Handle generic validation error (#103)

Currently we don't return validation errors when we don't have valid
corresponding pointers. However we wouldn't always have valid pointers
e.g. if the data isn't a valid JSON object (see
#98)

Here I just `pushRoot` in those cases. We can consider adding the
default root `#` pointer but the effect will be the same (i.e. by
default all entries will _at least_ match the root pointer and so will
set the range to the root)

.changeset/weak-bobcats-scream.md

@@ -0,0 +1,5 @@
+---
+"codemirror-json-schema": patch
+---
+
+Handle generic validation error

src/index.ts

@@ -1,13 +1,19 @@
-export { jsonCompletion } from "./json-completion.js";
+export {
+  jsonCompletion,
+  JSONCompletion,
+  type JSONCompletionOptions,
+} from "./json-completion.js";
 
 export {
   jsonSchemaLinter,
+  JSONValidation,
   type JSONValidationOptions,
   handleRefresh,
 } from "./json-validation.js";
 
 export {
   jsonSchemaHover,
+  JSONHover,
   type HoverOptions,
   type FoundCursorData,
   type CursorData,

src/json-validation.ts

@@ -4,14 +4,14 @@ import { Draft04, type Draft, type JsonError } from "json-schema-library";
 
 import { getJSONSchema, schemaStateField } from "./state.js";
 import { joinWithOr } from "./utils/formatting.js";
-import { JSONMode, JSONPointerData } from "./types.js";
+import { JSONMode, JSONPointerData, RequiredPick } from "./types.js";
 import { parseJSONDocumentState } from "./utils/parseJSONDocument.js";
-import { RequiredPick } from "./types.js";
 import { el } from "./utils/dom.js";
 import { renderMarkdown } from "./utils/markdown.js";
 import { MODES } from "./constants.js";
 import { parseYAMLDocumentState } from "./utils/parse-yaml-document.js";
 import { parseJSON5DocumentState } from "./utils/parseJSON5Document.js";
+import { debug } from "./utils/debug.js";
 
 const getDefaultParser = (mode: JSONMode): typeof parseJSONDocumentState => {
   switch (mode) {
@@ -96,7 +96,7 @@ export class JSONValidation {
     const errors = errorData?.errors as string[];
     if (error.code === "one-of-error" && errors?.length) {
       return `Expected one of ${joinWithOr(
-        errors as string[],
+        errors,
         (data) => data.data.expected
       )}`;
     }
@@ -110,6 +110,7 @@ export class JSONValidation {
     const message = error.message
       // don't mention root object
       .replaceAll("in `#` ", "")
+      .replaceAll("at `#`", "")
       .replaceAll("/", ".")
       .replaceAll("#.", "");
     return message;
@@ -135,9 +136,10 @@ export class JSONValidation {
     try {
       errors = this.schema.validate(json.data);
     } catch {}
+    debug.log("xxx", "validation errors", errors, json.data);
     if (!errors.length) return [];
     // reduce() because we want to filter out errors that don't have a pointer
-    return errors.reduce((acc, error) => {
+    return errors.reduce<Diagnostic[]>((acc, error) => {
       const pushRoot = () => {
         const errorString = this.rewriteError(error);
         acc.push({
@@ -156,12 +158,11 @@ export class JSONValidation {
       const errorPath = getErrorPath(error);
       const pointer = json.pointers.get(errorPath) as JSONPointerData;
       if (
-        error.name === "MaxPropertiesError" ??
+        error.name === "MaxPropertiesError" ||
         error.name === "MinPropertiesError"
       ) {
         pushRoot();
-      }
-      if (pointer) {
+      } else if (pointer) {
         // if the error is a property error, use the key position
         const isKeyError = positionalErrors.includes(error.name);
         const errorString = this.rewriteError(error);
@@ -182,8 +183,10 @@ export class JSONValidation {
             source: this.schemaTitle,
           });
         }
+      } else {
+        pushRoot();
       }
       return acc;
-    }, [] as Diagnostic[]);
+    }, []);
   }
 }