1 files changed, 112 insertions, 0 deletions
diff --git a/couchjs/js/util.js b/couchjs/js/util.js
new file mode 100644
index 00000000..9cc464c3
--- /dev/null
+++ b/couchjs/js/util.js
@@ -0,0 +1,112 @@
+// Licensed under the Apache License, Version 2.0 (the "License"); you may not
+// use this file except in compliance with the License. You may obtain a copy of
+// the License at
+//
+//   http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+// WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
+// License for the specific language governing permissions and limitations under
+// the License.
+
+var resolveModule = function(names, parent, current, path) {
+  if (names.length == 0) {
+    if (typeof current != "string") {
+      throw ["error","invalid_require_path",
+        'Must require a JavaScript string, not: '+(typeof current)];
+    }
+    return [current, parent, path];
+  }
+  // we need to traverse the path
+  var n = names.shift();
+  if (n == '..') {
+    if (!(parent && parent.parent)) {
+      throw ["error", "invalid_require_path", 'Object has no parent '+JSON.stringify(current)];
+    }
+    path = path.slice(0, path.lastIndexOf('/'));
+    return resolveModule(names, parent.parent.parent, parent.parent, path);
+  } else if (n == '.') {
+    if (!parent) {
+      throw ["error", "invalid_require_path", 'Object has no parent '+JSON.stringify(current)];
+    }
+    return resolveModule(names, parent.parent, parent, path);
+  }
+  if (!current[n]) {
+    throw ["error", "invalid_require_path", 'Object has no property "'+n+'". '+JSON.stringify(current)];
+  }
+  var p = current;
+  current = current[n];
+  current.parent = p;
+  path = path ? path + '/' + n : n;
+  return resolveModule(names, p, current, path);
+};
+
+var Couch = {
+  // moving this away from global so we can move to json2.js later
+  toJSON : function (val) {
+    return JSON.stringify(val);
+  },
+  compileFunction : function(source, ddoc) {    
+    if (!source) throw(["error","not_found","missing function"]);
+    try {
+      if (sandbox) {
+        if (ddoc) {
+          var require = function(name, parent) {
+            if (!parent) {parent = {}};
+            var resolved = resolveModule(name.split('/'), parent.actual, ddoc, parent.id);
+            var s = "function (module, exports, require) { " + resolved[0] + " }";
+            var module = {id:resolved[2], actual:resolved[1]};
+            module.exports = {};
+            try {
+              var func = sandbox ? evalcx(s, sandbox) : eval(s);
+              func.apply(sandbox, [module, module.exports, function(name) {return require(name, module)}]);
+            } catch(e) { 
+              throw ["error","compilation_error","Module require('"+name+"') raised error "+e.toSource()]; 
+            }
+            return module.exports;
+          }
+          sandbox.require = require;
+        }
+        var functionObject = evalcx(source, sandbox);
+      } else {
+        var functionObject = eval(source);
+      }
+    } catch (err) {
+      throw(["error", "compilation_error", err.toSource() + " (" + source + ")"]);
+    };
+    if (typeof(functionObject) == "function") {
+      return functionObject;
+    } else {
+      throw(["error","compilation_error",
+        "Expression does not eval to a function. (" + source.toSource() + ")"]);
+    };
+  },
+  recursivelySeal : function(obj) {
+    // seal() is broken in current Spidermonkey
+    seal(obj);
+    for (var propname in obj) {
+      if (typeof doc[propname] == "object") {
+        recursivelySeal(doc[propname]);
+      }
+    }
+  }
+}
+
+// prints the object as JSON, and rescues and logs any toJSON() related errors
+function respond(obj) {
+  try {
+    print(Couch.toJSON(obj));
+  } catch(e) {
+    log("Error converting object to JSON: " + e.toString());
+    log("error on obj: "+ obj.toSource());
+  }
+};
+
+function log(message) {
+  // idea: query_server_config option for log level
+  if (typeof message != "string") {
+    message = Couch.toJSON(message);
+  }
+  respond(["log", message]);
+};