Implemented local port forwarding (closes #15)

src/forwarding.py

@@ -0,0 +1,158 @@
+"""
+Author: Jason Cheung
+Date: 2/8/2020
+
+Description: This is a manager for easily performing SHH port forwards
+"""
+
+import subprocess
+import collections
+
+from utils import module
+import configuration
+
+# INPUT_FILE = configuration.get_config()["portforwards"]
+INPUT_FILE = "./portforwards.txt"
+Computer = collections.namedtuple("Computer", ('user', 'user_num'))
+WELCOME_MESSAGE = "**************************************"
+
+
+def main():
+    """
+    This function inputs all the available hosts from a text file and
+    prompts the user to connect to them
+    :return:
+    """
+    file = module.input_file(INPUT_FILE)
+
+    cmp = []
+    count = 1
+
+    for line in file:
+        cmp.append(Computer(line, count))
+        count += 1
+    menu = []
+
+    for c in cmp:
+        menu.append(str(c.user_num) + ") " + "".join(c.user))
+    menu.append("A) Exit")
+    menu.append("B) Manager tools")
+
+    module.print_menu("SSH forwarding manager V 1.0", menu)
+
+    i = input("Enter Option:")
+
+    if i == '' or i == 'A' or i == 'a':
+        exit_program()
+    elif i == 'B' or i == 'b':
+        sub_menu()
+    else:
+        for c in cmp:
+            if int(i) == c.user_num:
+                subprocess.call(
+                    ["ssh", "-L", c.user.split(":")[2] + ":localhost:"
+                     + c.user.split(":")[2], c.user.split(":")[1]])
+                exit_program()
+
+
+def print_sub_menu():
+    """
+    prints out a sub help menu for other options
+    :return: None
+    """
+    module.print_menu("Options", ["1) Add Host",
+                                  "2) Remove host name",
+                                  "3) Return to ssh forwarding",
+                                  "4) Manage Configuration and Bash",
+                                  "5) Exit"])
+
+
+def sub_menu():
+    """
+    calls printSubMenu and then gets input from user to
+    make appropriate function calls
+    :return: None
+    """
+    print_sub_menu()
+    i = input("Enter selection:")
+
+    if i != '' and int(i) in {1, 2, 3, 4, 5}:
+        options = {1: add_host,
+                   2: remove_host,
+                   3: main,
+                   4: configuration.main,
+                   5: exit_program
+                   }
+        options[int(i)]()
+    else:
+        print("Invalid selection!")
+
+    sub_menu()
+
+
+def print_red(prt): return "\033[91m {}\033[00m".format(prt)
+
+
+def exit_program():
+    """
+    Exits the program and clears the screen
+    :return: None
+    """
+    subprocess.call(["clear"])
+    exit()
+
+
+def add_host():
+    """
+    appends an inputted host name to servers.txt
+    :return: None
+    """
+    host = input("Enter 'user@host' or -1 to exit:")
+    if host != '-1':
+        name = input("Name: ")
+        port = input("Port: ")
+        module.append_file(INPUT_FILE, name + ":" + host + ":" + port)
+
+
+def remove_host():
+    """
+    Removes a host name from servers.txt
+    :return: None
+    """
+    padding_star = "*" * 5
+    max_len = 0
+    file = module.input_file(INPUT_FILE)
+    for line in file:
+        temp = len(line)
+        if max_len < temp:
+            max_len = temp
+    TOP_BAR = padding_star + "*" * max_len + padding_star
+    cmp = []
+    count = 1
+    print(print_red("*" * len(TOP_BAR) + "*"))
+    for line in file:
+        cmp.append(Computer(line, count))
+        count += 1
+    for c in cmp:
+        space = " " * (len(TOP_BAR) - 3 -
+                       len(str(c.user_num) + ") " + c.user))
+        print(print_red("*") + " " + str(c.user_num) + ") " +
+              c.user + space + print_red("*"))
+
+    print(print_red("*" * len(TOP_BAR) + '*'))
+
+    host = input("Enter number of host -1 to exit:")
+    if host != '-1':
+        for c in cmp:
+            if c.user_num == int(host):
+                module.remove_line_from_file(INPUT_FILE, c.user)
+
+
+"""
+Makes sure that other programs don't execute the main
+"""
+if __name__ == '__main__':
+    try:
+        main()
+    except KeyboardInterrupt:
+        exit_program()

src/utils/module.py

@@ -74,26 +74,27 @@ def create_empty_file(file_name):
     subprocess.call(['touch', file_name])
 
 
-TOP_BAR = "**************************************"
+# TOP_BAR = "********************************************"
+# TOP_BAR =
 
 
-def print_magenta(prt): return"\033[95m {}\033[00m" .format(prt)
+def print_magenta(prt): return "\033[95m {}\033[00m".format(prt)
 
 
-def print_green(prt): return "\033[92m {}\033[00m" .format(prt)
+def print_green(prt): return "\033[92m {}\033[00m".format(prt)
 
 
-def print_red(prt): return "\033[91m {}\033[00m" .format(prt)
+def print_red(prt): return "\033[91m {}\033[00m".format(prt)
 
 
-def print_menu_option(s):
+def print_menu_option(s, top_bar_length):
     """
     Prints each host option
     :param s:
     :return:
     """
-    space = " " * (len(TOP_BAR) - 4 - len(s))
-    print(print_magenta("* ") + s + space + print_magenta("*"))  
+    space = " " * (top_bar_length - 4 - len(s))
+    print(print_magenta("* ") + s + space + print_magenta("*"))
 
 
 def print_menu(name, lines):
@@ -111,18 +112,27 @@ def print_menu(name, lines):
     **************************************
 
     """
+    padding_star = "*" * 5
+    temp = 0
+    max_len = 0
+    for s in lines:
+        temp = len(s)
+        if max_len < temp:
+            max_len = temp
+    TOP_BAR = padding_star + "*" * max_len + padding_star
     if not len(name) % 2 == 0:
-        name = name + " "
+        name = name + "  "
+    name = name + " "
     spaces = len(TOP_BAR) - 4 - len(name)
 
     print(print_magenta(TOP_BAR))
 
-    print(print_magenta("*") + 
-        (int(spaces/2) * " ") + 
-        print_green(name) + 
-        (int(spaces/2) * " ") + 
-        print_magenta("*"))
+    print(print_magenta("*") +
+          (int(spaces / 2) * " ") +
+          print_green(name) +
+          (int(spaces / 2) * " ") +
+          print_magenta("*"))
 
     for s in lines:
-        print_menu_option(s)
-    print(print_magenta(TOP_BAR))
+        print_menu_option(s, len(TOP_BAR))
+    print(print_magenta(TOP_BAR))