51 lines
1.2 KiB
JavaScript
51 lines
1.2 KiB
JavaScript
"use strict";
|
|
|
|
class GatewayRepo {
|
|
constructor({ database }) {
|
|
this.db = database;
|
|
}
|
|
|
|
add(...gateways) {
|
|
if(typeof this.query_insert == "undefined")
|
|
this.query_insert = this.db.prepare(`INSERT INTO gateways (
|
|
id,
|
|
lat, long,
|
|
altitude
|
|
) VALUES (
|
|
:id,
|
|
:latitude, :longitude,
|
|
:altitude
|
|
)`);
|
|
|
|
for(let gateway of gateways)
|
|
this.insert_query.run(gateway);
|
|
}
|
|
|
|
/**
|
|
* Determines whether a gateway exists in the dayabase with the given name.
|
|
* @param {string} id The id of the gateway.
|
|
* @return {bool} Whether a gateway with the given name exists in the database.
|
|
*/
|
|
exists(id) {
|
|
// Note that normally a count wouldn't be appropriate here just to test for existence, but it's ok because it's guaranteed that there will only ever be a single entry with a given id.
|
|
let statement = this.db.prepare(`SELECT COUNT(id) AS count
|
|
FROM gateways
|
|
WHERE id = :id`);
|
|
|
|
let count = statement.get({ id }).count;
|
|
|
|
return count > 0;
|
|
}
|
|
|
|
/**
|
|
* Iterates over all the gateways in the table.
|
|
* TODO: Use Symbol.iterator here?
|
|
* @return {Generator} A generator that can be used with for..of
|
|
*/
|
|
iterate() {
|
|
return this.db.prepare(`SELECT * FROM gateways`).iterate();
|
|
}
|
|
}
|
|
|
|
export default GatewayRepo;
|