add optional argument for month

image_poster.py

@@ -1,5 +1,6 @@
 #! /usr/bin/env python3
 
+import argparse
 import freetype
 import io
 from PIL import Image, ImageDraw, ImageFont
@@ -8,13 +9,19 @@ import datetime as dt
 from dateutil import relativedelta
 
 CURRENT_TIME = dt.date.today()
-NEXT_MONTH = CURRENT_TIME
+NEXT_MONTH = CURRENT_TIME + relativedelta.relativedelta(months=1, day=1)
 DAYS_OF_WEEK_SR = ("PON", "UTO", "SRE", "ČET", "PET", "SUB", "NED")
 MONTHS_SR = ("Januar", "Februar", "Mart", "April", "Maj", "Jun", "Jul", "Avgust",\
         "Septembar", "Oktobar", "Novembar", "Decembar")
 
+def parseArgs(parser):
+    """
+        Parse all arguments and return the list of argument values
+    """
+    parser.add_argument("month", metavar = "MM", help = "two digit number representing the month for which to generate poster", default = "empty", nargs = "?")
+    return parser.parse_args()
 
-def load_events(csv_path:str) -> list[dict]:
+def load_events(csv_path:str, month:int) -> list[dict]:
     events = []
     with open(csv_path) as csv_file:
         csv_reader = csv.reader(csv_file)
@@ -27,11 +34,11 @@ def load_events(csv_path:str) -> list[dict]:
             current_event = {"date":event_date_parsed,
                              "time":event_time,
                              "title":event_title.strip()}
-            if event_date_parsed >= NEXT_MONTH:
+            if event_date_parsed >= month:
                 events.append(current_event)
         return events
 
-def drawPoster(events, bg, fg):
+def drawPoster(events, bg, fg, month:int):
     fontFacade = ImageFont.truetype('./site/font/Facade-Sud.woff', size=110)
     fontIosevka = ImageFont.truetype('./site/font/iosevka-regular.woff', size=60)
     fontIosevkaSmall = ImageFont.truetype('./site/font/iosevka-regular.woff', size=45)
@@ -45,7 +52,7 @@ def drawPoster(events, bg, fg):
     _, _, w, _ = draw.textbbox((0, 0), header, font=fontFacade)
     draw.text(((W-w)/2, 120), header, font=fontFacade, fill=fg)
 
-    subheader = f"Plan za {MONTHS_SR[NEXT_MONTH.month - 1]}"
+    subheader = f"Plan za {MONTHS_SR[month.month - 1]}"
     _, _, w, _ = draw.textbbox((0, 0), subheader, font=fontIosevka)
     draw.text(((W-w)/2, 240), subheader, font=fontIosevka, fill=fg)
 
@@ -79,11 +86,26 @@ def drawPoster(events, bg, fg):
 
     return img
 
+def main():
+    # Parse arguments
+    parser = argparse.ArgumentParser(description="Generate images of the poster")
+    args = parseArgs(parser)
 
-events = load_events("dogadjaji.csv")
+    # Set month based on user input
+    month = NEXT_MONTH
+    if args.month.isdigit():
+      month = dt.date(CURRENT_TIME.year, int(args.month), 1)
+    elif args.month != "empty":
+      print("Month has to be specified as a number. I will use next month as the default")
 
-img = drawPoster(events, (0, 0, 0), (20, 250, 50))
+    # Load events and draw a poseter
+    events = load_events("dogadjaji.csv", month)
+
+    img = drawPoster(events, (0, 0, 0), (20, 250, 50), month)
     img.save('poster_dark.png')
 
-img = drawPoster(events, (255, 255, 255), (0, 0, 0))
+    img = drawPoster(events, (255, 255, 255), (0, 0, 0), month)
     img.save('poster_light.png')
+
+if __name__ == "__main__":
+    main()