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db-versioner.ts
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db-versioner.ts
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import { Collection, Db } from "mongodb";
import { IDBVersion, IDBVersionerArgs } from "./types";
import { COLL_NAMES, VERSION_TYPES } from "../mongo-adapter/constants";
import { TLogger } from "../../campaign/types";
export class DBVersioner {
curDbVersion ?: string;
contractsVersion : string;
archiveCurrentDeployed : boolean;
logger : TLogger;
// Collection pointer
versions : Collection<IDBVersion>;
constructor ({
dbVersion,
contractsVersion,
archive,
logger,
} : IDBVersionerArgs) {
if (!contractsVersion) {
logger.info("No contracts version/tag provided to MongoDBAdapter! Only the DB version will be written.");
this.contractsVersion = "0";
} else {
this.contractsVersion = contractsVersion;
}
this.curDbVersion = dbVersion;
this.archiveCurrentDeployed = !!archive;
this.logger = logger;
this.versions = {} as Collection<IDBVersion>;
}
async configureVersioning (db : Db) {
this.versions = db.collection(COLL_NAMES.versions);
const tempV = await this.getTempVersion();
const deployedV = await this.getDeployedVersion();
let finalVersion : string;
if (this.curDbVersion) {
finalVersion = this.curDbVersion;
if (!deployedV || this.curDbVersion !== deployedV.dbVersion) {
// we should only have a single TEMP version at any given time
if (tempV && this.curDbVersion !== tempV.dbVersion) {
this.logger.debug("Clearing existing TEMP DB version...");
await this.clearDBForVersion(tempV.dbVersion, db);
}
this.logger.debug(`Updating TEMP version for the new one: ${finalVersion}`);
await this.createUpdateTempVersion(finalVersion);
} else {
this.logger.debug(`Using existing DEPLOYED DB version: ${finalVersion}`);
}
} else {
if (!tempV) {
// what to do with the current DEPLOYED version
if (this.archiveCurrentDeployed) {
this.logger.debug("Archiving enabled - Archiving current DEPLOYED DB version...");
// archive the current DEPLOYED version
await this.versions.updateOne(
{
type: VERSION_TYPES.deployed,
},
{
$set: {
type: VERSION_TYPES.archived,
},
});
} else {
if (deployedV) {
// get the current DEPLOYED and clear DB for that version
this.logger.debug("Archiving disabled - Clearing current DEPLOYED DB version...");
await this.clearDBForVersion(deployedV.dbVersion, db);
}
}
// create new TEMP version
finalVersion = Date.now().toString();
// eslint-disable-next-line max-len
this.logger.info(`No version provided to MongoDBAdapter, using current timestamp as new TEMP version: ${finalVersion}`);
await this.createUpdateTempVersion(finalVersion);
} else {
finalVersion = tempV.dbVersion;
this.logger.info(`Using existing MongoDB TEMP version: ${finalVersion}`);
}
}
this.curDbVersion = finalVersion;
return this.curDbVersion;
}
async finalizeDeployedVersion (version ?: string) {
const finalV = version || (await this.getTempVersion())?.dbVersion;
if (!finalV) return;
const deployedV = (await this.getDeployedVersion())?.dbVersion;
if (finalV !== deployedV) {
// archive the current DEPLOYED version
await this.versions.updateOne(
{
type: VERSION_TYPES.deployed,
},
{
$set: {
type: VERSION_TYPES.archived,
},
});
// create new DEPLOYED version
await this.versions.insertOne({
type: VERSION_TYPES.deployed,
dbVersion: finalV,
contractsVersion: this.contractsVersion,
});
// now remove the TEMP version
await this.versions.deleteOne({
type: VERSION_TYPES.temp,
dbVersion: finalV,
});
}
// archive the current TEMP version if any
await this.versions.updateOne(
{
type: VERSION_TYPES.temp,
},
{
$set: {
type: VERSION_TYPES.archived,
},
});
this.logger.info(`Successfully finalized DB version ${finalV} from TEMP to DEPLOYED.`);
}
async getCheckLatestVersion () {
const v = await this.getLatestVersion();
if (!v) throw new Error("No version found in DB!");
return v;
}
async getTempVersion () : Promise<IDBVersion | null> {
const v = await this.versions.findOne({
type: VERSION_TYPES.temp,
});
if (!v) return null;
return v;
}
async getDeployedVersion () : Promise<IDBVersion | null> {
const v = await this.versions.findOne({
type: VERSION_TYPES.deployed,
});
if (!v) return null;
return v;
}
async getLatestVersion () : Promise<IDBVersion | null> {
const v = await this.getTempVersion();
if (v) return v;
return this.getDeployedVersion();
}
async createUpdateTempVersion (version : string) {
return this.versions.updateOne({
type: VERSION_TYPES.temp,
}, {
$set: {
dbVersion: version,
contractsVersion: this.contractsVersion,
},
}, {
upsert: true,
});
}
async clearDBForVersion (version : string, db ?: Db) {
if (db) {
const contracts = db.collection(COLL_NAMES.contracts);
await contracts.deleteMany({
version,
});
}
return this.versions.deleteMany({
dbVersion: version,
});
}
}