Mercurial > browser-couch

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/browser-couch.js	Thu Apr 09 16:17:58 2009 -0700
@@ -0,0 +1,96 @@
+var BrowserCouch = {
+  get: function BC_get(name, cb) {
+    cb(new this._DB(name, new Object()));
+  },
+
+  _DB: function BC__DB(name, documents) {
+    this.get = function DB_get(id, cb) {
+      if (documents[id])
+        cb(documents[id]);
+      else
+        cb(null);
+    };
+
+    this.put = function DB_put(document, cb) {
+      if (document.constructor.name == "Array") {
+        for (var i = 0; i < document.length; i++)
+          documents[document[i].id] = document[i];
+      } else
+        documents[document.id] = document;
+      cb();
+    };
+
+    this.view = function DB_view(options) {
+      var map = options.map;
+      var reduce = options.reduce;
+
+      if (!map)
+        throw new Error('map function not provided');
+
+      var mapResult = {};
+
+      function emit(key, value) {
+        // TODO: This assumes that the key will always be
+        // an indexable value. We may have to hash the value,
+        // though, if it's e.g. an Object.
+        if (!mapResult[key])
+          mapResult[key] = [];
+        mapResult[key].push(value);
+      }
+
+      for (id in documents) {
+        var document = documents[id];
+        map(document, emit);
+      }
+
+      if (reduce) {
+        var keys = [];
+        var values = [];
+
+        for (key in mapResult) {
+          keys.push(key);
+          values.push(mapResult[key]);
+        }
+
+        options.callback(reduce(keys, values));
+      } else {
+        var result = [];
+
+        for (key in mapResult) {
+          var values = mapResult[key];
+          for (var i = 0; i < values.length; i++)
+            result.push([key, values[i]]);
+        }
+        options.callback(result);
+      }
+    };
+  }
+};
+
+var gCouch = BrowserCouch.get(
+  "blarg",
+  function(db) {
+    console.log(db);
+    db.put(
+      [{id: "monkey",
+        content: "hello there dude"},
+       {id: "chunky",
+        content: "hello there dogen"}],
+      function() {
+        db.view(
+          {map: function(doc, emit) {
+             var words = doc.content.split(" ");
+             for (var i = 0; i < words.length; i++)
+               emit(words[i], 1);
+           },
+           reduce: function(keys, values) {
+             var totals = {};
+             for (var i = 0; i < keys.length; i++)
+               totals[keys[i]] = values[i].length;
+             return totals;
+           },
+           callback: function(result) {
+             console.log(result);
+           }});
+      });
+  });
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/index.html	Thu Apr 09 16:17:58 2009 -0700
@@ -0,0 +1,12 @@
+<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
+          "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
+<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en" lang="en">
+<head>
+  <meta http-equiv="Content-type" content="text/html; charset=utf-8" />
+  <title>Browser Couch!</title>
+</head>
+<body>
+Blah.
+</body>
+<script src="browser-couch.js"></script>
+</html>