+ for x in range(x1, x2 + 1):
+ for y in range(y1, y2 + 1):
+ seen.add((z, x, y))
+ return len(seen)
+
def start_export(self, export_id, bbox, min_zoom, max_zoom, name="Exported Map"):
"""Start downloading tiles and creating an MBTiles file in a background thread."""
thread = threading.Thread(
@@ -192,15 +207,19 @@ class MapManager:
# bbox: [min_lon, min_lat, max_lon, max_lat]
min_lon, min_lat, max_lon, max_lat = bbox
- # collect all tiles to download
+ # collect all tiles to download (unique keys; bbox can span tile seams)
tiles_to_download = []
+ seen = set()
zoom_levels = range(min_zoom, max_zoom + 1)
for z in zoom_levels:
x1, y1 = self._lonlat_to_tile(min_lon, max_lat, z)
x2, y2 = self._lonlat_to_tile(max_lon, min_lat, z)
- tiles_to_download.extend(
- (z, x, y) for x in range(x1, x2 + 1) for y in range(y1, y2 + 1)
- )
+ for x in range(x1, x2 + 1):
+ for y in range(y1, y2 + 1):
+ key = (z, x, y)
+ if key not in seen:
+ seen.add(key)
+ tiles_to_download.append(key)
total_tiles = len(tiles_to_download)
self._export_progress[export_id]["total"] = total_tiles


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