unleash-server/dist/migrations/20191023184858-flexible-rollout-strategy.js

Unleash is an enterprise ready feature flag service. It provides different strategies for handling feature flags.

'use strict';
const async = require('async');
const flexibleRollout = require('./flexible-rollout-strategy.json');
function insertStrategySQL(strategy) {
    return `
        INSERT INTO strategies (name, description, parameters, built_in)
        SELECT '${strategy.name}', '${strategy.description}', '${JSON.stringify(strategy.parameters)}', 1
        WHERE
            NOT EXISTS (
                SELECT name FROM strategies WHERE name = '${strategy.name}'
        );`;
}
function insertEventsSQL(strategy) {
    return `
        INSERT INTO events (type, created_by, data)
        SELECT 'strategy-created', 'migration', '${JSON.stringify(strategy)}'
        WHERE
            NOT EXISTS (
                SELECT name FROM strategies WHERE name = '${strategy.name}'
        );`;
}
function removeEventsSQL(strategy) {
    return `
        INSERT INTO events (type, created_by, data)
        SELECT 'strategy-deleted', 'migration', '${JSON.stringify(strategy)}'
        WHERE
            EXISTS (
                SELECT name FROM strategies WHERE name = '${strategy.name}' AND built_in = 1
        );`;
}
function removeStrategySQL(strategy) {
    return `
        DELETE FROM strategies
        WHERE name = '${strategy.name}' AND built_in = 1`;
}
exports.up = function (db, callback) {
    async.series([
        db.runSql.bind(db, insertEventsSQL(flexibleRollout)),
        db.runSql.bind(db, insertStrategySQL(flexibleRollout)),
    ], callback);
};
exports.down = function (db, callback) {
    async.series([
        db.runSql.bind(db, removeEventsSQL(flexibleRollout)),
        db.runSql.bind(db, removeStrategySQL(flexibleRollout)),
    ], callback);
};
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