Initial commit

README.md

@@ -1,3 +1,19 @@
 # pos-printer-server
 
 ESC/POS Thermal Printer Server
+
+Prints logs.
+
+Prints images, randomly-generated mazes.
+
+## Install
+
+```
+pip install -r requirements.txt
+```
+
+## Resources
+
+- [escposprinter Python library](https://github.com/Simonefardella/escposprinter)
+- [RPi Maze Printer](https://github.com/mattiasjahnke/rpi-maze-printer)
+

maze/LICENSE

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+MIT License
+
+Copyright (c) 2018 Engineerish
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.

maze/mazy.py

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+#!/usr/bin/python
+
+# import modules used here -- sys is a very standard one
+import sys
+from PIL import Image, ImageDraw
+import math
+import random
+
+class Cell:
+    walls = int('1111', 2)
+    visited = False
+
+    def __init__(self, x, y):
+        self.x = x
+        self.y = y
+
+    def draw(self, draw):
+        global start, end, margin
+
+        if self.walls & 1 == 1:
+            draw.line([(margin + cellSize * self.x, margin + cellSize * self.y + cellSize), (margin + cellSize * self.x + cellSize, margin + cellSize * self.y + cellSize)], fill="black", width=3)
+        if (self.walls >> 1 & 1) == 1:
+            draw.line([(margin + cellSize * self.x + cellSize, margin + cellSize * self.y), (margin + cellSize * self.x + cellSize, margin + cellSize * self.y + cellSize)], fill="black", width=3)
+        if (self.walls >> 2 & 1) == 1:
+            draw.line([(margin + cellSize * self.x, margin + cellSize * self.y), (margin + cellSize * self.x + cellSize, margin + cellSize * self.y)], fill="black", width=3)
+        if (self.walls >> 3 & 1) == 1:
+            draw.line([(margin + cellSize * self.x, margin + cellSize * self.y), (margin + cellSize * self.x, margin + cellSize * self.y + cellSize)], fill="black", width=3)
+
+        if self.x == start[0] and self.y == start[1]:
+            draw.ellipse([margin + cellSize * self.x + cellSize / 4, margin + cellSize * self.y + cellSize / 4, margin + cellSize * self.x + cellSize / 4 + cellSize / 2, margin + cellSize * self.y + cellSize / 4 + cellSize / 2], fill="blue")
+        elif self.x == end[0] and self.y == end[1]:
+            draw.ellipse([margin + cellSize * self.x + cellSize / 4, margin + cellSize * self.y + cellSize / 4, margin + cellSize * self.x + cellSize / 4 + cellSize / 2, margin + cellSize * self.y + cellSize / 4 + cellSize / 2], fill="green")
+
+rows = 0
+cols = 0
+#image = Image.new('RGB', (380, 400 * 2), (0, 0, 0))
+image = Image.new('RGB', (500, 400 * 4), (0, 0, 0))
+draw = ImageDraw.Draw(image)
+cellSize = 20
+margin = 10
+
+matrix = []
+stack = []
+currentCell = None
+biggestStack = 0
+start = (0, 0)
+end = (0, 0)
+
+# Gather our code in a main() function
+def main():
+    global matrix, stack, currentCell, start, rows, cols, cellSize, margin
+    # Setup
+    if len(sys.argv) > 1:
+        cellSize = int(sys.argv[1])
+
+    random.seed()
+    
+    drawingWidth = image.width - margin * 2
+    drawingHeight = image.height - margin * 2
+
+    draw.rectangle([margin, margin, margin + drawingWidth, margin + drawingHeight], fill="white")
+
+    rows = int(math.floor(drawingHeight / cellSize))
+    cols = int(math.floor(drawingWidth / cellSize))
+
+    print(cellSize)
+
+    for y in range(rows):
+        for x in range(cols):
+            matrix.append(Cell(x, y))
+
+    currentCell = matrix[0]
+    start = (currentCell.x, currentCell.y)
+
+    while nrOfUnvisitedCells() > 0:
+        runMazeStep()
+
+    # Draw
+    for cell in matrix:
+        cell.draw(draw)
+
+    image.save("maze.png")
+
+def runMazeStep():
+    global currentCell, stack, end, biggestStack
+
+    currentCell.visited = True
+
+    nei = []
+
+    if currentCell.x > 0:
+        cell = matrix[index(currentCell.x - 1, currentCell.y)]
+        if not cell.visited:
+            nei.append(cell)
+    if currentCell.y > 0:
+        cell = matrix[index(currentCell.x, currentCell.y - 1)]
+        if not cell.visited:
+            nei.append(cell)
+    if currentCell.x < cols - 1:
+        cell = matrix[index(currentCell.x + 1, currentCell.y)]
+        if not cell.visited:
+            nei.append(cell)
+    if currentCell.y < rows - 1:
+        cell = matrix[index(currentCell.x, currentCell.y + 1)]
+        if not cell.visited:
+            nei.append(cell)
+
+    if len(nei) > 0:
+        chosen = random.choice(nei)
+        stack.append(currentCell)
+        if len(stack) > biggestStack:
+            biggestStack = len(stack)
+            end = (chosen.x, chosen.y)
+
+        if chosen.x < currentCell.x:
+            chosen.walls &= ~(1 << 1)
+            currentCell.walls &= ~(1 << 3)
+        elif chosen.x > currentCell.x:
+            chosen.walls &= ~(1 << 3)
+            currentCell.walls &= ~(1 << 1)
+        elif chosen.y > currentCell.y:
+            chosen.walls &= ~(1 << 2)
+            currentCell.walls &= ~(1 << 0)
+        elif chosen.y < currentCell.y:
+            chosen.walls &= ~(1 << 0)
+            currentCell.walls &= ~(1 << 2)
+
+        currentCell = chosen
+    else:
+        currentCell = stack.pop()
+
+
+def nrOfUnvisitedCells():
+    global matrix
+    res = len([cell for cell in matrix if not cell.visited])
+    return res
+
+def index(x, y):
+    global cols
+    return y * cols + x
+
+# Standard boilerplate to call the main() function to begin
+# the program.
+if __name__ == '__main__':
+    main()

print_log.py

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+#!/bin/env python3
+from escpos.printer import Usb
+import getopt
+import sys
+import datetime
+
+TEXT_LIMIT=256
+
+class PrintOptions:
+    title = None
+    text = None
+    verbose = False
+    image = None
+
+def get_printer():
+    return Usb(0x0525, 0xa700) # <-- change based on your printer vendor and product ID
+
+def do_print(options):
+    p = get_printer()
+    p.set(align='center')
+    p.text(str(datetime.datetime.now().strftime("%H:%M:%S")))
+    p.text('         ')
+    p.text(str(datetime.date.today()))
+    p.text('\n')
+    if (options.title):
+        p.set(align='center', text_type='B') # center bold
+        p.text(options.title + '\n')
+    p.set()
+    if len(options.text) > TEXT_LIMIT:
+        p.text(options.text[:TEXT_LIMIT] + '[...]\n(truncated)')
+    else:
+        p.text(options.text + '\n')
+    if options.image != None:
+        p.image(options.image)
+    p.cut()
+
+def do_print_image(path):
+    p = get_printer()
+    p.image(path)
+    p.cut()
+
+def usage():
+    print(f'usage: {sys.argv[0]} [OPTIONS] TEXT...')
+    print(f'  OPTIONS')
+    print(f'    -v ... verbose')
+    print(f'    -h ... help')
+    print(f'    -t --title=X ... title to prepend')
+    print(f'    -i --image=X ... image path')
+    print(f'  TEXT is taken as the rest of argumenats if present,')
+    print(f'    otherwise from STDIN (terminated by Ctrl+D).')
+
+def main():
+    try:
+        opts, args = getopt.getopt(sys.argv[1:], "ht:i:v", ["help", "title=", "image="])
+    except getopt.GetoptError as err:
+        print(err)
+        usage()
+        sys.exit(2)
+    title = None
+    verbose = False
+    image = None
+    for o, a in opts:
+        if o == "-v":
+            verbose = True
+        elif o in ("-h", "--help"):
+            usage()
+            sys.exit()
+        elif o in ("-i", "--image"):
+            image = a
+        elif o in ("-t", "--title"):
+            title = a
+        else:
+            assert False, "unhandled option"
+    options = PrintOptions()
+    options.title = title
+    options.verbose = verbose
+    options.text = " ".join(args)
+    options.image = image
+    if len(options.text) <= 0:
+        for line in sys.stdin:
+            options.text = options.text + line
+    do_print(options)
+
+if __name__ == "__main__":
+    main()
+

requirements.txt

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+python_escpos