techoverload/printer/printer.py

import StarTSPImage
from PIL import Image, ImageDraw, ImageFont, ImageOps
import textwrap
import random



import paho.mqtt.client as mqtt

# The callback for when the client receives a CONNACK response from the server.
def on_connect(client, userdata, flags, rc):
    print("Connected with result code "+str(rc))

    # Subscribing in on_connect() means that if we lose the connection and
    # reconnect then subscriptions will be renewed.
    client.subscribe("print")

# The callback for when a PUBLISH message is received from the server.
def on_message(client, userdata, msg):
    print("Print")
    with open("printer/locations.txt") as locations:
    lines = locations.read().splitlines()
    location = random.choice(lines)

with open("printer/actions.txt") as actions:
    lines = actions.read().splitlines()
    action = random.choice(lines)

with open("printer/adverbs.txt") as adverb:
    lines = adverb.read().splitlines()
    adverb = random.choice(lines)

    if random.randint(0,1):
        im=Image.open("printer/image.jpg")
    else:
        im=Image.open("printer/image2.jpg")

    # f = ImageFont.load_default()
    f = ImageFont.truetype("printer/SilkRemington-Regular.otf", 40)
    txt=Image.new('L', (1000,230))
    d = ImageDraw.Draw(txt)

    text = "While {}, {}, {}".format(location, action, adverb)
    text_short = "By the DJ, offer a stranger a drink"
    text_long = "In the outdoor area, ask someone would you rather be known for always being honest or always being kind"

    lines = textwrap.wrap(text, width=23)

    if len(lines) > 2:
        im=Image.open("printer/image.jpg")
    else:
        im=Image.open("printer/image2.jpg")

    y = 0
    n = 0
    for line in lines:
        n += 1
        width, height = f.getsize(line)
        d.text(((1000-width)/2, y), line,  font=f, fill=255)
        y += height
    w=txt.rotate(-90,  expand=1)
    print(n)
    im.paste( ImageOps.colorize(w, (0,0,0), (0,0,0)), ( (n-5)*20 + 127, 5),  w)

    im.show()
    im.save("image_tmp.jpg")

    raster = StarTSPImage.imageToRaster(im, cut=True)

    printer = open('/dev/usb/lp0', "wb")
    #printer.write(raster)


client = mqtt.Client()
client.on_connect = on_connect
client.on_message = on_message

client.connect("", 1883, 60)

# Blocking call that processes network traffic, dispatches callbacks and
# handles reconnecting.
# Other loop*() functions are available that give a threaded interface and a
# manual interface.
client.loop_forever()