Cleaner initialization of hypercore

Author: Matt Zumwalt

index.js

@@ -6,11 +6,25 @@ module.exports = Jawn
 
 function Jawn (opts) {
   if (!opts) opts = {}
-  var db = opts.db || level('data.jawn')
-  this.core = opts.core || hypercore(db)
+  this.core = initializeHypercore(opts)
   this.db = this.core.db
 }
 
 Jawn.prototype.createImportPipeline = function (opts) {
   return createImportPipeline(this, opts)
 }
+
+// Initializes hypercore and its database
+// @default Creates a leveldb database called `data.jawn` and initializes hypercore using that db
+// @option 'core' the hypercore instance to use
+// @option 'db' the db instace (leveldb) to initialize hypercore with. This is ignored if you use the `core` option
+function initializeHypercore (opts) {
+  var core
+  if (opts.hasOwnProperty('core')) {
+    core = opts.core
+  } else {
+    var db = opts.db || level('data.jawn')
+    core = hypercore(db)
+  }
+  return core
+}