The Functions in Keep Workflow Engine are utilities that can be used to manipulate data, check conditions, or perform transformations within workflows. This document provides a brief overview and usage examples for each available function.
Mathematical Functions
add
Description: Adds all provided numbers together. All arguments are converted to integers.
Example:
steps:
- name: example-step
provider:
type: mock
with:
message: keep.add(1, 2, 3) # Output: 6
message2: keep.add(10, 20, 30) # Output: 60
sub
Description: Subtracts all subsequent numbers from the first number. All arguments are converted to integers.
Example:
steps:
- name: example-step
provider:
type: mock
with:
message: keep.sub(10, 2, 3) # Output: 5
message2: keep.sub(100, 20, 30) # Output: 50
mul
Description: Multiplies all provided numbers together. All arguments are converted to integers.
Example:
steps:
- name: example-step
provider:
type: mock
with:
message: keep.mul(2, 3, 4) # Output: 24
message2: keep.mul(5, 6, 7) # Output: 210
div
Description: Divides the first number by all subsequent numbers. All arguments are converted to integers. Returns an integer if the division result is whole, otherwise returns a floating-point number.
Example:
steps:
- name: example-step
provider:
type: mock
with:
message: keep.div(10, 2) # Output: 5
message2: keep.div(10, 3) # Output: 3.3333333333333335
message3: keep.div(100, 2, 5) # Output: 10
mod
Description: Calculates the remainder of dividing the first number by all subsequent numbers sequentially. All arguments are converted to integers.
Example:
steps:
- name: example-step
provider:
type: mock
with:
message: keep.mod(10, 3) # Output: 1
message2: keep.mod(100, 30, 7) # Output: 2
exp
Description: Raises the first number to the power equal to the product of all subsequent numbers. All arguments are converted to integers.
Example:
steps:
- name: example-step
provider:
type: mock
with:
message: keep.exp(2, 3) # Output: 8
message2: keep.exp(2, 3, 2) # Output: 64
fdiv
Description: Performs integer division of the first number by all subsequent numbers sequentially. All arguments are converted to integers.
Example:
steps:
- name: example-step
provider:
type: mock
with:
message: keep.fdiv(10, 3) # Output: 3
message2: keep.fdiv(100, 3, 2) # Output: 16
Description: Checks if two values are equal.
Example:
steps:
- name: example-step
provider:
type: mock
with:
message: keep.eq(5, 5) # Output: true
message2: keep.eq("hello", "world") # Output: false
message3: keep.eq([1, 2, 3], [1, 2, 3]) # Output: true
String Functions
uppercase
Description: Converts a string to uppercase.
Example:
steps:
- name: example-step
provider:
type: mock
with:
message: "keep.uppercase('hello world')" # Output: "HELLO WORLD"
lowercase
Description: Converts a string to lowercase.
Example:
steps:
- name: example-step
provider:
type: mock
with:
message: "keep.lowercase('HELLO WORLD')" # Output: "hello world"
capitalize
Description: Capitalizes the first character of a string.
Example:
steps:
- name: example-step
provider:
type: mock
with:
message: keep.capitalize("hello world") # Output: "Hello world"
title
Description: Converts a string to title case (capitalizes each word).
Example:
steps:
- name: example-step
provider:
type: mock
with:
message: keep.title("hello world") # Output: "Hello World"
split
Description: Splits a string into a list using a delimiter.
Example:
steps:
- name: example-step
provider:
type: mock
with:
message: "keep.split('a,b,c', ',')" # Output: ["a", "b", "c"]
strip
Description: Removes leading and trailing whitespace from a string.
Example:
steps:
- name: example-step
provider:
type: mock
with:
message: keep.strip(" hello world ") # Output: "hello world"
replace
Description: Replaces occurrences of a substring with another string.
Example:
steps:
- name: example-step
provider:
type: mock
with:
message: keep.replace("hello world", "world", "Keep") # Output: "hello Keep"
remove_newlines
Description: Removes all newline and tab characters from a string.
Example:
steps:
- name: example-step
provider:
type: mock
with:
message: keep.remove_newlines("hello\nworld\t!") # Output: "helloworld!"
encode
Description: URL-encodes a string.
Example:
steps:
- name: example-step
provider:
type: mock
with:
message: keep.encode("hello world") # Output: "hello%20world"
slice
Description: Extracts a portion of a string based on start and end indices.
Example:
steps:
- name: example-step
provider:
type: mock
with:
message: keep.slice("hello world", 0, 5) # Output: "hello"
List and Dictionary Functions
first
Description: Retrieves the first element from a list.
Example:
steps:
- name: example-step
provider:
type: mock
with:
message: keep.first([1, 2, 3]) # Output: 1
last
Description: Retrieves the last element from a list.
Example:
steps:
- name: example-step
provider:
type: mock
with:
message: keep.last([1, 2, 3]) # Output: 3
index
Description: Retrieves an element at a specific index from a list.
Example:
steps:
- name: example-step
provider:
type: mock
with:
message: keep.index(["a", "b", "c"], 1) # Output: "b"
join
Description: Joins a list of elements into a string using a delimiter.
Example:
steps:
- name: example-step
provider:
type: mock
with:
message: keep.join(["a", "b", "c"], ",") # Output: "a,b,c"
len
Description: Returns the length of a list.
Example:
steps:
- name: example-step
provider:
type: mock
with:
message: keep.len([1, 2, 3]) # Output: 3
dict_to_key_value_list
Description: Converts a dictionary into a list of key-value pairs.
Example:
steps:
- name: example-step
provider:
type: mock
with:
message: keep.dict_to_key_value_list({"a": 1, "b": 2}) # Output: ["a:1", "b:2"]
dict_pop
Description: Removes specified keys from a dictionary.
Example:
steps:
- name: example-step
provider:
type: mock
with:
message: keep.dict_pop({"a": 1, "b": 2, "c": 3}, "a", "b") # Output: {"c": 3}
dict_pop_prefix
Description: Removes all keys that start with a specified prefix from a dictionary.
Example:
steps:
- name: example-step
provider:
type: mock
with:
message: keep.dict_pop_prefix({"a_1": 1, "a_2": 2, "b_1": 3}, "a_") # Output: {"b_1": 3}
dict_filter_by_prefix
Description: Returns only the dictionary entries whose keys start with a specified prefix.
Example:
steps:
- name: example-step
provider:
type: mock
with:
message: keep.dict_filter_by_prefix({"a_1": 1, "a_2": 2, "b_1": 3}, "a_") # Output: {"a_1": 1, "a_2": 2}
dictget
Description: Gets a value from a dictionary with a default fallback.
Example:
steps:
- name: example-step
provider:
type: mock
with:
message: keep.dictget({"a": 1, "b": 2}, "c", "default") # Output: "default"
Date and Time Functions
from_timestamp
Description: Converts unix timestamp int, float or string to datetime object, with optional timezone option.
Example:
steps:
- name: example-step
provider:
type: console
with:
message: keep.from_timestamp(1717244449.0) # will print "2024-06-01 12:20:49+00:00"
# or with timezone
# message: keep.from_timestamp(1717244449.0, "Europe/Berlin") # will print "2024-06-01 14:20:49+02:00"
utcnow
Description: Returns the current UTC datetime.
Example:
steps:
- name: example-step
provider:
type: mock
with:
message: keep.utcnow()
utcnowtimestamp
Description: Returns the current UTC datetime as a Unix timestamp (seconds since epoch).
Example:
steps:
- name: example-step
provider:
type: mock
with:
message: keep.utcnowtimestamp() # Output: 1704067200
utcnowiso
Description: Returns the current UTC datetime in ISO format.
Example:
steps:
- name: example-step
provider:
type: mock
with:
message: keep.utcnowiso()
to_utc
Description: Converts a datetime string or object to UTC.
Example:
steps:
- name: example-step
provider:
type: mock
with:
message: keep.to_utc("2024-01-01T00:00:00")
to_timestamp
Description: Converts a datetime object or string into a Unix timestamp.
Example:
steps:
- name: example-step
provider:
type: mock
with:
message: keep.to_timestamp("2024-01-01T00:00:00")
datetime_compare
Description: Compares two datetime objects and returns the difference in hours.
Example:
steps:
- name: example-step
provider:
type: mock
with:
message: keep.datetime_compare("2024-01-01T10:00:00", "2024-01-01T00:00:00") # Output: 10.0
is_business_hours
Description: Checks whether a given time falls within business hours.
Example:
steps:
- name: example-step
provider:
type: mock
with:
message: keep.is_business_hours(
time_to_check="2024-01-01T14:00:00Z",
start_hour=8,
end_hour=20,
business_days=[0,1,2,3,4],
timezone="America/New_York"
)
JSON Functions
json_dumps
Description: Converts a dictionary or string into a formatted JSON string.
Example:
steps:
- name: example-step
provider:
type: mock
with:
message: keep.json_dumps({"key": "value"})
json_loads
Description: Parses a JSON string into a dictionary.
Example:
steps:
- name: example-step
provider:
type: mock
with:
message: keep.json_loads('{"key": "value"}')
Utility Functions
get_firing_time
Description: Calculates the firing duration of an alert in specified time units.
Example:
steps:
- name: example-step
provider:
type: mock
with:
message: keep.get_firing_time(alert, "m", tenant_id="tenant-id") # Output: "15.0"
add_time_to_date
Description: Adds time to a date string based on specified time units.
Example:
steps:
- name: example-step
provider:
type: mock
with:
message: keep.add_time_to_date("2024-01-01", "%Y-%m-%d", "1w 2d") # Output: "2024-01-10"
timestamp_delta
Description: Adds or subtracts a time delta to/from a datetime. Use negative values to subtract time.
Example:
steps:
- name: example-step
provider:
type: mock
with:
# Add 2 hours to the current time
add_hours: keep.timestamp_delta(keep.utcnow(), 2, "hours")
# Subtract 30 minutes from a specific datetime
subtract_minutes: keep.timestamp_delta("2024-01-01T12:00:00Z", -30, "minutes") # Output: 2024-01-01T11:30:00Z
# Add 1 week to a datetime
add_week: keep.timestamp_delta("2024-01-01T00:00:00Z", 1, "weeks") # Output: 2024-01-08T00:00:00Z
is_first_time
Description: Checks if an alert with a given fingerprint is firing for the first time or first time within a specified period.
Example:
steps:
- name: example-step
provider:
type: mock
with:
# Check if this is the first time the alert is firing
first_time: keep.is_first_time(alert.fingerprint, tenant_id="tenant-id")
# Check if this is the first time the alert is firing in the last 24 hours
first_time_24h: keep.is_first_time(alert.fingerprint, "24h", tenant_id="tenant-id")
all
Description: Checks if all elements in an iterable are identical.
Example:
steps:
- name: example-step
provider:
type: mock
with:
message: keep.all([1, 1, 1]) # Output: true
diff
Description: Checks if any elements in an iterable are different (opposite of all).
Example:
steps:
- name: example-step
provider:
type: mock
with:
message: keep.diff([1, 2, 1]) # Output: true
