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#!/usr/bin/env python3
import json
import os
import subprocess
import sys
"""Dict of dicts associating a second person to an amount"""
balance = {}
name2num = {}
num2name = {}
group_id = "GELD!!!"
send_cmd = "signal-cli -u irgendwer send -g irgendwem"
def send(msg):
subprocess.run(send_cmd.split(' '), input=msg.encode())
def create_summary(user):
summary = ""
total = 0
p_balances = balance[user] # failes if user is not in balance
for person in p_balances:
amount = p_balances[person]
if amount == 0:
continue
total -= amount
summary += "\t" + ("<-" if amount < 0 else "->")
summary += " " + person + " " + str(abs(amount).round(2)) + "\n"
if summary == "":
summary = "\tAll fine :)\n"
else:
summary += "\tBalance: " + str(total.round(2))
summary = user + ":\n" + summary
return summary
def create_total_summary():
summary = "Summary:"
for person in balance:
summary += '\n'
summary += "* " + create_summary(person)
return summary
def create_members():
r = ""
for m in name2num:
r += m + ": " + name2num[m] + "\n"
return r
def create_help():
return """
Usage: send a message starting with '!' followed by a command
Commands:
ls | list - print all registered members
help - print this help message
reg name - register the sender with the name: name
sum [name] - print a summary
schieb amount recipient - give money to recipient
zieh amount donor - get money from donor
Happy Geldschieben!
"""
def handle_input(inp):
messages = inp.split("\n\n")
for message in messages:
lines = message.split('\n')
# A message with Body must have at least 4 lines
if len(lines) < 4:
continue
lines[0].lower()
w = lines[0].split(' ')
# Broken message
if len(w) < 4:
print("Broken msg:")
print(message)
continue
# TODO support linked devices
sender_number = w[-3]
body_found = False
body = ""
# message is not in the group with group_id
not_in_group = True
for idx, line in enumerate(lines[1:]):
if line[0:6] == "Body: ":
body = line[6:]
body_found = True
# Only one line bodies are supported
elif body_found:
not_in_group = lines[idx+1].strip() == "Id: " + group_id
break
if not_in_group:
continue
# strip of '\n'
w = body.split(' ')
# supported commands are:
# "!reg" register a name for this number
# "!sum" send a summary to the group
# "!schieb" "!gib" give money to somebody
# "!zieh" "!nimm" add debt of somebody
# "!list" "!ls" list members
# "!help" print all commands
if w[0] == "!reg":
if len(w) != 2:
send('ERROR: not in form "!reg name"')
else:
if w[1] in name2num:
send("ERROR: name already registered")
elif sender_number in num2name:
send("ERROR: you are already registered")
else:
num2name[sender_number] = w[1]
name2num[w[1]] = sender_number
# add to balance
nm = {}
for m in balance:
balance[m][w[1]] = 0
nm[m] = 0
balance[w[1]] = nm
elif w[0] == "!sum":
if len(w) == 1:
send(create_total_summary())
elif len(w) == 2:
if w[1] in name2num:
send("Summary:\n" + create_summary(w[1]))
else:
send("ERROR: name not registered")
else:
send('ERROR: not in form "!sum [name]"')
elif w[0] in ["!schieb", "!gib", "!zieh", "!nimm"]
if len(w) != 3:
send('ERROR: not in form "!cmd amount recipient"')
else:
if not sender_number in num2name:
send('ERROR: you must register first')
elif not w[2] in name2num:
send('ERROR: recipient not known')
else:
sender = num2name[sender_number]
try:
amount = float(w[1])
except:
send("ERROR: amount musst be a number")
continue
if amount < 0:
send("ERROR: amount must be positiv")
continue
if w[0] in ["!zieh", "!nimm"]:
amount *= -1
balance[sender][w[2]] -= amount
balance[w[2]][sender] += amount
p_balance = balance[sender][w[2]]
send("New Balance: {0} {1} {2:g} {3}\n".format(sender, ("->" if p_balance > 0 else "<-"), abs(p_balance), w[2]))
elif w[0] == "!list" or w[0] == "!ls":
send(create_members())
elif w[0] == "!help":
send(create_help())
def main():
global group_id
group_id = os.environ["GSB_GROUP_ID"]
global balance
store_path = os.environ["GSB_STORE_PATH"]
balance_path = store_path + "/balance.json"
registration_path = store_path + "/registration.json"
global name2num
global num2name
global send_cmd
send_cmd = os.environ["GSB_SEND_CMD"]
if os.path.isfile(balance_path):
balance = json.load(open(balance_path, "r"))
if os.path.isfile(registration_path):
name2num = json.load(open(registration_path, "r"))
for name in name2num:
num2name[name2num[name]] = name
handle_input(sys.stdin.read())
with open(balance_path, "w") as f:
json.dump(balance, f)
with open(registration_path, "w") as f:
json.dump(name2num, f)
if __name__ == "__main__":
main()
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