Create pset7-P4-UserspecifeidTriggers.py

Author: iharsh234

pset7-P4-UserspecifeidTriggers.py

@@ -0,0 +1,40 @@
+# PART 4: USER-SPECIFIED TRIGGERS  
+
+def makeTrigger(triggerMap, triggerType, params, name):
+    """
+    Takes in a map of names to trigger instance, the type of trigger to make,
+    and the list of parameters to the constructor, and adds a new trigger
+    to the trigger map dictionary.
+
+    triggerMap: dictionary with names as keys (strings) and triggers as values
+    triggerType: string indicating the type of trigger to make (ex: "TITLE")
+    params: list of strings with the inputs to the trigger constructor (ex: ["world"])
+    name: a string representing the name of the new trigger (ex: "t1")
+
+    Modifies triggerMap, adding a new key-value pair for this trigger.
+
+    Returns a new instance of a trigger (ex: TitleTrigger, AndTrigger).
+    """
+   
+    if triggerType == "TITLE":
+        triggerMap[name] = TitleTrigger(params[0])
+ 
+    elif triggerType == "SUBJECT":
+        triggerMap[name] = SubjectTrigger(params[0])
+ 
+    elif triggerType == "SUMMARY":
+        triggerMap[name] = SummaryTrigger(params[0])
+ 
+    elif triggerType == "NOT":
+        triggerMap[name] = NotTrigger(triggerMap[params[0]])
+ 
+    elif triggerType == "AND":
+        triggerMap[name] = AndTrigger(triggerMap[params[0]], triggerMap[params[1]])
+ 
+    elif triggerType == "OR":
+        triggerMap[name] = OrTrigger(triggerMap[params[0]], triggerMap[params[1]])
+ 
+    elif triggerType == "PHRASE":
+        triggerMap[name] = PhraseTrigger(' '.join(params))
+    return triggerMap[name]
+