17 files changed, 106 insertions, 81 deletions
diff --git a/.eslintrc.json b/.eslintrc.json
index 56bbcf09..a7fb842b 100644
--- a/.eslintrc.json
+++ b/.eslintrc.json
@@ -5,7 +5,7 @@
         "plugin:jsonc/recommended-with-json"
     ],
     "parserOptions": {
-        "ecmaVersion": 9,
+        "ecmaVersion": 11,
         "sourceType": "script",
         "ecmaFeatures": {
             "globalReturn": false,
@@ -401,7 +401,8 @@
                 "DynamicProperty": "readonly",
                 "EventDispatcher": "readonly",
                 "EventListenerCollection": "readonly",
-                "Logger": "readonly"
+                "Logger": "readonly",
+                "import": "readonly"
             }
         },
         {
diff --git a/.gitignore b/.gitignore
index 405fead0..426db4ad 100644
--- a/.gitignore
+++ b/.gitignore
@@ -7,3 +7,4 @@ dictionaries/
 /playwright/.cache/
 /test/playwright/__screenshots__/
 ext/manifest.json
+ext/lib/validate-schemas.js
diff --git a/dev/build.js b/dev/build.js
index 24b1e2d0..3bfb5418 100644
--- a/dev/build.js
+++ b/dev/build.js
@@ -24,7 +24,8 @@ const childProcess = require('child_process');
 const util = require('./util');
 const {getAllFiles, getArgs, testMain} = util;
 const {ManifestUtil} = require('./manifest-util');
-
+const Ajv = require('ajv');
+const standaloneCode = require('ajv/dist/standalone').default;
 
 async function createZip(directory, excludeFiles, outputFileName, sevenZipExes, onUpdate, dryRun) {
     try {
@@ -130,6 +131,19 @@ async function build(buildDir, extDir, manifestUtil, variantNames, manifestPath,
         process.stdout.write(message);
     };
 
+    process.stdout.write('Building schema validators using ajv\n');
+    const schemaDir = path.join(extDir, 'data/schemas/');
+    const schemaFileNames = fs.readdirSync(schemaDir);
+    const schemas = schemaFileNames.map((schemaFileName) => JSON.parse(fs.readFileSync(path.join(schemaDir, schemaFileName))));
+    const ajv = new Ajv({schemas: schemas, code: {source: true, esm: true}});
+    const moduleCode = standaloneCode(ajv);
+
+    // https://github.com/ajv-validator/ajv/issues/2209
+    const patchedModuleCode = moduleCode.replaceAll('require("ajv/dist/runtime/ucs2length").default', 'import("/lib/ucs2length.js").default');
+
+    fs.writeFileSync(path.join(extDir, 'lib/validate-schemas.js'), patchedModuleCode);
+
+
     process.stdout.write(`Version: ${yomitanVersion}...\n`);
 
     for (const variantName of variantNames) {
diff --git a/ext/data/schemas/custom-audio-list-schema.json b/ext/data/schemas/custom-audio-list-schema.json
index 2cb3ca78..885ad087 100644
--- a/ext/data/schemas/custom-audio-list-schema.json
+++ b/ext/data/schemas/custom-audio-list-schema.json
@@ -1,4 +1,5 @@
 {
+    "$id": "customAudioList",
     "$schema": "http://json-schema.org/draft-07/schema#",
     "type": "object",
     "required": [
diff --git a/ext/data/schemas/dictionary-index-schema.json b/ext/data/schemas/dictionary-index-schema.json
index a8ca0f23..98b27143 100644
--- a/ext/data/schemas/dictionary-index-schema.json
+++ b/ext/data/schemas/dictionary-index-schema.json
@@ -1,4 +1,5 @@
 {
+    "$id": "dictionaryIndex",
     "$schema": "http://json-schema.org/draft-07/schema#",
     "type": "object",
     "description": "Index file containing information about the data contained in the dictionary.",
diff --git a/ext/data/schemas/dictionary-kanji-bank-v1-schema.json b/ext/data/schemas/dictionary-kanji-bank-v1-schema.json
index 5aca2d6a..d506a19d 100644
--- a/ext/data/schemas/dictionary-kanji-bank-v1-schema.json
+++ b/ext/data/schemas/dictionary-kanji-bank-v1-schema.json
@@ -1,4 +1,5 @@
 {
+    "$id": "dictionaryKanjiBankV1",
     "$schema": "http://json-schema.org/draft-07/schema#",
     "type": "array",
     "description": "Data file containing kanji information.",
@@ -30,4 +31,4 @@
             "description": "A meaning for the kanji character."
         }
     }
-}
-\ No newline at end of file
+}
diff --git a/ext/data/schemas/dictionary-kanji-bank-v3-schema.json b/ext/data/schemas/dictionary-kanji-bank-v3-schema.json
index ee508294..763ce3b1 100644
--- a/ext/data/schemas/dictionary-kanji-bank-v3-schema.json
+++ b/ext/data/schemas/dictionary-kanji-bank-v3-schema.json
@@ -1,4 +1,5 @@
 {
+    "$id": "dictionaryKanjiBankV3",
     "$schema": "http://json-schema.org/draft-07/schema#",
     "type": "array",
     "description": "Data file containing kanji information.",
@@ -42,4 +43,4 @@
             }
         ]
     }
-}
-\ No newline at end of file
+}
diff --git a/ext/data/schemas/dictionary-kanji-meta-bank-v3-schema.json b/ext/data/schemas/dictionary-kanji-meta-bank-v3-schema.json
index e478de93..d8f5031b 100644
--- a/ext/data/schemas/dictionary-kanji-meta-bank-v3-schema.json
+++ b/ext/data/schemas/dictionary-kanji-meta-bank-v3-schema.json
@@ -1,4 +1,5 @@
 {
+    "$id": "dictionaryKanjiMetaBankV3",
     "$schema": "http://json-schema.org/draft-07/schema#",
     "definitions": {
         "frequency": {
diff --git a/ext/data/schemas/dictionary-tag-bank-v3-schema.json b/ext/data/schemas/dictionary-tag-bank-v3-schema.json
index f7721119..ab6e3377 100644
--- a/ext/data/schemas/dictionary-tag-bank-v3-schema.json
+++ b/ext/data/schemas/dictionary-tag-bank-v3-schema.json
@@ -1,4 +1,5 @@
 {
+    "$id": "dictionaryTagBankV3",
     "$schema": "http://json-schema.org/draft-07/schema#",
     "type": "array",
     "description": "Data file containing tag information for terms and kanji.",
diff --git a/ext/data/schemas/dictionary-term-bank-v1-schema.json b/ext/data/schemas/dictionary-term-bank-v1-schema.json
index 9366e9ff..ab4c49f6 100644
--- a/ext/data/schemas/dictionary-term-bank-v1-schema.json
+++ b/ext/data/schemas/dictionary-term-bank-v1-schema.json
@@ -1,4 +1,5 @@
 {
+    "$id": "dictionaryTermBankV1",
     "$schema": "http://json-schema.org/draft-07/schema#",
     "type": "array",
     "description": "Data file containing term information.",
diff --git a/ext/data/schemas/dictionary-term-bank-v3-schema.json b/ext/data/schemas/dictionary-term-bank-v3-schema.json
index 335144c7..7d0b4868 100644
--- a/ext/data/schemas/dictionary-term-bank-v3-schema.json
+++ b/ext/data/schemas/dictionary-term-bank-v3-schema.json
@@ -1,4 +1,5 @@
 {
+    "$id": "dictionaryTermBankV3",
     "$schema": "http://json-schema.org/draft-07/schema#",
     "definitions": {
         "structuredContent": {
diff --git a/ext/data/schemas/dictionary-term-meta-bank-v3-schema.json b/ext/data/schemas/dictionary-term-meta-bank-v3-schema.json
index eb4d3fed..86e4af93 100644
--- a/ext/data/schemas/dictionary-term-meta-bank-v3-schema.json
+++ b/ext/data/schemas/dictionary-term-meta-bank-v3-schema.json
@@ -1,4 +1,5 @@
 {
+    "$id": "dictionaryTermMetaBankV3",
     "$schema": "http://json-schema.org/draft-07/schema#",
     "definitions": {
         "frequency": {
diff --git a/ext/data/schemas/options-schema.json b/ext/data/schemas/options-schema.json
index 601f5d06..8ccbfa94 100644
--- a/ext/data/schemas/options-schema.json
+++ b/ext/data/schemas/options-schema.json
@@ -1,4 +1,5 @@
 {
+    "$id": "options",
     "$schema": "http://json-schema.org/draft-07/schema#",
     "type": "object",
     "required": [
diff --git a/ext/js/language/dictionary-importer.js b/ext/js/language/dictionary-importer.js
index 718d9f1c..0cf3d5f5 100644
--- a/ext/js/language/dictionary-importer.js
+++ b/ext/js/language/dictionary-importer.js
@@ -18,7 +18,6 @@
 
 /* global
  * JSZip
- * JsonSchema
  * MediaUtil
  */
 
@@ -51,8 +50,10 @@ class DictionaryImporter {
 
         const index = JSON.parse(await indexFile.async('string'));
 
-        const indexSchema = await this._getSchema('/data/schemas/dictionary-index-schema.json');
-        this._validateJsonSchema(index, indexSchema, indexFileName);
+        const ajvSchemas = await import('/lib/validate-schemas.js');
+        if (!ajvSchemas.dictionaryIndex(index)) {
+            throw this._formatAjvSchemaError(ajvSchemas.dictionaryIndex, indexFileName);
+        }
 
         const dictionaryTitle = index.title;
         const version = index.format || index.version;
@@ -75,8 +76,7 @@ class DictionaryImporter {
 
         // Load schemas
         this._progressNextStep(0);
-        const dataBankSchemaPaths = this._getDataBankSchemaPaths(version);
-        const dataBankSchemas = await Promise.all(dataBankSchemaPaths.map((path) => this._getSchema(path)));
+        const dataBankSchemas = this._getDataBankSchemas(version);
 
         // Files
         const termFiles      = this._getArchiveFiles(archive, 'term_bank_?.json');
@@ -87,11 +87,11 @@ class DictionaryImporter {
 
         // Load data
         this._progressNextStep(termFiles.length + termMetaFiles.length + kanjiFiles.length + kanjiMetaFiles.length + tagFiles.length);
-        const termList      = await this._readFileSequence(termFiles,      convertTermBankEntry,      dataBankSchemas[0], dictionaryTitle);
-        const termMetaList  = await this._readFileSequence(termMetaFiles,  convertTermMetaBankEntry,  dataBankSchemas[1], dictionaryTitle);
-        const kanjiList     = await this._readFileSequence(kanjiFiles,     convertKanjiBankEntry,     dataBankSchemas[2], dictionaryTitle);
-        const kanjiMetaList = await this._readFileSequence(kanjiMetaFiles, convertKanjiMetaBankEntry, dataBankSchemas[3], dictionaryTitle);
-        const tagList       = await this._readFileSequence(tagFiles,       convertTagBankEntry,       dataBankSchemas[4], dictionaryTitle);
+        const termList      = await this._readFileSequence(ajvSchemas, termFiles,      convertTermBankEntry,      dataBankSchemas[0], dictionaryTitle);
+        const termMetaList  = await this._readFileSequence(ajvSchemas, termMetaFiles,  convertTermMetaBankEntry,  dataBankSchemas[1], dictionaryTitle);
+        const kanjiList     = await this._readFileSequence(ajvSchemas, kanjiFiles,     convertKanjiBankEntry,     dataBankSchemas[2], dictionaryTitle);
+        const kanjiMetaList = await this._readFileSequence(ajvSchemas, kanjiMetaFiles, convertKanjiMetaBankEntry, dataBankSchemas[3], dictionaryTitle);
+        const tagList       = await this._readFileSequence(ajvSchemas, tagFiles,       convertTagBankEntry,       dataBankSchemas[4], dictionaryTitle);
         this._addOldIndexTags(index, tagList, dictionaryTitle);
 
         // Prefix wildcard support
@@ -214,68 +214,27 @@ class DictionaryImporter {
         return summary;
     }
 
-    async _getSchema(fileName) {
-        const schema = await this._fetchJsonAsset(fileName);
-        return new JsonSchema(schema);
-    }
-
-    _validateJsonSchema(value, schema, fileName) {
-        try {
-            schema.validate(value);
-        } catch (e) {
-            throw this._formatSchemaError(e, fileName);
-        }
-    }
-
-    _formatSchemaError(e, fileName) {
-        const valuePathString = this._getSchemaErrorPathString(e.valueStack, 'dictionary');
-        const schemaPathString = this._getSchemaErrorPathString(e.schemaStack, 'schema');
-
-        const e2 = new Error(`Dictionary has invalid data in '${fileName}' for value '${valuePathString}', validated against '${schemaPathString}': ${e.message}`);
-        e2.data = e;
+    _formatAjvSchemaError(schema, fileName) {
+        const e2 = new Error(`Dictionary has invalid data in '${fileName}'`);
+        e2.data = schema.errors;
 
         return e2;
     }
 
-    _getSchemaErrorPathString(infoList, base='') {
-        let result = base;
-        for (const {path} of infoList) {
-            const pathArray = Array.isArray(path) ? path : [path];
-            for (const pathPart of pathArray) {
-                if (pathPart === null) {
-                    result = base;
-                } else {
-                    switch (typeof pathPart) {
-                        case 'string':
-                            if (result.length > 0) {
-                                result += '.';
-                            }
-                            result += pathPart;
-                            break;
-                        case 'number':
-                            result += `[${pathPart}]`;
-                            break;
-                    }
-                }
-            }
-        }
-        return result;
-    }
-
-    _getDataBankSchemaPaths(version) {
+    _getDataBankSchemas(version) {
         const termBank = (
             version === 1 ?
-            '/data/schemas/dictionary-term-bank-v1-schema.json' :
-            '/data/schemas/dictionary-term-bank-v3-schema.json'
+            'dictionaryTermBankV1' :
+            'dictionaryTermBankV3'
         );
-        const termMetaBank = '/data/schemas/dictionary-term-meta-bank-v3-schema.json';
+        const termMetaBank = 'dictionaryTermMetaBankV3';
         const kanjiBank = (
             version === 1 ?
-            '/data/schemas/dictionary-kanji-bank-v1-schema.json' :
-            '/data/schemas/dictionary-kanji-bank-v3-schema.json'
+            'dictionaryKanjiBankV1' :
+            'dictionaryKanjiBankV3'
         );
-        const kanjiMetaBank = '/data/schemas/dictionary-kanji-meta-bank-v3-schema.json';
-        const tagBank = '/data/schemas/dictionary-tag-bank-v3-schema.json';
+        const kanjiMetaBank = 'dictionaryKanjiMetaBankV3';
+        const tagBank = 'dictionaryTagBankV3';
 
         return [termBank, termMetaBank, kanjiBank, kanjiMetaBank, tagBank];
     }
@@ -539,28 +498,20 @@ class DictionaryImporter {
         return results;
     }
 
-    async _readFileSequence(files, convertEntry, schema, dictionaryTitle) {
+    async _readFileSequence(ajvSchemas, files, convertEntry, schemaName, dictionaryTitle) {
         const progressData = this._progressData;
-        let count = 0;
         let startIndex = 0;
-        if (typeof this._onProgress === 'function') {
-            schema.progressInterval = 1000;
-            schema.progress = (s) => {
-                const index = s.getValueStackLength() > 1 ? s.getValueStackItem(1).path : 0;
-                progressData.index = startIndex + (index / count);
-                this._progress();
-            };
-        }
 
         const results = [];
         for (const file of files) {
             const entries = JSON.parse(await file.async('string'));
 
-            count = Array.isArray(entries) ? Math.max(entries.length, 1) : 1;
             startIndex = progressData.index;
             this._progress();
 
-            this._validateJsonSchema(entries, schema, file.name);
+            if (!ajvSchemas[schemaName](entries)) {
+                throw this._formatAjvSchemaError(ajvSchemas[schemaName], file.name);
+            }
 
             progressData.index = startIndex + 1;
             this._progress();
diff --git a/ext/lib/ucs2length.js b/ext/lib/ucs2length.js
new file mode 100644
index 00000000..120a64d4
--- /dev/null
+++ b/ext/lib/ucs2length.js
@@ -0,0 +1,16 @@
+export default function ucs2length(str) {
+    const len = str.length;
+    let length = 0;
+    let pos = 0;
+    let value;
+    while (pos < len) {
+        length++;
+        value = str.charCodeAt(pos++);
+        if (value >= 0xd800 && value <= 0xdbff && pos < len) {
+            // high surrogate, and there is a next character
+            value = str.charCodeAt(pos);
+            if ((value & 0xfc00) === 0xdc00) pos++; // low surrogate
+        }
+    }
+    return length;
+}
diff --git a/package-lock.json b/package-lock.json
index 24e49c86..6f6581b7 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -11,7 +11,8 @@
             "license": "GPL-3.0-or-later",
             "devDependencies": {
                 "@playwright/test": "^1.39.0",
-                "ajv": "^8.11.0",
+                "@types/node": "^20.8.10",
+                "ajv": "^8.12.0",
                 "browserify": "^17.0.0",
                 "css": "^3.0.0",
                 "eslint": "^8.52.0",
@@ -523,6 +524,15 @@
             "integrity": "sha512-jhuKLIRrhvCPLqwPcx6INqmKeiA5EWrsCOPhrlFSrbrmU4ZMPjj5Ul/oLCMDO98XRUIwVm78xICz4EPCektzeQ==",
             "dev": true
         },
+        "node_modules/@types/node": {
+            "version": "20.8.10",
+            "resolved": "https://registry.npmjs.org/@types/node/-/node-20.8.10.tgz",
+            "integrity": "sha512-TlgT8JntpcbmKUFzjhsyhGfP2fsiz1Mv56im6enJ905xG1DAYesxJaeSbGqQmAw8OWPdhyJGhGSQGKRNJ45u9w==",
+            "dev": true,
+            "dependencies": {
+                "undici-types": "~5.26.4"
+            }
+        },
         "node_modules/@types/normalize-package-data": {
             "version": "2.4.1",
             "resolved": "https://registry.npmjs.org/@types/normalize-package-data/-/normalize-package-data-2.4.1.tgz",
@@ -5246,6 +5256,12 @@
                 "undeclared-identifiers": "bin.js"
             }
         },
+        "node_modules/undici-types": {
+            "version": "5.26.5",
+            "resolved": "https://registry.npmjs.org/undici-types/-/undici-types-5.26.5.tgz",
+            "integrity": "sha512-JlCMO+ehdEIKqlFxk6IfVoAUVmgz7cU7zD/h9XZ0qzeosSHmUJVOzSQvvYSYWXkFXC+IfLKSIffhv0sVZup6pA==",
+            "dev": true
+        },
         "node_modules/universalify": {
             "version": "0.2.0",
             "resolved": "https://registry.npmjs.org/universalify/-/universalify-0.2.0.tgz",
@@ -5985,6 +6001,15 @@
             "integrity": "sha512-jhuKLIRrhvCPLqwPcx6INqmKeiA5EWrsCOPhrlFSrbrmU4ZMPjj5Ul/oLCMDO98XRUIwVm78xICz4EPCektzeQ==",
             "dev": true
         },
+        "@types/node": {
+            "version": "20.8.10",
+            "resolved": "https://registry.npmjs.org/@types/node/-/node-20.8.10.tgz",
+            "integrity": "sha512-TlgT8JntpcbmKUFzjhsyhGfP2fsiz1Mv56im6enJ905xG1DAYesxJaeSbGqQmAw8OWPdhyJGhGSQGKRNJ45u9w==",
+            "dev": true,
+            "requires": {
+                "undici-types": "~5.26.4"
+            }
+        },
         "@types/normalize-package-data": {
             "version": "2.4.1",
             "resolved": "https://registry.npmjs.org/@types/normalize-package-data/-/normalize-package-data-2.4.1.tgz",
@@ -9581,6 +9606,12 @@
                 "xtend": "^4.0.1"
             }
         },
+        "undici-types": {
+            "version": "5.26.5",
+            "resolved": "https://registry.npmjs.org/undici-types/-/undici-types-5.26.5.tgz",
+            "integrity": "sha512-JlCMO+ehdEIKqlFxk6IfVoAUVmgz7cU7zD/h9XZ0qzeosSHmUJVOzSQvvYSYWXkFXC+IfLKSIffhv0sVZup6pA==",
+            "dev": true
+        },
         "universalify": {
             "version": "0.2.0",
             "resolved": "https://registry.npmjs.org/universalify/-/universalify-0.2.0.tgz",
diff --git a/package.json b/package.json
index 22f5bd56..ee95d388 100644
--- a/package.json
+++ b/package.json
@@ -36,7 +36,8 @@
     },
     "devDependencies": {
         "@playwright/test": "^1.39.0",
-        "ajv": "^8.11.0",
+        "@types/node": "^20.8.10",
+        "ajv": "^8.12.0",
         "browserify": "^17.0.0",
         "css": "^3.0.0",
         "eslint": "^8.52.0",