unleash-server
Version:
Unleash is an enterprise ready feature flag service. It provides different strategies for handling feature flags.
56 lines • 1.97 kB
JavaScript
;
const async = require('async');
const strategies = require('./default-strategies.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) {
const insertStrategies = strategies.map((s) => (cb) => {
async.series([
db.runSql.bind(db, insertEventsSQL(s)),
db.runSql.bind(db, insertStrategySQL(s)),
], cb);
});
async.series(insertStrategies, callback);
};
exports.down = function (db, callback) {
const removeStrategies = strategies
.filter((s) => s.name !== 'default')
.map((s) => (cb) => {
async.series([
db.runSql.bind(db, removeEventsSQL(s)),
db.runSql.bind(db, removeStrategySQL(s)),
], cb);
});
async.series(removeStrategies, callback);
};
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