started mongo stuff, but it's a PITA. fuck mongo

parts/3/phonebookBackend/node_modules/bson/src/error.ts

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+import { BSON_MAJOR_VERSION } from './constants';
+
+/**
+ * @public
+ * @category Error
+ *
+ * `BSONError` objects are thrown when BSON encounters an error.
+ *
+ * This is the parent class for all the other errors thrown by this library.
+ */
+export class BSONError extends Error {
+  /**
+   * @internal
+   * The underlying algorithm for isBSONError may change to improve how strict it is
+   * about determining if an input is a BSONError. But it must remain backwards compatible
+   * with previous minors & patches of the current major version.
+   */
+  protected get bsonError(): true {
+    return true;
+  }
+
+  override get name(): string {
+    return 'BSONError';
+  }
+
+  constructor(message: string, options?: { cause?: unknown }) {
+    super(message, options);
+  }
+
+  /**
+   * @public
+   *
+   * All errors thrown from the BSON library inherit from `BSONError`.
+   * This method can assist with determining if an error originates from the BSON library
+   * even if it does not pass an `instanceof` check against this class' constructor.
+   *
+   * @param value - any javascript value that needs type checking
+   */
+  public static isBSONError(value: unknown): value is BSONError {
+    return (
+      value != null &&
+      typeof value === 'object' &&
+      'bsonError' in value &&
+      value.bsonError === true &&
+      // Do not access the following properties, just check existence
+      'name' in value &&
+      'message' in value &&
+      'stack' in value
+    );
+  }
+}
+
+/**
+ * @public
+ * @category Error
+ */
+export class BSONVersionError extends BSONError {
+  get name(): 'BSONVersionError' {
+    return 'BSONVersionError';
+  }
+
+  constructor() {
+    super(`Unsupported BSON version, bson types must be from bson ${BSON_MAJOR_VERSION}.x.x`);
+  }
+}
+
+/**
+ * @public
+ * @category Error
+ *
+ * An error generated when BSON functions encounter an unexpected input
+ * or reaches an unexpected/invalid internal state
+ *
+ */
+export class BSONRuntimeError extends BSONError {
+  get name(): 'BSONRuntimeError' {
+    return 'BSONRuntimeError';
+  }
+
+  constructor(message: string) {
+    super(message);
+  }
+}
+
+/**
+ * @public
+ * @category Error
+ *
+ * @experimental
+ *
+ * An error generated when BSON bytes are invalid.
+ * Reports the offset the parser was able to reach before encountering the error.
+ */
+export class BSONOffsetError extends BSONError {
+  public get name(): 'BSONOffsetError' {
+    return 'BSONOffsetError';
+  }
+
+  public offset: number;
+
+  constructor(message: string, offset: number, options?: { cause?: unknown }) {
+    super(`${message}. offset: ${offset}`, options);
+    this.offset = offset;
+  }
+}