Merge pull request #191 from qiujiaaa/docs

Update UG and error messages

docs/UserGuide.adoc

@@ -535,7 +535,9 @@ Date should be in the format YYYY.MM.DD with valid year, month and date.
 ==== Add a schedule : `add-s`
 Adds a schedule. +
 If there are conflicts with the existing schedules, use the `-allow` flag to allow clashing schedules, or change the time. +
-[underline]#Format#: `add-s ORDER_INDEX cd/DATE ct/TIME v/VENUE [t/TAG]… [-allow] ` +
+*Note*: You can add multiple schedules at the same time slot but it will affect the visibility of the order index on the schedule. +
+
+[underline]#Format#: `add-s ORDER_INDEX cd/DATE ct/TIME v/VENUE [t/TAG]… [-allow]` +
 [underline]#Example#: +
 
 * `add-s 3 cd/2018.7.25 ct/18.00 v/Starbucks t/freebie -allow` +
@@ -567,6 +569,8 @@ Deletes a schedule. +
 ==== Edit a schedule : `edit-s`
 Edits an existing schedule. +
 If there are conflicts with the existing schedules, use the `-allow` flag to allow clashing schedules, or change the time. +
+*Note*: You can add multiple schedules at the same time slot but it will affect the visibility of the order index on the schedule. +
+
 [underline]#Format#: `edit-s ORDER_INDEX [cd/DATE] [ct/TIME] [v/VENUE] [t/TAG]… [-allow]`
 ****
 - Edits the schedule of the order at the specified `ORDER_INDEX`.
@@ -581,6 +585,11 @@ If there are conflicts with the existing schedules, use the `-allow` flag to all
 * Edit the date of the schedule of the 1st order and allow it to clash with the existing schedules. +
 `edit-s 1 cd/2019.12.12 -allow`
 
+==== Clear the schedules : `clear-s`
+Clears every schedule in SML. +
+
+[underline]#Format#: `clear-s`
+
 === General Commands
 
 ==== Undo : `undo`

src/main/java/seedu/address/commons/core/Messages.java

@@ -23,13 +23,13 @@ public class Messages {
     public static final String MESSAGE_SCHEDULE_CONFLICT = "Scheduling conflict detected. Add \"-allow\" flag to "
             + "confirm overlapping schedules.";
 
-    public static final String TIME_MESSAGE_CONSTRAINTS = "Time should only contain numbers in the format of HH.MM";
+    public static final String TIME_MESSAGE_CONSTRAINTS = "Time should only contain numbers in the format of HH.MM, "
+            + "with valid hour and minute.";
     public static final String DATE_MESSAGE_CONSTRAINTS_LESS_THAN_DEFAULT = "Year should not be less than 1970";
-
     public static final String DATE_MESSAGE_CONSTRAINTS_LESS_THAN_0 =
             "Date should only contain numbers in the format of YYYY.MM.DD and be positive";
     public static final String DATE_MESSAGE_CONSTRAINTS =
-            "Date should only contain numbers in the format of YYYY.MM.DD";
+            "Date should only contain numbers in the format of YYYY.MM.DD, with valid year, month and date.";
     public static final String OPTIONAL_DATE_MESSAGE_CONSTRAINTS =
             "Date should have starting and ending in the format YYYY.MM.DD\n"
                     + "Example: d1/2018.10.05 d2/2019.04.12";