routie dev init since i didn't adhere to any proper guidance up until now

frontend/node_modules/@apidevtools/json-schema-ref-parser/lib/pointer.ts

@@ -0,0 +1,346 @@
+import type { ParserOptions } from "./options.js";
+
+import $Ref from "./ref.js";
+import * as url from "./util/url.js";
+import { JSONParserError, InvalidPointerError, MissingPointerError, isHandledError } from "./util/errors.js";
+import type { JSONSchema } from "./types";
+
+export const nullSymbol = Symbol("null");
+
+const slashes = /\//g;
+const tildes = /~/g;
+const escapedSlash = /~1/g;
+const escapedTilde = /~0/g;
+
+const safeDecodeURIComponent = (encodedURIComponent: string): string => {
+  try {
+    return decodeURIComponent(encodedURIComponent);
+  } catch {
+    return encodedURIComponent;
+  }
+};
+
+/**
+ * This class represents a single JSON pointer and its resolved value.
+ *
+ * @param $ref
+ * @param path
+ * @param [friendlyPath] - The original user-specified path (used for error messages)
+ * @class
+ */
+class Pointer<S extends object = JSONSchema, O extends ParserOptions<S> = ParserOptions<S>> {
+  /**
+   * The {@link $Ref} object that contains this {@link Pointer} object.
+   */
+  $ref: $Ref<S, O>;
+
+  /**
+   * The file path or URL, containing the JSON pointer in the hash.
+   * This path is relative to the path of the main JSON schema file.
+   */
+  path: string;
+
+  /**
+   * The original path or URL, used for error messages.
+   */
+  originalPath: string;
+
+  /**
+   * The value of the JSON pointer.
+   * Can be any JSON type, not just objects. Unknown file types are represented as Buffers (byte arrays).
+   */
+
+  value: any;
+  /**
+   * Indicates whether the pointer references itself.
+   */
+  circular: boolean;
+  /**
+   * The number of indirect references that were traversed to resolve the value.
+   * Resolving a single pointer may require resolving multiple $Refs.
+   */
+  indirections: number;
+
+  constructor($ref: $Ref<S, O>, path: string, friendlyPath?: string) {
+    this.$ref = $ref;
+
+    this.path = path;
+
+    this.originalPath = friendlyPath || path;
+
+    this.value = undefined;
+
+    this.circular = false;
+
+    this.indirections = 0;
+  }
+
+  /**
+   * Resolves the value of a nested property within the given object.
+   *
+   * @param obj - The object that will be crawled
+   * @param options
+   * @param pathFromRoot - the path of place that initiated resolving
+   *
+   * @returns
+   * Returns a JSON pointer whose {@link Pointer#value} is the resolved value.
+   * If resolving this value required resolving other JSON references, then
+   * the {@link Pointer#$ref} and {@link Pointer#path} will reflect the resolution path
+   * of the resolved value.
+   */
+  resolve(obj: S, options?: O, pathFromRoot?: string) {
+    const tokens = Pointer.parse(this.path, this.originalPath);
+    const found: any = [];
+
+    // Crawl the object, one token at a time
+    this.value = unwrapOrThrow(obj);
+
+    for (let i = 0; i < tokens.length; i++) {
+      if (resolveIf$Ref(this, options, pathFromRoot)) {
+        // The $ref path has changed, so append the remaining tokens to the path
+        this.path = Pointer.join(this.path, tokens.slice(i));
+      }
+
+      const token = tokens[i];
+
+      if (this.value[token] === undefined || (this.value[token] === null && i === tokens.length - 1)) {
+        // one final case is if the entry itself includes slashes, and was parsed out as a token - we can join the remaining tokens and try again
+        let didFindSubstringSlashMatch = false;
+        for (let j = tokens.length - 1; j > i; j--) {
+          const joinedToken = tokens.slice(i, j + 1).join("/");
+          if (this.value[joinedToken] !== undefined) {
+            this.value = this.value[joinedToken];
+            i = j;
+            didFindSubstringSlashMatch = true;
+            break;
+          }
+        }
+        if (didFindSubstringSlashMatch) {
+          continue;
+        }
+
+        // If the token we're looking for ended up not containing any slashes but is
+        // actually instead pointing to an existing `null` value then we should use that
+        // `null` value.
+        if (token in this.value && this.value[token] === null) {
+          // We use a `null` symbol for internal tracking to differntiate between a general `null`
+          // value and our expected `null` value.
+          this.value = nullSymbol;
+          continue;
+        }
+
+        this.value = null;
+
+        const path = this.$ref.path || "";
+
+        const targetRef = this.path.replace(path, "");
+        const targetFound = Pointer.join("", found);
+        const parentPath = pathFromRoot?.replace(path, "");
+
+        throw new MissingPointerError(token, decodeURI(this.originalPath), targetRef, targetFound, parentPath);
+      } else {
+        this.value = this.value[token];
+      }
+
+      found.push(token);
+    }
+
+    // Resolve the final value
+    if (!this.value || (this.value.$ref && url.resolve(this.path, this.value.$ref) !== pathFromRoot)) {
+      resolveIf$Ref(this, options, pathFromRoot);
+    }
+
+    return this;
+  }
+
+  /**
+   * Sets the value of a nested property within the given object.
+   *
+   * @param obj - The object that will be crawled
+   * @param value - the value to assign
+   * @param options
+   *
+   * @returns
+   * Returns the modified object, or an entirely new object if the entire object is overwritten.
+   */
+  set(obj: S, value: any, options?: O) {
+    const tokens = Pointer.parse(this.path);
+    let token;
+
+    if (tokens.length === 0) {
+      // There are no tokens, replace the entire object with the new value
+      this.value = value;
+      return value;
+    }
+
+    // Crawl the object, one token at a time
+    this.value = unwrapOrThrow(obj);
+
+    for (let i = 0; i < tokens.length - 1; i++) {
+      resolveIf$Ref(this, options);
+
+      token = tokens[i];
+      if (this.value && this.value[token] !== undefined) {
+        // The token exists
+        this.value = this.value[token];
+      } else {
+        // The token doesn't exist, so create it
+        this.value = setValue(this, token, {});
+      }
+    }
+
+    // Set the value of the final token
+    resolveIf$Ref(this, options);
+    token = tokens[tokens.length - 1];
+    setValue(this, token, value);
+
+    // Return the updated object
+    return obj;
+  }
+
+  /**
+   * Parses a JSON pointer (or a path containing a JSON pointer in the hash)
+   * and returns an array of the pointer's tokens.
+   * (e.g. "schema.json#/definitions/person/name" => ["definitions", "person", "name"])
+   *
+   * The pointer is parsed according to RFC 6901
+   * {@link https://tools.ietf.org/html/rfc6901#section-3}
+   *
+   * @param path
+   * @param [originalPath]
+   * @returns
+   */
+  static parse(path: string, originalPath?: string): string[] {
+    // Get the JSON pointer from the path's hash
+    const pointer = url.getHash(path).substring(1);
+
+    // If there's no pointer, then there are no tokens,
+    // so return an empty array
+    if (!pointer) {
+      return [];
+    }
+
+    // Split into an array
+    const split = pointer.split("/");
+
+    // Decode each part, according to RFC 6901
+    for (let i = 0; i < split.length; i++) {
+      split[i] = safeDecodeURIComponent(split[i].replace(escapedSlash, "/").replace(escapedTilde, "~"));
+    }
+
+    if (split[0] !== "") {
+      throw new InvalidPointerError(pointer, originalPath === undefined ? path : originalPath);
+    }
+
+    return split.slice(1);
+  }
+
+  /**
+   * Creates a JSON pointer path, by joining one or more tokens to a base path.
+   *
+   * @param base - The base path (e.g. "schema.json#/definitions/person")
+   * @param tokens - The token(s) to append (e.g. ["name", "first"])
+   * @returns
+   */
+  static join(base: string, tokens: string | string[]) {
+    // Ensure that the base path contains a hash
+    if (base.indexOf("#") === -1) {
+      base += "#";
+    }
+
+    // Append each token to the base path
+    tokens = Array.isArray(tokens) ? tokens : [tokens];
+    for (let i = 0; i < tokens.length; i++) {
+      const token = tokens[i];
+      // Encode the token, according to RFC 6901
+      base += "/" + encodeURIComponent(token.replace(tildes, "~0").replace(slashes, "~1"));
+    }
+
+    return base;
+  }
+}
+
+/**
+ * If the given pointer's {@link Pointer#value} is a JSON reference,
+ * then the reference is resolved and {@link Pointer#value} is replaced with the resolved value.
+ * In addition, {@link Pointer#path} and {@link Pointer#$ref} are updated to reflect the
+ * resolution path of the new value.
+ *
+ * @param pointer
+ * @param options
+ * @param [pathFromRoot] - the path of place that initiated resolving
+ * @returns - Returns `true` if the resolution path changed
+ */
+function resolveIf$Ref(pointer: any, options: any, pathFromRoot?: any) {
+  // Is the value a JSON reference? (and allowed?)
+
+  if ($Ref.isAllowed$Ref(pointer.value, options)) {
+    const $refPath = url.resolve(pointer.path, pointer.value.$ref);
+
+    if ($refPath === pointer.path && !isRootPath(pathFromRoot)) {
+      // The value is a reference to itself, so there's nothing to do.
+      pointer.circular = true;
+    } else {
+      const resolved = pointer.$ref.$refs._resolve($refPath, pointer.path, options);
+      if (resolved === null) {
+        return false;
+      }
+
+      pointer.indirections += resolved.indirections + 1;
+
+      if ($Ref.isExtended$Ref(pointer.value)) {
+        // This JSON reference "extends" the resolved value, rather than simply pointing to it.
+        // So the resolved path does NOT change.  Just the value does.
+        pointer.value = $Ref.dereference(pointer.value, resolved.value);
+        return false;
+      } else {
+        // Resolve the reference
+        pointer.$ref = resolved.$ref;
+        pointer.path = resolved.path;
+        pointer.value = resolved.value;
+      }
+
+      return true;
+    }
+  }
+  return undefined;
+}
+export default Pointer;
+
+/**
+ * Sets the specified token value of the {@link Pointer#value}.
+ *
+ * The token is evaluated according to RFC 6901.
+ * {@link https://tools.ietf.org/html/rfc6901#section-4}
+ *
+ * @param pointer - The JSON Pointer whose value will be modified
+ * @param token - A JSON Pointer token that indicates how to modify `obj`
+ * @param value - The value to assign
+ * @returns - Returns the assigned value
+ */
+function setValue(pointer: any, token: any, value: any) {
+  if (pointer.value && typeof pointer.value === "object") {
+    if (token === "-" && Array.isArray(pointer.value)) {
+      pointer.value.push(value);
+    } else {
+      pointer.value[token] = value;
+    }
+  } else {
+    throw new JSONParserError(
+      `Error assigning $ref pointer "${pointer.path}". \nCannot set "${token}" of a non-object.`,
+    );
+  }
+  return value;
+}
+
+function unwrapOrThrow(value: any) {
+  if (isHandledError(value)) {
+    throw value;
+  }
+
+  return value;
+}
+
+function isRootPath(pathFromRoot: any): boolean {
+  return typeof pathFromRoot == "string" && Pointer.parse(pathFromRoot).length == 0;
+}