From 802368ba4cb4291b0b147e447aa3a1d17906be7f Mon Sep 17 00:00:00 2001
From: Shy <shy@koeln.ccc.de>
Date: Tue, 14 Mar 2017 14:46:51 +0100
Subject: [PATCH] Initial commit

---
 kitchentext.py | 138 +++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 138 insertions(+)
 create mode 100755 kitchentext.py

diff --git a/kitchentext.py b/kitchentext.py
new file mode 100755
index 0000000..6cc6472
--- /dev/null
+++ b/kitchentext.py
@@ -0,0 +1,138 @@
+#!/bin/python
+#
+# kitchentext: Read text from stdin and put it on the Kitchenlight
+
+def kitchentext(delay=200, single=False, wait=False, restore=False, poweron=False,
+        verbose=False, debug=False):
+
+    import sys
+    from c4ctrl import C4Interface, Kitchenlight
+
+    charwidth = { # Width of characters
+        'a' : 5, 'A' : 5, 'b' : 4, 'B' : 5,
+        'c' : 3, 'C' : 5, 'd' : 4, 'D' : 5,
+        'e' : 4, 'E' : 5, 'f' : 3, 'F' : 5,
+        'g' : 3, 'G' : 5, 'h' : 3, 'H' : 5,
+        'i' : 1, 'I' : 5, 'j' : 2, 'J' : 5,
+        'k' : 3, 'K' : 5, 'l' : 3, 'L' : 5,
+        'm' : 5, 'M' : 5, 'n' : 4, 'N' : 5,
+        'o' : 3, 'O' : 5, 'p' : 3, 'P' : 5,
+        'q' : 3, 'Q' : 5, 'r' : 3, 'R' : 5,
+        's' : 4, 'S' : 5, 't' : 3, 'T' : 5,
+        'u' : 3, 'U' : 5, 'v' : 3, 'V' : 5,
+        'w' : 5, 'W' : 5, 'x' : 3, 'X' : 5,
+        'y' : 3, 'Y' : 5, 'z' : 3, 'Z' : 5,
+        '0' : 5, '1' : 4, '2' : 5, '3' : 5,
+        '4' : 5, '5' : 5, '6' : 5, '7' : 5,
+        '8' : 5, '9' : 5, '@' : 5, '=' : 3,
+        '!' : 1, '"' : 3, '_' : 5, '-' : 3,
+        '.' : 2, ',' : 2, '*' : 5, ':' : 2,
+        '\'' : 1, '/' : 5, '(' : 2, ')' : 2,
+        '{' : 3, '}' : 3, '[' : 2, ']' : 2,
+        '<' : 3, '>' : 4, '+' : 5, '#' : 5,
+        '$' : 5, '%' : 5, '$' : 5, '~' : 5,
+        '?' : 3, ';' : 2, '\\' : 5, '^' : 3,
+        '|' : 1, '`' : 2, ' ' : 3, '\t' : 5
+        }
+
+    C4Interface.debug = debug
+    kl = Kitchenlight(autopower=poweron)
+
+    # Enforce wait=True if restore=True or single=False
+    wait = wait or restore or not single
+
+    # Store previous state
+    if restore:
+        c4 = C4Interface([kl.topic, kl.powertopic])
+        safe = c4.fetch()
+
+    try:
+        stop = False
+        while not stop:
+            # Only itarate once if single is set
+            stop = single
+
+            try:
+                text = sys.stdin.readline()
+            except KeyboardInterrupt: # Exit a bit more graceful on CTRL-C
+                verbose and sys.stderr.write("\rInterrupted by user\n")
+                sys.exit(1)
+
+            if single and text.rstrip('\n') == "":
+                verbose and sys.stderr.write("Error: empty input!\n")
+                sys.exit(1)
+            elif text == "\n": # Empty line
+                verbose and print("Info: skipping empty line")
+                continue
+            elif text == "": # EOF
+                break
+
+            # Strip chars Kitchenlight can not display
+            text = text.rstrip('\n').encode("ascii", "ignore").decode("ascii")
+
+            try: # We might well get interrupted while waiting
+                kl.text(text, delay)
+
+                if wait:
+                    from time import sleep
+                    # How long shall we wait?
+                    # Kitchenlight has 30 columns, each char uses 2-5 columns followed by an empty
+                    # one. The traversal of one column takes 30 * <delay> ms.
+                    twidth = 0
+                    for c in text:
+                        try:
+                            twidth += (charwidth[c] + 1)
+                        except KeyError:
+                            twidth += 4 # Fallback
+                    wait_for = ((30 * delay) + (twidth * delay))/1000
+                    verbose and print("Waiting for {} seconds ...".format(wait_for))
+                    sleep(wait_for)
+
+            except KeyboardInterrupt:
+                verbose and sys.stderr.write("\rInterrupted by user\n")
+                sys.exit(1)
+
+    finally:
+        # Always restore privious state if "restore" is set
+        if restore:
+            re = []
+            for top in safe: re.append((top.topic, top.payload))
+            c4.update(re)
+
+
+if __name__ == "__main__":
+    import argparse
+
+    parser = argparse.ArgumentParser(
+        description="Read text from stdin and put it on the Kitchenlight")
+    parser.add_argument(
+        "-d", "--delay", type=int, default=200,
+        help="delay in ms (speed of the text, default is 200)")
+    parser.add_argument(
+        "-s", "--single", action="store_true",
+        help="only read a single line")
+    parser.add_argument(
+        "-w", "--wait", action="store_true", default=False,
+        help="wait until the text has been displayed")
+    parser.add_argument(
+        "-r", "--restore", action="store_true", default=False,
+        help="restore the Kitchenlight to its prior state after the text has been displayed (implies --wait)")
+    parser.add_argument(
+        "-p", "--power-on", action="store_true", default=False,
+        help="turn on Kitchenlight if it is powered off")
+    parser.add_argument(
+        "-v", "--verbose", action="store_true",
+        help="be (not much) more verbose")
+    parser.add_argument(
+        "--debug", action="store_true",
+        help="display what would be send to the MQTT broker, but do not actually connect")
+    args = parser.parse_args()
+
+    kitchentext(delay=args.delay,
+                single=args.single,
+                wait=args.wait,
+                restore=args.restore,
+                poweron=args.power_on,
+                verbose=args.verbose,
+                debug=args.debug)
+