Devcycle To Openfeature Nodejs User Context Transform

Made for

Node.js

Last update

Mar 13, 2025

DevCycle to OpenFeature Node.js - User Context Transform CodeMod

This Codemod updates the DevCycleUser object to an OpenFeature EvaluationContext object:

Replace the DevCycleUser object / types with an EvaluationContext
Rename the user_id field to targetingKey in the EvaluationContext
If the code is using Typescript types where its typed as DevCycleUser, update it to use EvaluationContext from @openfeature/server-sdk.

Before

export interface DevCycleRequest extends Request {
  user: DevCycleUser;
}

const user: DevCycleUser = {
  user_id: "123",
  email: "test@test.com",
  name: "Test User",
  customData: {
    custom_field: "custom_value",
    number_field: 123,
    boolean_field: true,
  },
  privateCustomData: {
    private_field: "private_value",
  },
};

const varValue = devCycleClient.variableValue(
  { user_id: "123" },
  "test-variable",
  "default"
);

const user2 = { user_id: "1234", email: "test@test.com", name: "Test User" };
const boolVarValue = devCycleClient.variable(
  user2,
  "test-boolean-variable",
  false
);

After

export interface DevCycleRequest extends Request {
  user: EvaluationContext;
}

const user: EvaluationContext = {
  targetingKey: "123",
  email: "test@test.com",
  name: "Test User",
  customData: {
    custom_field: "custom_value",
    number_field: 123,
    boolean_field: true,
  },
  privateCustomData: {
    private_field: "private_value",
  },
};

const varValue = devCycleClient.variableValue(
  { targetingKey: "123" },
  "test-variable",
  "default"
);

const user2 = {
  targetingKey: "1234",
  email: "test@test.com",
  name: "Test User",
};
const boolVarValue = devCycleClient.variable(
  user2,
  "test-boolean-variable",
  false
);

DevCycle to OpenFeature Node.js - User Context Transform CodeMod

This Codemod updates the DevCycleUser object to an OpenFeature EvaluationContext object:

Replace the DevCycleUser object / types with an EvaluationContext
Rename the user_id field to targetingKey in the EvaluationContext
If the code is using Typescript types where its typed as DevCycleUser, update it to use EvaluationContext from @openfeature/server-sdk.

Before

export interface DevCycleRequest extends Request {
  user: DevCycleUser;
}

const user: DevCycleUser = {
  user_id: "123",
  email: "test@test.com",
  name: "Test User",
  customData: {
    custom_field: "custom_value",
    number_field: 123,
    boolean_field: true,
  },
  privateCustomData: {
    private_field: "private_value",
  },
};

const varValue = devCycleClient.variableValue(
  { user_id: "123" },
  "test-variable",
  "default"
);

const user2 = { user_id: "1234", email: "test@test.com", name: "Test User" };
const boolVarValue = devCycleClient.variable(
  user2,
  "test-boolean-variable",
  false
);

After

export interface DevCycleRequest extends Request {
  user: EvaluationContext;
}

const user: EvaluationContext = {
  targetingKey: "123",
  email: "test@test.com",
  name: "Test User",
  customData: {
    custom_field: "custom_value",
    number_field: 123,
    boolean_field: true,
  },
  privateCustomData: {
    private_field: "private_value",
  },
};

const varValue = devCycleClient.variableValue(
  { targetingKey: "123" },
  "test-variable",
  "default"
);

const user2 = {
  targetingKey: "1234",
  email: "test@test.com",
  name: "Test User",
};
const boolVarValue = devCycleClient.variable(
  user2,
  "test-boolean-variable",
  false
);

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