celeste

main.py

@@ -1,81 +1,110 @@
-# Setup for the lab environment
-CURRENT_WORKING_DIRECTORY = "/home/user/secret/password"
-FORBIDDEN_FILE = "/home/user/secret/password/secret_data.txt"
 
-#bleep blap boop
-def canonicalize(path):
-    # if it doesn't start with / then slap one on the front
-    if not path.startswith('/'):
-        path = CURRENT_WORKING_DIRECTORY + "/" + path
+cwd = "/home/user/cse453/"
+forbidden = "/home/user/cse453/secret_data.txt"
 
-    # break the path apart to handle dots and slashes
+def canonicalize(path):
+    # "Create a canonicalization function to convert an encoding (the input path) into some canon."
+
+    #establishing absolute directory if one was not provided
+    if not path.startswith("/"):
+        if cwd.endswith("/"):
+            path = cwd + path
+        #not currently needed, but if the cwd was differently formatted (ex. "/home/user/cse453"
+        # the program would have ensured it was properly appended to the front with a separating /
+        # else:
+        #     path = cwd + "/" + pat
+
+    #split the path according to '/' position
     parts = path.split('/')
     stack = []
 
     for part in parts:
         if part == "..":
-            # go back one directory
+            # if go back one directory indicator, remove one directory level from stack
             if stack:
                 stack.pop()
         elif part == "." or part == "":
             # ignore single dots and empty gaps from double slashes
             continue
         else:
-            # just a regular folder or file name
+            # just a regular folder or file name gets added to stack
             stack.append(part)
 
-    # put it back together as a clean path
+    # put stack back together as a path
     return "/" + "/".join(stack)
 
 
 def is_homograph(p1, p2):
-    # compare the "clean" versions of both paths
-    return canonicalize(p1) == canonicalize(p2)
+    # "Create a homograph function that determines if two file paths are the same. It should make use of the work done by the canonicalization function."
+    # "This function should return True or False to indicate whether the two encodings are the same."
+    # note that if provided paths are not the same ex.(secret_data.txt and /home/user/cse453/secret_data.txt) the canon adjusts the directories to be absolute
+    c1 = canonicalize(p1)
+    c2 = canonicalize(p2)
+
+    return c1 == c2
 
 
 def run_tests():
-    # cases that should point to the same file
+    # "Write a function to compare each of your homograph test cases against a forbidden file path to demonstrate that they are the same."
     homographs = [
         "secret_data.txt",
+        #this is a direct match
         "./secret_data.txt",
-        "../password/secret_data.txt",
-        "/home/user/secret/password/../../secret/password/secret_data.txt",
-        "//home//user/secret/password/secret_data.txt"
+        #./ references the current directory, so it's basically the filename by itself
+        "/home/user/cse453/secret_data.txt",
+        # the exact filepath with directory
+        "../cse453/secret_data.txt",
+        #goes up one directory then re-enters that same directory
+        "secret/../secret_data.txt",
+        # enters secret, exits secret
+        "/home/user/cse453/./secret_data.txt",
+        #. referencing current directory, so we stay in cse453
+        "/home/user/cse453/temp/../secret_data.txt",
+        #goes up a directory getting rid of invalid directory "temp" then enters a valid directory
+        "//home//user//cse453//secret_data.txt"
+        #because of how cannonicalize function looks at this, it will simplify to home/user/cse453/secret_data.txt
     ]
 
-    # cases that should point somewhere else
+    # "Write a function to compare each of your non-homograph test cases against a forbidden file path to demonstrate that they are different"
     non_homographs = [
         "../secret_data.txt",
+        #goes up a directory then tries to reference secret_data.txt from a different location that doesn't contain secret_data.txt
         "/home/user/secret_data.txt",
+        # directory path missing cse453
         "password/secret_data.txt",
-        "././../user/secret/password/data"
+        # "password" isn't a folder
+        "././../cse453/password/secret_data.txt",
+        # enter present directory, enter same directory, go up directory try password, which isn't valid directory
+        "secret_data_backup.txt",
+        #non-existent file
+        "/home/user/cse453/secret/secret_data.txt"
+        #no "secret" folder exists
     ]
 
-    print(f"Forbidden: {FORBIDDEN_FILE}")
-    print(f"CWD: {CURRENT_WORKING_DIRECTORY}\n")
+    print(forbidden)
+    print(cwd)
 
-    print("--- Running Homograph Tests ---")
+    print ("homograph tests")
     for test in homographs:
-        result = is_homograph(test, FORBIDDEN_FILE)
+        result = is_homograph(test, forbidden)
         print(f"Result: {result} | Path: {test}")
 
-    print("\n--- Running Non-Homograph Tests ---")
+    print("non_homograph tests")
     for test in non_homographs:
-        result = is_homograph(test, FORBIDDEN_FILE)
+        result = is_homograph(test, forbidden)
         print(f"Result: {result} | Path: {test}")
 
 
 def main():
     while True:
-        print("\n1. Run Automated Tests")
+        print("1. Run Automated Tests")
         print("2. Manual Comparison")
         print("3. Exit")
-
         choice = input("> ")
-
         if choice == '1':
             run_tests()
         elif choice == '2':
+            print("note that if the given path begins with '/' the program will assume it is a complete (absolute) directory")
             path1 = input("Enter first path: ")
             path2 = input("Enter second path: ")
             if is_homograph(path1, path2):