use new tilesource interface

lib/mbtiles.js

@@ -3,7 +3,6 @@ var _ = require('underscore'),
     Step = require('step'),
     crypto = require('crypto'),
     zlib = require('zlib'),
-    get = require('get'),
     path = require('path'),
     sm = new (require('sphericalmercator')),
     sqlite3 = require('sqlite3');
@@ -13,16 +12,40 @@ var _ = require('underscore'),
 // MBTiles class for doing common operations (schema setup, tile reading,
 // insertion, etc.)
 module.exports = MBTiles;
-function MBTiles(filename, callback) {
-    var mbtiles = this;
-    this.filename = filename;
-    this.db = new sqlite3.Database(filename, function(err) {
+
+// Provides access to an mbtiles database file.
+// - uri: A parsed URL hash, the only relevant part is `pathname`.
+// - callback: Will be called when the resources have been acquired
+//       or acquisition failed.
+function MBTiles(uri, callback) {
+    this.filename = uri.pathname;
+    this.db = new sqlite3.cached.Database(uri.pathname, function(err) {
         if (err) return callback(err);
-        mbtiles.metadata('online', function(err, value) {
-            // Ignore not-existant key.
-            mbtiles.online = value;
-            if (callback) callback(null);
-        });
+        else callback(null, this);
+    }.bind(this));
+};
+
+// Finds all mbtiles file in the filepath and returns their tilesource URI.
+MBTiles.list = function(filepath, callback) {
+    filepath = path.resolve(filepath);
+    fs.readdir(filepath, function(err, files) {
+        if (err) return callback(err);
+        for (var result = {}, i = 0; i < files.length; i++) {
+            var name = files[i].match(/^([\w-]+)\.mbtiles$/);
+            if (name) result[name[1]] = 'mbtiles://' + path.join(filepath, name[0]);
+        }
+        callback(null, result);
+    });
+};
+
+// Finds an mbtiles file with the given ID in the filepath and returns a
+// tilesource URI.
+MBTiles.findID = function(filepath, id, callback) {
+    filepath = path.resolve(filepath);
+    var file = path.join(filepath, id + '.mbtiles');
+    fs.stat(file, function(err, stats) {
+        if (err) callback(err);
+        else callback(null, 'mbtiles://' + file);
     });
 };
 
@@ -219,47 +242,25 @@ MBTiles.prototype.insertGridTiles = function(map, callback) {
 // - @param {Number} y tile y coordinate.
 // - @param {Number} z tile z coordinate.
 // - @param {Function} callback
-MBTiles.prototype.tile = function(x, y, z, callback) {
+MBTiles.prototype.getTile = function(x, y, z, callback) {
     var mbtiles = this;
     this.db.get('SELECT tile_data FROM tiles WHERE ' +
         'zoom_level = ? AND tile_column = ? AND tile_row = ?',
         z, x, y,
         function(err, row) {
             if (err) callback(err);
-            else if (!row || !row.tile_data) mbtiles.onlineTile(x, y, z, callback);
+            else if (!row || !row.tile_data) callback(new Error('Tile does not exist'));
             else callback(null, row.tile_data);
         });
 };
 
-// Requests a tile from an online source and cache it to the database.
-//
-// - @param {Number} x tile x coordinate.
-// - @param {Number} y tile y coordinate.
-// - @param {Number} z tile z coordinate.
-// - @param {Function} callback
-MBTiles.prototype.onlineTile = function(x, y, z, callback) {
-    var mbtiles = this;
-    if (!this.online) {
-        return callback(new Error('Tile does not exist'));
-    }
-
-    var url = this.online.replace(/%x/g, x).replace(/%y/g, Math.pow(2, z) - 1 - y).replace(/%z/g, z);
-    new get(url).asBuffer(function(err, result) {
-        if (err) return callback(new Error(err));
-
-        // Cache image.
-        mbtiles.insertTiles([{ x: x, y: y, z: z, data: result }], function() {});
-        callback(null, result);
-    });
-};
-
 // Select a grid and its data from an mbtiles database.
 //
 // - @param {Number} x tile x coordinate
 // - @param {Number} y tile y coordinate
 // - @param {Number} z tile z coordinate
 // - @param {Function} callback
-MBTiles.prototype.grid = function(x, y, z, callback) {
+MBTiles.prototype.getGrid = function(x, y, z, callback) {
     var that = this;
     Step(
         function() {
@@ -312,7 +313,7 @@ MBTiles.prototype.metadata = function(key, callback) {
 // Extend `MBTiles` class with an `info` method for retrieving metadata and
 // performing fallback queries if certain keys (like `bounds`, `minzoom`,
 // `maxzoom`) have not been provided.
-MBTiles.prototype.info = function(callback) {
+MBTiles.prototype.getInfo = function(callback) {
     var that = this;
     var info = {};
     info.basename = path.basename(that.filename);
@@ -394,9 +395,9 @@ MBTiles.prototype.info = function(callback) {
     // Return info
     function(err) {
         if (err) return callback(err);
-        var range = parseInt(info.maxzoom) - parseInt(info.minzoom);
-        info.minzoom = parseInt(info.minzoom);
-        info.maxzoom = parseInt(info.maxzoom);
+        var range = parseInt(info.maxzoom, 10) - parseInt(info.minzoom, 10);
+        info.minzoom = parseInt(info.minzoom, 10);
+        info.maxzoom = parseInt(info.maxzoom, 10);
         info.bounds = _(info.bounds.split(',')).map(parseFloat);
         info.center = [
             (info.bounds[2] - info.bounds[0]) / 2 + info.bounds[0],