53 lines
1.3 KiB
JavaScript
53 lines
1.3 KiB
JavaScript
"use strict";
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class GatewayRepo {
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constructor({ database }) {
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this.db = database;
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}
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add(...gateways) {
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const statement = this.db.prepare(`INSERT INTO gateways (
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id,
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latitude, longitude,
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altitude
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) VALUES (
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:id,
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:latitude, :longitude,
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:altitude
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)`);
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for(let gateway of gateways)
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statement.run(gateway);
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}
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/**
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* Determines whether a gateway exists in the dayabase with the given name.
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* @param {string} id The id of the gateway.
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* @return {bool} Whether a gateway with the given name exists in the database.
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*/
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exists(id) {
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// 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.
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let statement = this.db.prepare(`SELECT COUNT(id) AS count
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FROM gateways
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WHERE id = :id`);
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let count = statement.get({ id }).count;
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return count > 0;
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}
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get_by_id(id) {
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return this.db.prepare(`SELECT * FROM gateways WHERE id = :id`).get({ id });
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}
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/**
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* Iterates over all the gateways in the table.
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* TODO: Use Symbol.iterator here?
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* @return {Generator} A generator that can be used with for..of
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*/
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iterate() {
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return this.db.prepare(`SELECT * FROM gateways`).iterate();
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}
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}
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export default GatewayRepo;
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