Business Rule Engine

A simple business rule engine made by @hlpy-co.

Contents

• Installation
• Usage

Installation

This package can be installed using pip:

pip install hlpy-business-rule-engine

Usage

This is an example for implementing it inside your application:

from hlpy_business_rule_engine import RuleEngine

engine = RuleEngine()

# To load a folder of .rules files use the method 'load_rules_from_folder'.
engine.add_rules([
    {
        'priority': 1000,
        'name': "is_event_0",
        'conditions': ['field == "value"', 'event == "event_0"'],

        'actions': '''
                    print("is_auction")
                    set_variable("test", "value")
        ''',
    },

    {
        'priority': 1000,
        'name': "is_event_1",
        'conditions': ['field == "value"', 'event == "event_1"'],

        'actions': '''
                    print("Performing action...")
                    set_variable("var", "var_value")
        ''',
    },

    {
        'priority': 100,
        'name': "is_event_1_2",
        'conditions': ['field == "value"', 'event == "event_1"'],

        'actions': '''
                    print("Performing actions for event 1")
                    set_variable("run", "result_run")
        ''',
    },
])

response = engine.process({
    'field': 'value',
    'event': 'event_1',
})

assert response['run'] == 'result_run'
assert response['var'] == 'var_value'