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const mssql = require('mssql');
const { apiAuthorizer } = require('wingbot');
const CONFIG_ID = 'config';
/**
* Storage for wingbot.ai conversation config
*
* @class
*/
class BotConfigStorage {
/**
*
* @param {Promise<mssql.ConnectionPool>} pool
*/
constructor (pool) {
this._pool = pool;
}
/**
* @param {object} newConfig
*/
async _simpleUpdate (newConfig) {
const cp = await this._pool;
const r = cp.request();
const res = await r
.input('CONFIG_ID', mssql.VarChar, CONFIG_ID)
.input('blocks', mssql.Text, Buffer.from(JSON.stringify(newConfig.blocks)).toString('base64'))
.input('timestamp', mssql.BigInt, newConfig.timestamp)
.query('UPDATE botConfigStorage SET timestamp = @timestamp, blocks = @blocks WHERE id = @CONFIG_ID');
return res.rowsAffected[0] === 1;
}
/**
* Returns botUpdate API for wingbot
*
* @param {Function} [onUpdate] - async update handler function
* @param {Function|string[]} [acl] - acl configuration
* @returns {{updateBot:Function}}
*/
api (onUpdate = () => Promise.resolve(), acl) {
const storage = this;
return {
async updateBot (args, ctx) {
if (!apiAuthorizer(args, ctx, acl)) {
return null;
}
await storage.invalidateConfig();
await onUpdate();
return true;
}
};
}
/**
* Invalidates current configuration
*
* @returns {Promise}
*/
async invalidateConfig () {
const cp = await this._pool;
const r = cp.request();
return r
.input('CONFIG_ID', mssql.VarChar, CONFIG_ID)
.query('DELETE FROM botConfigStorage WHERE botConfigStorage.id=@CONFIG_ID');
}
/**
* @returns {Promise<number>}
*/
async getConfigTimestamp () {
const cp = await this._pool;
const r = cp.request();
const { recordset } = await r
.input('CONFIG_ID', mssql.VarChar, CONFIG_ID)
.query('SELECT timestamp FROM botConfigStorage WHERE botConfigStorage.id=@CONFIG_ID');
const [res] = recordset;
return res ? Number(res.timestamp) : 0;
}
/**
* @template T
* @param {T} newConfig
* @returns {Promise<T>}
*/
async updateConfig (newConfig) {
Object.assign(newConfig, { timestamp: Date.now() });
const cp = await this._pool;
const r = cp.request();
const up = await this._simpleUpdate(newConfig);
if (!up) {
try {
await r
.input('CONFIG_ID', mssql.VarChar, CONFIG_ID)
// @ts-ignore
.input('blocks', mssql.Text, Buffer.from(JSON.stringify(newConfig.blocks)).toString('base64'))
// @ts-ignore
.input('timestamp', mssql.BigInt, newConfig.timestamp)
.query('INSERT INTO botConfigStorage (id, blocks, timestamp) VALUES (@CONFIG_ID, @blocks, @timestamp);');
} catch (e) {
// 2627 is unique constraint (includes primary key), 2601 is unique index
if (e.number === 2601 || e.number === 2627) {
await this._simpleUpdate(newConfig);
} else {
throw e;
}
}
}
return newConfig;
}
/**
* @returns {Promise<object|null>}
*/
async getConfig () {
const cp = await this._pool;
const r = cp.request();
const { recordset } = await r
.input('CONFIG_ID', mssql.VarChar, CONFIG_ID)
.query('SELECT blocks, timestamp FROM botConfigStorage WHERE botConfigStorage.id=@CONFIG_ID');
const [res] = recordset;
// if (res) {
// const q = res.blocks.substring(1520, 1590);
// console.log(q);
// }
if (res) {
try {
const ret = {
blocks: JSON.parse(Buffer.from(res.blocks, 'base64').toString('utf8')),
timestamp: Number(res.timestamp)
};
return ret;
} catch (e) {
return null;
}
}
return null;
}
}
module.exports = BotConfigStorage;
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