dcalerts 1.0.1

Utilities that let you send Discord messages from code.

dcalerts

Provides different utilities, decorators and classes that let the user send Discord messages from code.

Installation

You can install directly from GitHub:

pip install git+https://github.com/WoolyMamooth/dcalerts

Or the latest stable release from PyPI:

pip install dcalerts

Quickstart

from dcalerts import DcalertsSettings, Notifier

dcalerts_settings=DcalertsSettings(
    webhook = webhook_url,
    before = "Starting code.",
    after = "Code finished.",
    send_error = True
)

with Notifier(dcalerts_settings) as notifier:
    print("Doing stuff")

Usage

Settings

---

dcalerts uses a special dict class called DcalertsSettings to track what messages you want to send and where. In the code it is uniformly referred to as dcalerts_settings. It can have the following items:

• webhook : Can be either a str or a MessageHandler object. It should be the link you get from your Discord channel. You can learn how to make one HERE. This is where your messages will be sent to.
• before : Optional. This is the message that is sent before your given code starts execution. Used by decorators and context managers.
• after : Optional. This is the message that is sent after your given code finishes. Used by decorators and context managers.
• separator : Optional. Used to separate the multiple items in messages. (more on this below)
• send_error : Optional. If it is set to True any errors that stop the program will be sent to the webhook as well. False by default.
• error_message : Optional. This will be the message sent together with the error text if an error is encountered. Default is "ERROR:".

Messages can be strings, lists, lists of lists, or functions. Your message will always pass through the make_message() function. This will execute all functions in the message, cast everything to string and fuse together all items of the list in order putting the separator string between them. For example this is a valid message you could put in after:

def result_function():
    return ["Something something", 42]

dcalerts_settings["after"] = ["Your code is done. Results:", result_function]

Simple messaging

---

For this you don't even need your dcalerts_settings (but you can use it if you have one). You can simply use a webhook url to send a message.

from dcalerts import send_message

send_message(webhook_url, "This is a message.")

# OR

send_message(dcalerts_settings, "This is a message.")

If you want to send many messages to the same channel, but don't need anything fancy, you can use a MessageHandler:

from dcalerts import MessageHandler

message_handler = MessageHandler(webhook_url)

# OR

message_handler = MessageHandler(dcalerts_settings)

message_handler.send("This is a message.")

These also use make_message, so you can complicate messages as much as you like

send_message(webhook_url, ["This is a message.", [42, result_function]])

Context manager

---

The package offers a context manager class called Notifier. You can use this to send messages before, during and after code execution. For example:

from dcalerts import Notifier, DcalertsSettings
from dcalerts.utils import code_block

class Testclass:
    def __init__(self, num):
        self.num = num

    def get_num(self):
        return self.num

testobj = Testclass(42)

dcalerts_settings=DcalertsSettings(
    webhook = webhook_url,
    before = "Starting code.",
    after = ["Code finished. Result:", code_block(testobj.get_num)],
)

with Notifier(dcalerts_settings) as notifier:
    # dcalerts_settings["before"] is sent here. The message will be: "Starting code."
    print("Doing stuff.")
    # we change testobj.num here
    testobj.num = 43
    notifier.send(["Partial result:",testobj.get_num]) # The message will be: "Partial result: 43"
    print("Doing more stuff.")
    # we change testobj.num again
    testobj.num = 44
    # dcalerts_settings["after"] is sent here. The message will be: "Code finished. Result: 44"

Decorator

---

There is also a decorator you can use to send messages before and after running your function. You can use this in multiple ways:

from dcalerts import notify
from time import sleep

@notify
def foo(t):
    sleep(t)

foo(10, dcalerts_settings=dcalerts_settings)

Or:

@notify(dcalerts_settings=dcalerts_settings)
def foo(t)
    sleep(t)

foo(10)

Or:

def foo(t):
    sleep(t)

foo = notify(dcalerts_settings)(foo)
foo()

Utils

---

The following utility functions are available in dcalerts.utils. They return text in a format that Discord interprets in a special way. Most of them use make_message to make it simpler to use them:

• create_timer(seconds_from_now) : Returns a string which Discord reads as a timer to a given second.
• code_block(text, language="") : Wraps text in a code block.
• inline_code(text) : Wraps text in inline code.
• bold(text) : Makes text bold.
• italic(text) : Makes text italic.
• underline(text) : Underlines text.
• strikethrough(text) : Strikes through text.
• spoiler(text) : Makes text a spoiler.
• quote(text) : Quotes text.
• block_quote(text) : Quotes text in a block.
• link(text, url) : Creates a hyperlink.
• mention(user_id) : Mentions a user.
• channel_mention(channel_id) : Mentions a channel.
• role_mention(role_id) : Mentions a role.
• emoji(emoji_id) : Adds an emoji.
• header(text, level=1) : Creates a header.

Misc

---

To check the default value of any of the settings, you can use the DEFAULTS dictionary.

from dcalerts import DEFAULTS

print(DEFAULTS)

There is a Specialsep class used internally that changes the separator character mid-message. This is mainly used by the utils functions, because their output has to be formatted in a special way. (for example Discord understands emojis if you write their name like this: :emoji:, so we can't have a whitespace after the : character). If you want to, you can use it like this:

from dcalerts.messages import Specialsep

send_message(webhook, ["This is a message", [Specialsep("\n"),"Everything in", "this list", "is a new line"], "but not this."], list_item_sep=" ")