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Matthias Damm
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Nov 5, 2021
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Original file line number | Diff line number | Diff line change |
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@@ -1,116 +1,139 @@ | ||
const { Client } = require('pg') | ||
const { readConfigurationFromFile } = require('./util-file') | ||
const { Client } = require('pg'); | ||
const { readConfigurationFromFile } = require('./util-file'); | ||
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const createConfigurationIfNotExists = () => { | ||
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hasConfiguration((error) => { | ||
if (error) { | ||
const client = createClient() | ||
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client.connect().then(() => { | ||
return createTableIfNotExists(client) | ||
}).then((result) => { | ||
return truncateTable(client) | ||
}).then((result) => { | ||
return readConfigurationFromFile() | ||
}).then((configurationAsString) => { | ||
return writeConfiguration(client, configurationAsString) | ||
}).then((result) => { | ||
console.log('table successfully created, configuration saved') | ||
process.exit(0) | ||
}).catch((error) => { | ||
console.log(error) | ||
process.exit(1) | ||
}).then(() => client.end()) | ||
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} | ||
}) | ||
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} | ||
hasConfiguration((error) => { | ||
if (error) { | ||
const client = createClient(); | ||
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client | ||
.connect() | ||
.then(() => { | ||
return createTableIfNotExists(client); | ||
}) | ||
.then((result) => { | ||
return truncateTable(client); | ||
}) | ||
.then((result) => { | ||
return readConfigurationFromFile(); | ||
}) | ||
.then((configurationAsString) => { | ||
return writeConfiguration(client, configurationAsString); | ||
}) | ||
.then((result) => { | ||
console.log('table successfully created, configuration saved'); | ||
process.exit(0); | ||
}) | ||
.catch((error) => { | ||
console.log(error); | ||
process.exit(1); | ||
}) | ||
.then(() => client.end()); | ||
} | ||
}); | ||
}; | ||
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const hasConfiguration = (callback) => { | ||
const client = createClient() | ||
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client.connect().then(() => { | ||
return checkIfTableExists(client) | ||
}).then((result) => { | ||
if (result.rows[0].exists === true) { | ||
callback(null) | ||
} else { | ||
callback(new Error('table does not exist')) | ||
} | ||
}).catch((error) => { | ||
return callback(error) | ||
}).then(() => client.end()) | ||
} | ||
const client = createClient(); | ||
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client | ||
.connect() | ||
.then(() => { | ||
return checkIfTableExists(client); | ||
}) | ||
.then((result) => { | ||
if (result.rows[0].exists === true) { | ||
callback(null); | ||
} else { | ||
callback(new Error('table does not exist')); | ||
} | ||
}) | ||
.catch((error) => { | ||
return callback(error); | ||
}) | ||
.then(() => client.end()); | ||
}; | ||
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const getConfiguration = (callback) => { | ||
const client = createClient() | ||
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client.connect().then(() => { | ||
return readConfiguration(client) | ||
}).then((result) => { | ||
if (result.rows.length === 1) { | ||
callback(null, JSON.parse(result.rows[0].data)) | ||
} else { | ||
callback(new Error(`configuration invalid, ${result.rows.length} rows found`)) | ||
} | ||
}).catch((error) => { | ||
return callback(error) | ||
}).then(() => client.end()) | ||
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} | ||
const client = createClient(); | ||
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client | ||
.connect() | ||
.then(() => { | ||
return readConfiguration(client); | ||
}) | ||
.then((result) => { | ||
if (result.rows.length === 1) { | ||
callback(null, JSON.parse(result.rows[0].data)); | ||
} else { | ||
callback(new Error(`configuration invalid, ${result.rows.length} rows found`)); | ||
} | ||
}) | ||
.catch((error) => { | ||
return callback(error); | ||
}) | ||
.then(() => client.end()); | ||
}; | ||
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const setConfiguration = (configuration, callback) => { | ||
const configurationAsString = JSON.stringify(configuration, null, 4) | ||
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const client = createClient() | ||
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client.connect().then(() => { | ||
return truncateTable(client) | ||
}).then((result) => { | ||
return writeConfiguration(client, configurationAsString) | ||
}).then((result) => { | ||
return callback(null) | ||
}).catch((error) => { | ||
console.log(error) | ||
return callback(error) | ||
}).then(() => client.end()) | ||
} | ||
const configurationAsString = JSON.stringify(configuration, null, 4); | ||
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const client = createClient(); | ||
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client | ||
.connect() | ||
.then(() => { | ||
return truncateTable(client); | ||
}) | ||
.then((result) => { | ||
return writeConfiguration(client, configurationAsString); | ||
}) | ||
.then((result) => { | ||
return callback(null); | ||
}) | ||
.catch((error) => { | ||
console.log(error); | ||
return callback(error); | ||
}) | ||
.then(() => client.end()); | ||
}; | ||
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const createClient = () => { | ||
return new Client({ | ||
connectionString: process.env.DATABASE_URL, | ||
}) | ||
} | ||
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const checkIfTableExists = (client) => { | ||
return client.query('SELECT EXISTS (SELECT 1 FROM information_schema.tables WHERE table_schema = \'public\' AND table_name = \'configuration\')') | ||
} | ||
return new Client({ | ||
connectionString: process.env.DATABASE_URL, | ||
ssl: { rejectUnauthorized: false } | ||
}); | ||
}; | ||
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const checkIfTableExists = (client) => { | ||
return client.query( | ||
"SELECT EXISTS (SELECT 1 FROM information_schema.tables WHERE table_schema = 'public' AND table_name = 'configuration')" | ||
); | ||
}; | ||
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const createTableIfNotExists = (client) => { | ||
return client.query('CREATE TABLE IF NOT EXISTS configuration (id serial, data text)') | ||
} | ||
return client.query('CREATE TABLE IF NOT EXISTS configuration (id serial, data text)'); | ||
}; | ||
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const truncateTable = (client) => { | ||
return client.query('TRUNCATE configuration') | ||
} | ||
return client.query('TRUNCATE configuration'); | ||
}; | ||
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const writeConfiguration = (client, configuration) => { | ||
const query = { | ||
text: 'INSERT INTO configuration(data) values($1)', | ||
values: [configuration], | ||
} | ||
const query = { | ||
text: 'INSERT INTO configuration(data) values($1)', | ||
values: [configuration] | ||
}; | ||
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return client.query(query) | ||
} | ||
return client.query(query); | ||
}; | ||
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const readConfiguration = (client) => { | ||
return client.query('SELECT * FROM configuration') | ||
} | ||
return client.query('SELECT * FROM configuration'); | ||
}; | ||
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module.exports = { | ||
createConfigurationIfNotExists, | ||
getConfiguration, | ||
setConfiguration | ||
} | ||
createConfigurationIfNotExists, | ||
getConfiguration, | ||
setConfiguration | ||
}; |
9b7192d
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great, thanks!