Added a scrolling ncurses menu for manage mode.

gempost

@@ -11,6 +11,9 @@ from sys import argv
 from hashlib import sha1
 from random import random
 
+import curses
+from math import ceil
+
 # colored output functions
 def prRed(skk): print("\033[91m {}\033[00m" .format(skk))
 def prGreen(skk): print("\033[92m {}\033[00m" .format(skk))
@@ -27,6 +30,99 @@ postDir = wdir + "postdir/" # all post files along with the archive.gmi are stor
 indexFile = wdir + "postIndex" # the index is maintained in this file
 editor = "nano --restricted -t"
 
+def menuFunction(menu = []):
+    stdscr = curses.initscr() # initializing curses
+    curses.noecho()
+    curses.cbreak()
+    stdscr.keypad(True)
+
+    sy, sx = stdscr.getmaxyx() # getting terminal dimensions
+    pageLength = sy - 5 # no. of items I can show in a single page.
+    pages = ceil(len(menu)/pageLength) + 1 # calculating the no. of pages required
+
+    pageIndex = 1 # current page
+    imenu = [] # internal list that is modified to only contain items of a specific page
+
+    endOfPage = pageLength # separate variable is required for this because the last page might have lesser entries than {pageLength}
+
+    imenu = menu[((pageLength)*(pageIndex-1)):(pageLength*pageIndex)]
+
+    if (menu == []): # do nothing if list is empty
+        curses.endwin()
+        print("There is nothing to manage.")
+        return None
+
+    highlight, highlight_prev = 0, 0 # variable that controls which entry is selected, variable that stores its previous value
+    while True:
+        stdscr.clear()
+
+        if (highlight >= endOfPage): # incrementing page number
+            if (pageIndex == pages - 1) or (pageIndex == 1):
+                highlight = highlight_prev
+                pass
+            else:
+                pageIndex += 1 # incrementing page index
+                imenu = [] # resetting imenu
+                try:
+                    imenu = menu[((pageLength)*(pageIndex-1)):(pageLength*pageIndex)] # only {pageLength} no. of items
+                except IndexError:
+                    try:
+                        imenu = menu[((pageLength)*(pageIndex-1)):]
+                    except IndexError:
+                        pass
+                endOfPage = len(imenu)
+                highlight = 0
+
+        if (highlight < 0): # decrementing page number
+            if (pageIndex == 1):
+                highlight = highlight_prev
+                pass
+            else:
+                pageIndex -= 1
+                imenu = []
+                try:
+                    imenu = menu[((pageLength)*(pageIndex-1)):(pageLength*pageIndex)]
+                except IndexError:
+                    pass
+                #sno = pageLength*(pageIndex-1)
+                endOfPage = len(imenu)
+                highlight = endOfPage - 1
+
+        stdscr.addstr("Use the arrow keys to make a selection. Press 'c' to cancel.\n")
+
+        for sno in range(len(imenu)):
+            if (sno == highlight):
+                stdscr.addstr(f"\n{((pageLength)*(pageIndex-1)) + (sno+1)} - {imenu[sno]}", curses.A_STANDOUT)
+            else:
+                stdscr.addstr(f"\n{((pageLength)*(pageIndex-1)) + (sno+1)} - {imenu[sno]}")
+            sno += 1
+
+        stdscr.addstr(f"\n\npage {pageIndex} / {pages - 1}\n") # a line on the bottom showing page number
+        stdscr.refresh()
+
+        c = stdscr.getch()
+
+        if (c == ord('c')): # None is returned so that no action is taken
+            highlight = None
+            break
+
+        elif (c == curses.KEY_DOWN):
+            highlight_prev = highlight
+            highlight += 1
+
+        elif (c == curses.KEY_UP):
+            highlight_prev = highlight
+            highlight -= 1
+
+        elif (c == curses.KEY_ENTER or c == 10 or c == 13):
+            break
+
+    curses.endwin()
+    if (highlight != None):
+        return (pageLength * (pageIndex-1)) + highlight
+    else:
+        return highlight
+
 def checkInit():
     """ Checks if the public_gemini/ directory has been initialized for use with gempost or is missing some files. """
     contents = listdir(wdir)
@@ -176,6 +272,11 @@ def manage():
     for i in allposts: # creating a list containing titles corresponding to filenames
         postsList.append([i[56:-1],i[11:51]])
 
+    menuItems = []
+    for i in postsList: # formatting it into a string list for the ncurses menu function
+        menuItems.append(f"{i[0]} | {i[1]}")
+    
+    """
     print() # line break
     try:
         counter = 0
@@ -187,6 +288,11 @@ def manage():
     except:
         prRed("\n Invalid selection. Exiting...")
         return 0
+    """
+
+    which = menuFunction(menuItems)
+    print(f"\nYou have selected:\n\nTitle: {postsList[which][0]}\nFilename: {postsList[which][1]}.gmi")
+
     try:
         mode = int(input("\nSELECT MODE:\n1 - EDIT\n2 - DELETE\n3 - CANCEL\n-> ")) # what does the user want to do with the selection?
     except ValueError: