Sanitize pad names

1 files changed, 41 insertions, 0 deletions

diff --git a/node/db/PadManager.js b/node/db/PadManager.js
index 36c27263..1aadcd1f 100644
--- a/node/db/PadManager.js
+++ b/node/db/PadManager.js
@@ -39,6 +39,14 @@ var globalPads = {
 };
 
 /**
+ * An array of padId transformations. These represent changes in pad name policy over
+ * time, and allow us to "play back" these changes so legacy padIds can be found.
+ */
+var padIdTransforms = [
+  [/\s+/g, '_']
+];
+
+/**
  * Returns a Pad Object with the callback
  * @param id A String with the id of the pad
  * @param {Function} callback 
@@ -110,6 +118,39 @@ exports.doesPadExists = function(padId, callback)
   });
 }
 
+//returns a sanitized padId, respecting legacy pad id formats
+exports.sanitizePadId = function(padId, callback) {
+  var transform_index = arguments[2] || 0;
+  //we're out of possible transformations, so just return it
+  if(transform_index >= padIdTransforms.length)
+  {
+    callback(padId);
+  }
+  //check if padId exists
+  else
+  {
+    exports.doesPadExists(padId, function(junk, exists)
+    {
+      if(exists)
+      {
+        callback(padId);
+      }
+      else
+      {
+        //get the next transformation *that's different*
+        var transformedPadId = padId;
+        while(transformedPadId == padId && transform_index < padIdTransforms.length)
+        {
+          transformedPadId = padId.replace(padIdTransforms[transform_index][0], padIdTransforms[transform_index][1]);
+          transform_index += 1;
+        }
+        //check the next transform
+        exports.sanitizePadId(transformedPadId, callback, transform_index);
+      }
+    });
+  }
+}
+
 exports.isValidPadId = function(padId)
 {
   return /^(g.[a-zA-Z0-9]{16}\$)?[^$]{1,50}$/.test(padId);