itsHabib / ffts

Feature flag manager in typescript. Used only to learn about the typescript language

FFTS

Feature flag manager written in Typescript. Primary purpose was to help me become familiar with TS.

Concept

A user creates a feature flag with a name and default value. Within a feature flag are rule blocks. Each rule block holds rules that are unique by the combination of primary + secondary tags. Within a rule block are rule chains that describe the various rules related to the set of tags for the block. As an example, the below rule chain describes a rule in which both the 'env' tag has to equal the value 'dev' and the 'org' tag must start with 'internal'.

const rc: RuleChain = {
  PrimaryRule: {
    tag: {
      name: 'env',
      value: 'dev',
    },
    ruleOp: RuleOp.EQUALS,
  },
  SecondaryRule: {
    tag: {
      name: 'org',
      value: 'internal',
    },
    ruleOp: RuleOp.STARTS_WITH,
  },
  ChainOp: RuleChainOp.AND,
};