fix

lib/mbtiles.js

@@ -77,6 +77,7 @@ function MBTiles(uri, callback) {
     var mbtiles = this;
     this.setMaxListeners(0);
     this.filename = uri.pathname;
+    this.mode = mode;
     this._batchSize = +uri.query.batch;
     mbtiles._db = new sqlite3.Database(mbtiles.filename, mode, function(err) {
         if (err) return callback(err);
@@ -96,6 +97,14 @@ MBTiles.registerProtocols = function(tilelive) {
     tilelive.protocols['mbtiles:'] = MBTiles;
 };
 
+MBTiles.prototype.reInit = function () {
+    this._db = new sqlite3.Database(this.filename, this.mode, (err) => {
+        if (err) {
+            console.log(`Error while initialization ${this.filename}`);
+        }
+    });
+};
+
 // Finds all mbtiles file in the filepath and returns their tilesource URI.
 MBTiles.list = function(filepath, callback) {
     filepath = path.resolve(filepath);
@@ -208,6 +217,52 @@ MBTiles.prototype.getTile = function(z, x, y, callback) {
     });
 };
 
+
+MBTiles.prototype.getTileT = function(t, z, x, y, callback) {
+    if (typeof callback !== 'function') throw new Error('Callback needed');
+    if (!this.open) return callback(new Error('MBTiles not yet loaded'));
+
+    // Flip Y coordinate because MBTiles files are TMS.
+    y = (1 << z) - 1 - y;
+
+    var sql = 'SELECT tile_data FROM tiles WHERE t_coord = ? and zoom_level = ? AND tile_column = ? AND tile_row = ?';
+    var mbtiles = this;
+
+    this._db.get(sql, t, z, x, y, function(err, row) {
+        if ((!err && !row) || (err && err.errno == 1)) {
+            return callback(new Error('Tile does not exist'));
+        } else if (err) {
+            return callback(err);
+        } else if (!row.tile_data || !Buffer.isBuffer(row.tile_data)) {
+            var err = new Error('Tile is invalid');
+            err.code = 'EINVALIDTILE';
+            return callback(err);
+        } else {
+            var headers = tiletype.headers(row.tile_data);
+            headers['Last-Modified'] = new Date(mbtiles._stat.mtime).toUTCString();
+            headers['ETag'] = mbtiles._stat.size + '-' + Number(mbtiles._stat.mtime);
+            if (process.env.BRIDGE_LOG_MAX_VTILE_BYTES_COMPRESSED) {
+                var tileDataLength = row.tile_data.length;
+                stats.count++;
+                stats.total = stats.total + (tileDataLength * 0.001);
+                if (stats.max < tileDataLength) {
+                    stats.max = tileDataLength;
+                }
+                var area = stats.hasOwnProperty(z)
+                    ? stats[z] + utils.calculateTileArea(z, x, y)
+                    : utils.calculateTileArea(z, x, y);
+
+                stats = {
+                    ...stats,
+                    [z]: area
+                };
+
+            }
+            return callback(null, row.tile_data, headers);
+        }
+    });
+};
+
 // Select a grid and its data from an mbtiles database. Scheme is XYZ.
 //
 // - @param {Number} z tile z coordinate

package.json

@@ -1,6 +1,6 @@
 {
   "name": "@mapbox/mbtiles",
-  "version": "0.12.2",
+  "version": "0.15.1",
   "description": "Utilities and tilelive integration for the MBTiles format.",
   "url": "http://github.com/mapbox/node-mbtiles",
   "author": "Mapbox (https://www.mapbox.com)",