Update user and developer guides

docs/DeveloperGuide.md

@@ -622,10 +622,49 @@ Use case ends
 > * Program returns error message, saying that command was invalid<br>
   Use case resumes at step 1.
 
+* Command does not end with .xml.
+
+> * Program returns error message, saying that command needs to end with .xml<br>
+  Use case resumes at step 1.
+
 * Specified folder has not been created.
 
 > * Program automatically creates the folder<br>
   Use case ends.
+
+* Specified folder has existing data.
+
+> * User will be asked if user wants to overwrite the existing data.<br>
+  * If yes, use case resumes at step 2.
+  * If no, use case resumes at step 1.
+
+<br></br> 
+### Use case: Load data from a specified file
+
+**MSS**
+
+1. User requests to load data from a file
+2. Program loads data from the specified file
+3. Program restarts itself to reflect loaded data<br>
+Use case ends
+
+**Extension**
+
+* There is no file specified by user.
+
+> * Program returns error message, saying that command was invalid<br>
+  Use case resumes at step 1.
+
+* Command does not end with .xml.
+
+> * Program returns error message, saying that command needs to end with .xml<br>
+  Use case resumes at step 1.
+
+* Specified file has not been created.
+
+> * Program automatically creates the file<br>
+  Use case ends.
+
 <!-- @@author A0139930B -->
 
 ## Appendix C : Non Functional Requirements

docs/UserGuide.md

@@ -248,19 +248,21 @@ Example:
 
 <!-- @@author A0135793W -->
 
-#### Save data: `save`
+#### Save/Load data: `path`
 Saves data to a specified folder.<br>
-Format: `save FILEPATH`
+Format: `path FILEPATH.`
 
-* Windows OS FILEPATH format example: `C:\\Users\\<username>\\Desktop\\CS2103 Tutorial`
-* Mac OS FILEPATH format example: `/Users/<username>/Desktop/CS2103 Tutorial`
+* Windows OS FILEPATH format example: `C:\\Users\\<username>\\Desktop\\CS2103 Tutorial\\TasKitty.xml`
+* Mac OS FILEPATH format example: `/Users/<username>/Desktop/CS2103 Tutorial/TasKitty.xml`
 
+TasKitty must end with a .xml extension.<br>
 TasKitty will save any other FILEPATH format in the same directory as TasKitty.<br>
 TasKitty will automatically create the folder if the folder is not present.<br>
+TasKitty can load data from an existing .xml file if TasKitty is empty.<br>
 
 Example:
-* `save /Users/<username>/Desktop/CS2103 Tutorial`<br>
-  Saves TasKitty data into the folder CS2103 Tutorial.<br>
+* `path /Users/<username>/Desktop/CS2103 Tutorial/TasKitty.xml`<br>
+  Saves TasKitty data into the folder CS2103 Tutorial with TasKitty.xml as the filename.<br>
   If folder CS2103 Tutorial is not present, TasKitty will create the folder.
 
 <br>
@@ -305,7 +307,7 @@ Find | `find KEYWORDS...`
 Edit | `edit INDEX [NEW_NAME] [NEW_DATE] [NEW_START_TIME] [NEW_END_TIME]`
 Delete | `delete INDEX...`
 Done | `done INDEX...`
-Save | `save FILEPATH`
+Path | `path FILEPATH`
 Undo | `undo`
 Help | `help`
 Clear | `clear`