CmdPurge: Remove purged tasks from dependencies

src/commands/CmdPurge.cpp

@@ -29,6 +29,7 @@
 #include <Context.h>
 #include <Filter.h>
 #include <i18n.h>
+#include <main.h>
 
 extern Context context;
 
@@ -55,9 +56,10 @@ int CmdPurge::execute (std::string&)
   int rc = 0;
   int count = 0;
 
-  // Apply filter.
   Filter filter;
   std::vector <Task> filtered;
+
+  // Apply filter.
   filter.subset (filtered);
   if (filtered.size () == 0)
   {
@@ -67,13 +69,28 @@ int CmdPurge::execute (std::string&)
 
   for (auto& task : filtered)
   {
+    std::string uuid = task.get ("uuid");
+
     if (task.getStatus () == Task::deleted)
     {
-        context.tdb2.purge (task);
+      context.tdb2.purge (task);
-        count++;
+      count++;
+
+      // Remove dependencies on the task being purged
+      for (auto& blockedConst: context.tdb2.all_tasks ())
+      {
+        Task& blocked = const_cast<Task&>(blockedConst);
+        if (blocked.has ("depends") &&
+            blocked.get ("depends").find (uuid) != std::string::npos)
+        {
+            blocked.removeDependency (uuid);
+            context.tdb2.modify (blocked);
+        }
+      }
     }
   }
 
+  feedback_affected (count == 1 ? STRING_CMD_PURGE_1 : STRING_CMD_PURGE_N, count);
   return rc;
 }
 

src/l10n/eng-USA.h

@@ -397,6 +397,8 @@
 #define STRING_CMD_DUPLICATE_N       "Duplicated {1} tasks."
 
 #define STRING_CMD_PURGE_USAGE       "Removes the specified task from the data files. Causes permanent loss of data."
+#define STRING_CMD_PURGE_1           "Purged {1} task."
+#define STRING_CMD_PURGE_N           "Purged {1} tasks."
 
 #define STRING_CMD_START_USAGE       "Marks specified task as started"
 #define STRING_CMD_START_NO          "Task not started."