Added gemini protocol and made RSS option work

requirements.txt

@@ -4,6 +4,7 @@ certifi==2020.6.20
 chardet==3.0.4
 feedparser==5.2.1
 idna==2.10
+ignition-gemini==0.1.7
 importlib-metadata==1.7.0
 Pillow==7.2.0
 pycairo==1.19.1

smallprint.py

@@ -11,6 +11,7 @@ import os.path
 # 3rd party imports
 from escpos.printer import Usb, Dummy, File
 import feedparser
+import ignition
 from PIL import Image
 import re
 import requests
@@ -41,7 +42,7 @@ def initialize():
     printer_endpoint = config.get("PRINTER_ENDPOINT") or 0x01
 
     # return Usb(prid1, prid2, printer_interface, printer_endpoint)
-    return File("/dev/usb/lp2")
+    return File("/dev/usb/lp4")
 
 
 def reset_defaults(printer):
@@ -108,7 +109,94 @@ def print_weather(printer):
         logger.error("No weather info available")
 
 
-def print_rss(printer, link, news=1):
+def print_gemini(printer, link):
+    """
+    Given a Gemini link, it prints the file to the printer
+    and tries to do some interpretation if it is gemtext
+    """
+    response = ignition.request(link)
+
+    if not response.success():
+        logger.error(f"Received error {response.status}")
+        return
+
+    reset_defaults(printer)
+    if response.meta == "text/gemini":
+        for raw_line in str(response.data()).split("\n"):
+            line = raw_line.rstrip()
+            if len(line) == 0:
+                printer.text("\n")
+                continue
+
+            if line.startswith("# "):
+                printer.set(align="left",
+                            text_type="BU",
+                            width=2, height=2,
+                            smooth=True)
+                printer.text(line[2:])
+
+            elif line.startswith("## "):
+                printer.set(align="left",
+                            text_type="BU",
+                            width=1, height=1,
+                            smooth=True)
+                printer.text(line[3:])
+
+            elif line.startswith("### "):
+                printer.set(align="left",
+                            font="a",
+                            text_type="U",
+                            width=1, height=1,
+                            smooth=True)
+                printer.text(line[4:])
+
+            elif line.startswith("#### "):
+                printer.set(align="left",
+                            font="b",
+                            text_type="U",
+                            width=1, height=1,
+                            smooth=True)
+                printer.text(line[5:])
+
+            elif line.startswith("=>"):
+                reset_defaults(printer)
+                printer.set(align="left",
+                            font="b")
+                printer.text(line[3:])
+                reset_defaults(printer)
+                lnk = _process_link(link, line[3:])
+                printer.text("\n")
+                printer.qr(lnk, size=4)
+
+            else:
+                printer.set(align="left",
+                            font="b")
+                printer.text(line)
+
+            printer.text("\n")
+
+    else:
+        printer.text(response.data())
+
+
+def _process_link(orig_link, link_text):
+    """
+    Extracts the link from the text, and completes it if
+    necessary
+    """
+    uri = link_text.split()[0]
+
+    if "://" in link_text:
+        return uri
+
+    if link_text.startswith("/"):
+        return orig_link + link_text
+
+    else:
+        return orig_link + "/" + link_text
+
+
+def print_rss(printer, link, news=3):
     """
     Given an RSS link and a printer, prints the news from it
     """
@@ -222,6 +310,7 @@ def create_parser():
 
     parser.add_argument("--weather", default=False)
     parser.add_argument("--news", default=False)
+    parser.add_argument("--gemini", default=False)
     parser.add_argument("--text", nargs=1, default=None)
     parser.add_argument("--file", default=None, type=open)
     parser.add_argument("--image", nargs=1, default=None)
@@ -247,15 +336,11 @@ if __name__ == "__main__":
         print_weather(printer)
         printer.text("\n\n")
 
+    if args.gemini:
+        print_gemini(printer, args.gemini)
+
     if args.news:
-        print_rss(printer, "https://victorhckinthefreeworld.com/feed/")
-        printer.text("\n\n")
-        print_rss(printer, "https://pedalibre.org/feed/")
-        printer.text("\n\n")
-        print_rss(printer, "https://skyandtelescope.org/observing/sky-at-a-glance/feed/")
-        printer.text("\n\n")
-        print_rss(printer, "https://www.space.com/feeds/all", news=2)
-        printer.text("\n\n")
+        print_rss(printer, args.news)
 
     if args.image:
         print_image(printer, args.image[0])