Flag system is able to list all known flags

1 files changed, 13 insertions, 0 deletions

diff --git a/pyfirstaidkit/interpret.py b/pyfirstaidkit/interpret.py
index ace5cea..5217939 100644
--- a/pyfirstaidkit/interpret.py
+++ b/pyfirstaidkit/interpret.py
@@ -29,6 +29,7 @@ class RunDependencies(object):
     """Encapsulate flags used to control the dependencies between plugins"""
     def __init__(self):
         self._provide = set()
+        self._known = set()
 
     def provide(self, id, setactionflag = True):
         """Add flag"""
@@ -52,6 +53,18 @@ class RunDependencies(object):
         """Return True if flag is present, otherwise false"""
         return id in self._provide
 
+    def introduce(self, s):
+        """Notifies the system about dependency names used in the plugins, so we can list them in help"""
+        self._known = self._known.union(s)
+
+    def known(self):
+        """Returns list of known flags"""
+        return list(self._known)
+    
+    def valid(self):
+        """Returns list of valid/provided flags"""
+        return list(self._provide)
+
 class Tasker:
     """The main interpret of tasks described in Config object"""