shelving/cloudflare/CloudflareD1Provider.js

Toolkit for using data in JavaScript.

import { SQLiteProvider } from "../db/provider/SQLiteProvider.js";
import { ValueError } from "../error/ValueError.js";
import { isArray } from "../util/array.js";
import { isPlainObject } from "../util/object.js";
/**
 * Cloudflare D1 database provider.
 *
 * Uses the D1 Worker API for execution and standard SQL from `SQLProvider`.
 */
export class CloudflareD1Provider extends SQLiteProvider {
    _db;
    constructor(db) {
        super();
        this._db = db;
    }
    async exec(strings, ...values) {
        const { query, values: bindings } = _getD1Query(strings, values, this.exec);
        const result = await this._db
            .prepare(query)
            .bind(...bindings)
            .run();
        return result.results ?? [];
    }
}
function _getD1Query(strings, values, caller) {
    let query = strings[0] ?? "";
    const bindings = [];
    for (const [index, value] of values.entries()) {
        const part = _getD1Part(value, caller);
        query += part.query;
        bindings.push(...part.values);
        query += strings[index + 1] ?? "";
    }
    return { query, values: bindings };
}
function _getD1Part(value, caller) {
    if (_isSQLQuery(value))
        return _getD1Query(value.strings, value.values, caller);
    return { query: "?", values: [_getD1Value(value, caller)] };
}
function _getD1Value(value, caller) {
    if (value === null || typeof value === "boolean" || typeof value === "string" || typeof value === "number")
        return value;
    if (isArray(value) || isPlainObject(value)) {
        try {
            return JSON.stringify(value);
        }
        catch (cause) {
            throw new ValueError("Cannot convert value to D1 JSON value", { cause, received: value, caller });
        }
    }
    throw new ValueError("Cannot convert value to D1 binding", { received: value, caller });
}
function _isSQLQuery(value) {
    return typeof value === "object" && !!value && "strings" in value && "values" in value;
}