unleash.unleash/src/migrations/20230420125500-v5-strategy-changes.js

'use strict';

exports.up = function (db, callback) {
    db.runSql(
        `
        -- delete deprecated strategies still present in v4
        delete from strategies 
            where name in ('gradualRolloutUserId', 'gradualRolloutRandom', 'gradualRolloutSessionId') 
            and deprecated 
            and not exists (select * from feature_strategies where strategy_name = name limit 1);
        
        -- deprecate strategies on v5
        update strategies set deprecated = true where name in ('userWithId');
        
        -- update strategy descriptions and sort order
        update strategies set sort_order = 1, description = 'This strategy turns on / off for your entire userbase. Prefer using "Gradual rollout" strategy (100%=on, 0%=off).' WHERE name = 'default';
        update strategies set sort_order = 0 WHERE name = 'flexibleRollout';
        update strategies set description = 'Enable the feature for a specific set of userIds. Prefer using "Gradual rollout" strategy with user id constraints.' WHERE name = 'userWithId';
        `,
        callback,
    );
};

exports.down = function (db, callback) {
    db.runSql(
        `
        -- restore deleted strategies
        insert into strategies (name, description, parameters, deprecated, sort_order) values
            ('gradualRolloutRandom', 'Randomly activate the feature toggle. No stickiness.', [
                {
                  "name": "percentage",
                  "type": "percentage",
                  "description": "",
                  "required": false
                }
              ], true, 3),
            ('gradualRolloutSessionId', 'Gradually activate feature toggle. Stickiness based on session id.', [
                {
                  "name": "percentage",
                  "type": "percentage",
                  "description": "",
                  "required": false
                },
                {
                  "name": "groupId",
                  "type": "string",
                  "description": "Used to define a activation groups, which allows you to correlate across feature toggles.",
                  "required": true
                }
              ], true, 4),
            ('gradualRolloutUserId', 'Gradually activate feature toggle for logged in users. Stickiness based on user id.', [
                {
                  "name": "percentage",
                  "type": "percentage",
                  "description": "",
                  "required": false
                },
                {
                  "name": "groupId",
                  "type": "string",
                  "description": "Used to define a activation groups, which allows you to correlate across feature toggles.",
                  "required": true
                }
              ], true, 5);

        -- revert sort order
        update strategies set sort_order = 0 WHERE name = 'default';
        update strategies set sort_order = 1 WHERE name = 'flexibleRollout';
        `,
        callback,
    );
};