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verdict.js

1.0.0 • Public • Published

verdict.js

Javascript condition evaluator.

Rewritten from the ground up from the original verdict, cleaner interface inspired from ruler by Garrett Johnson. Adds nesting and "any" vs "all" composite capabilities. Browser-friendly. The segmentation tree capabilities have been dropped and may be available in a separate module with this as a dependency, but are not baked in. For now.

Installation


npm install verdict.js

Usage

There are two main ways to use verdict. The first is a fluent interface:

 
var assert = require('assert');
var verdict = require('verdict');
var res = verdict()
  .eq('a', '1')
  .eq('b', '2')
  .test({ a: '1', b: '2' });
assert(res, true);
 

Rulesets are implicitly assumed to use the "all" composite handler, aka all must be true. That's easy to change:

 
var res = verdict()
  .any()
  .eq('a', '1')
  .eq('b', 'not correct')
  .test({ a: '1', b: '2' });
assert(res, true);
 

You can also make more complex, nested rulesets as necessary:

 
var res = verdict()
  .all(
    verdict().any()
      .eq('a', '1')
      .eq('b', 'not correct, but that is okay, it is an "any"'),
    verdict().all()
      .eq('c', '3')
      .eq('d', '4')
  )
  .test({ a: '1', b: '2', c: '3', d: '4' });
  assert(res, true);
 

The second way to use verdict is to pass a plain javascript object, and you will receive a valid ruleset object back:

 
var ruleset = verdict()
  .parse({
    composite: 'all',
    rules: [
      {
        composite: 'any',
        rules: [
          {
            path: 'a',
            comparator: 'eq',
            value: '1'
          },
          {
            path: 'b',
            comparator: 'eq',
            value: '2'
          }
        ]
      },
      {
        path: 'c',
        comparator: 'eq',
        value: '3'
      }
    ]
  });
 

See test/**/*.js for more examples, and see lib/comparison/index.js for all available comparison functions.

License

MIT license, do very bad things

Readme

Keywords

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Install

npm i verdict.js

Repository

github.com/rfink/verdict.js

Homepage

github.com/rfink/verdict.js

Weekly Downloads

156

Version

1.0.0

License

MIT

Last publish

Collaborators

  • rfink
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