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Add a simple postgresql storage provider (#350)
* Add a simple postgresql storage provider * Fix queries * Add unit test * Run postgres containers concurrently * Log postgres for debugging workflow * Adjust timeouts * Upgrade dependencies? * Adjust timeouts again
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,168 @@ | ||
| import * as postgres from "postgres"; | ||
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| import { IStorageProvider } from "./IStorageProvider"; | ||
| import { IAppserviceStorageProvider } from "./IAppserviceStorageProvider"; | ||
| import { IFilterInfo } from "../IFilter"; | ||
|
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| /** | ||
| * A barebones postgresql storage provider. It is not efficient, but it does work. | ||
| * @category Storage providers | ||
| */ | ||
| export class SimplePostgresStorageProvider implements IStorageProvider, IAppserviceStorageProvider { | ||
| private readonly db: postgres.Sql; | ||
| private readonly waitPromise: Promise<void>; | ||
| private completedTransactions = []; | ||
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| /** | ||
| * Creates a new simple postgresql storage provider. | ||
| * @param connectionString The `postgres://` connection string to use. | ||
| * @param trackTransactionsInMemory True (default) to track all received appservice transactions rather than on disk. | ||
| * @param maxInMemoryTransactions The maximum number of transactions to hold in memory before rotating the oldest out. Defaults to 20. | ||
| */ | ||
| constructor(connectionString: string, private trackTransactionsInMemory = true, private maxInMemoryTransactions = 20) { | ||
| this.db = postgres(connectionString); | ||
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| this.waitPromise = Promise.all([ | ||
| this.db` | ||
| CREATE TABLE IF NOT EXISTS bot_metadata (key TEXT NOT NULL PRIMARY KEY, value TEXT); | ||
| `, | ||
| this.db` | ||
| CREATE TABLE IF NOT EXISTS bot_kv (key TEXT NOT NULL PRIMARY KEY, value TEXT); | ||
| `, | ||
| this.db` | ||
| CREATE TABLE IF NOT EXISTS appservice_users (user_id TEXT NOT NULL PRIMARY KEY, registered BOOLEAN NOT NULL); | ||
| `, | ||
| this.db` | ||
| CREATE TABLE IF NOT EXISTS appservice_transactions (txn_id TEXT NOT NULL PRIMARY KEY, completed BOOLEAN NOT NULL); | ||
| `, | ||
| ]).then(); | ||
| } | ||
|
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| public async setSyncToken(token: string | null): Promise<any> { | ||
| await this.waitPromise; | ||
| return this.db` | ||
| INSERT INTO bot_metadata (key, value) VALUES ('syncToken', ${token}) | ||
| ON CONFLICT (key) DO UPDATE SET value = ${token}; | ||
| `; | ||
| } | ||
|
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| public async getSyncToken(): Promise<string | null> { | ||
| await this.waitPromise; | ||
| return (await this.db` | ||
| SELECT value FROM bot_metadata WHERE key = 'syncToken'; | ||
| `)[0]?.value; | ||
| } | ||
|
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| public async setFilter(filter: IFilterInfo): Promise<any> { | ||
| await this.waitPromise; | ||
| const filterStr = filter ? JSON.stringify(filter) : null; | ||
| return this.db` | ||
| INSERT INTO bot_metadata (key, value) VALUES ('filter', ${filterStr}) | ||
| ON CONFLICT (key) DO UPDATE SET value = ${filterStr}; | ||
| `; | ||
| } | ||
|
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| public async getFilter(): Promise<IFilterInfo> { | ||
| await this.waitPromise; | ||
| const value = (await this.db` | ||
| SELECT value FROM bot_metadata WHERE key = 'filter'; | ||
| `)[0]?.value; | ||
| return typeof value === "string" ? JSON.parse(value) : value; | ||
| } | ||
|
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| public async addRegisteredUser(userId: string): Promise<any> { | ||
| await this.waitPromise; | ||
| return this.db` | ||
| INSERT INTO appservice_users (user_id, registered) VALUES (${userId}, TRUE) | ||
| ON CONFLICT (user_id) DO UPDATE SET registered = TRUE; | ||
| `; | ||
| } | ||
|
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| public async isUserRegistered(userId: string): Promise<boolean> { | ||
| await this.waitPromise; | ||
| return !!(await this.db` | ||
| SELECT registered FROM appservice_users WHERE user_id = ${userId}; | ||
| `)[0]?.registered; | ||
| } | ||
|
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| public async setTransactionCompleted(transactionId: string): Promise<any> { | ||
| await this.waitPromise; | ||
| if (this.trackTransactionsInMemory) { | ||
| if (this.completedTransactions.indexOf(transactionId) === -1) { | ||
| this.completedTransactions.push(transactionId); | ||
| } | ||
| if (this.completedTransactions.length > this.maxInMemoryTransactions) { | ||
| this.completedTransactions = this.completedTransactions.reverse().slice(0, this.maxInMemoryTransactions).reverse(); | ||
| } | ||
| return; | ||
| } | ||
|
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| return this.db` | ||
| INSERT INTO appservice_transactions (txn_id, completed) VALUES (${transactionId}, TRUE) | ||
| ON CONFLICT (txn_id) DO UPDATE SET completed = TRUE; | ||
| `; | ||
| } | ||
|
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| public async isTransactionCompleted(transactionId: string): Promise<boolean> { | ||
| await this.waitPromise; | ||
| if (this.trackTransactionsInMemory) { | ||
| return this.completedTransactions.includes(transactionId); | ||
| } | ||
|
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| return (await this.db` | ||
| SELECT completed FROM appservice_transactions WHERE txn_id = ${transactionId}; | ||
| `)[0]?.completed; | ||
| } | ||
|
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| public async readValue(key: string): Promise<string | null | undefined> { | ||
| await this.waitPromise; | ||
| return (await this.db` | ||
| SELECT value FROM bot_kv WHERE key = ${key}; | ||
| `)[0]?.value; | ||
| } | ||
|
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| public async storeValue(key: string, value: string): Promise<void> { | ||
| await this.waitPromise; | ||
| return this.db` | ||
| INSERT INTO bot_kv (key, value) VALUES (${key}, ${value}) | ||
| ON CONFLICT (key) DO UPDATE SET value = ${value}; | ||
| `.then(); | ||
| } | ||
|
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| public storageForUser(userId: string): IStorageProvider { | ||
| return new NamespacedPostgresProvider(userId, this); | ||
| } | ||
| } | ||
|
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| /** | ||
| * A namespaced storage provider that uses postgres to store information. | ||
| * @category Storage providers | ||
| */ | ||
| class NamespacedPostgresProvider implements IStorageProvider { | ||
| constructor(private prefix: string, private parent: SimplePostgresStorageProvider) { | ||
| } | ||
|
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| public setFilter(filter: IFilterInfo): Promise<any> | void { | ||
| return this.parent.storeValue(`${this.prefix}_internal_filter`, JSON.stringify(filter)); | ||
| } | ||
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| public async getFilter(): Promise<IFilterInfo> { | ||
| return this.parent.readValue(`${this.prefix}_internal_filter`).then(r => r ? JSON.parse(r) : r); | ||
| } | ||
|
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| public setSyncToken(token: string | null): Promise<any> | void { | ||
| return this.parent.storeValue(`${this.prefix}_internal_syncToken`, token ?? ""); | ||
| } | ||
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| public async getSyncToken(): Promise<string> { | ||
| return this.parent.readValue(`${this.prefix}_internal_syncToken`).then(r => r === "" ? null : r); | ||
| } | ||
|
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| public storeValue(key: string, value: string): Promise<any> | void { | ||
| return this.parent.storeValue(`${this.prefix}_internal_kv_${key}`, value); | ||
| } | ||
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| public readValue(key: string): string | Promise<string | null | undefined> | null | undefined { | ||
| return this.parent.readValue(`${this.prefix}_internal_kv_${key}`); | ||
| } | ||
| } |
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