ls-deno/db/mod.ts

import {
  Pool,
  PostgresError,
} from "https://deno.land/x/postgres@v0.16.1/mod.ts";
import {
  type QueryArguments,
  type QueryArrayResult,
  type QueryObjectResult,
} from "https://deno.land/x/postgres@v0.16.1/query/query.ts?s=QueryArguments";
import { config } from "@/config.ts";

import { type Note } from "@/types.ts";

export { PostgresError };
export { type QueryObjectResult };

const pool = new Pool(config.postgres.url, 3, true);

export async function queryObject<T>(
  sql: string,
  args: QueryArguments[],
): Promise<QueryObjectResult<T> | null> {
  let result = null;
  try {
    const connection = await pool.connect();
    try {
      result = await connection.queryObject<T>({
        camelcase: true,
        text: sql,
        args,
      });
    } catch (err) {
      console.error("Error querying database:", { ...err });
    } finally {
      connection.release();
    }
  } catch (err) {
    console.error("Error connecting to database:", err);
  }
  return result;
}

export async function queryArray<T extends unknown>(
  sql: string,
  args: QueryArguments[],
): Promise<QueryArrayResult<T[]> | null> {
  let result = null;
  try {
    const connection = await pool.connect();
    try {
      result = await connection.queryArray<T[]>({
        text: sql,
        args,
      });
    } catch (err) {
      console.error("Error querying database:", { ...err });
    } finally {
      connection.release();
    }
  } catch (err) {
    console.error("Error connecting to database:", err);
  }
  return result;
}

export async function listNotes() {
  return await queryObject<Note>(
    "select * from note order by created_at desc",
  );
}

export async function getNote(id: string | { id: string }) {
  const idVal = typeof id == "object" ? id.id : id;
  console.debug("getNote id =", JSON.stringify(idVal));
  return await queryObject<Note>(
    "select * from note where id = $1",
    [idVal],
  );
}

export async function createNote({ content }: Omit<Note, "id" | "createdAt">) {
  return await queryObject<Note>(
    "insert into note (content) values ($1) returning *",
    [content],
  );
}