Add mbcheck.

lib/mbtiles.js

@@ -34,6 +34,17 @@ MBTiles.prototype.exists = function(table, callback) {
     }
 };
 
+// DB integrity check.
+MBTiles.prototype.integrity = function(callback) {
+    this.db.get('PRAGMA quick_check(1)', function(err, row) {
+        if (!(row && row.integrity_check && row.integrity_check === 'ok')) {
+            callback(new Error('Corrupted database.'));
+        } else {
+            callback(null, true);
+        }
+    });
+};
+
 // Setup schema, indices, views for a new mbtiles database.
 // Sets the synchronous flag to OFF for (much) faster inserts.
 // See http://www.sqlite3.org/pragma.html#pragma_synchronous

lib/utils.js

@@ -0,0 +1,21 @@
+var utils = {};
+
+utils.table = function(fields) {
+    if (!fields[0]) return;
+    var lengths = fields[0].map(function(val, i) {
+        return Math.max.apply(Math, fields.map(function(field) {
+            if (field[i] === undefined) field[i] = '';
+            return field[i].toString().length;
+        }));
+    });
+    fields.forEach(function(field) {
+        console.warn(
+            '  ' + field.map(function(val, i) {
+                if (i >= lengths.length - 1) return val;
+                return val + Array(lengths[i] - val.toString().length + 1).join(' ');
+            }).join('  ')
+        );
+    });
+};
+
+module.exports = utils;