Basic Spanish Transforms (#908)

* Spanish transforms

* Add more spanish transforms

* Address comments

* Fix types

* Undo prefix change

5 files changed, 194 insertions, 3 deletions

diff --git a/ext/js/core/log.js b/ext/js/core/log.js
index 8401cc2b..cb714e70 100644
--- a/ext/js/core/log.js
+++ b/ext/js/core/log.js
@@ -73,7 +73,7 @@ class Logger extends EventDispatcher {
      */
     logGenericError(error, level, context) {
         if (typeof context === 'undefined') {
-            context = {url: location.href};
+            context = typeof location === 'undefined' ? {url: 'unknown'} : {url: location.href};
         }
 
         let errorString;
diff --git a/ext/js/language/es/spanish-transforms.js b/ext/js/language/es/spanish-transforms.js
new file mode 100644
index 00000000..cf145f6a
--- /dev/null
+++ b/ext/js/language/es/spanish-transforms.js
@@ -0,0 +1,171 @@
+/*
+ * Copyright (C) 2024  Yomitan Authors
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+import {suffixInflection, wholeWordInflection} from '../language-transforms.js';
+
+const ACCENTS = new Map([
+    ['a', 'á'],
+    ['e', 'é'],
+    ['i', 'í'],
+    ['o', 'ó'],
+    ['u', 'ú']
+]);
+
+
+/**
+ * @param {string} char
+ * @returns {string}
+ */
+function addAccent(char) {
+    return ACCENTS.get(char) || char;
+}
+
+/** @type {import('language-transformer').LanguageTransformDescriptor} */
+export const spanishTransforms = {
+    language: 'es',
+    conditions: {
+        v: {
+            name: 'Verb',
+            isDictionaryForm: true,
+            subConditions: ['v_ar', 'v_er', 'v_ir']
+        },
+        v_ar: {
+            name: '-ar verb',
+            isDictionaryForm: true
+        },
+        v_er: {
+            name: '-er verb',
+            isDictionaryForm: true
+        },
+        v_ir: {
+            name: '-ir verb',
+            isDictionaryForm: true
+        },
+        n: {
+            name: 'Noun',
+            isDictionaryForm: true,
+            subConditions: ['ns', 'np']
+        },
+        np: {
+            name: 'Noun plural',
+            isDictionaryForm: true
+        },
+        ns: {
+            name: 'Noun singular',
+            isDictionaryForm: true
+        },
+        adj: {
+            name: 'Adjective',
+            isDictionaryForm: true
+        }
+    },
+    transforms: [
+        {
+            name: 'plural',
+            description: 'Plural form of a noun',
+            rules: [
+                suffixInflection('s', '', ['np'], ['ns']),
+                suffixInflection('es', '', ['np'], ['ns']),
+                suffixInflection('ces', 'z', ['np'], ['ns']), // 'lápices' -> lápiz
+                ...[...'aeiou'].map((v) => suffixInflection(`${v}ses`, `${addAccent(v)}s`, ['np'], ['ns'])), // 'autobuses' -> autobús
+                ...[...'aeiou'].map((v) => suffixInflection(`${v}nes`, `${addAccent(v)}n`, ['np'], ['ns'])) // 'canciones' -> canción
+            ]
+        },
+        {
+            name: 'feminine adjective',
+            description: 'feminine form of an adjective',
+            rules: [
+                suffixInflection('a', 'o', ['adj'], ['adj'])
+            ]
+        },
+        {
+            name: 'present indicative',
+            description: 'Present indicative form of a verb',
+            rules: [
+                // -ar verbs
+                suffixInflection('o', 'ar', ['v'], ['v']),
+                suffixInflection('as', 'ar', ['v'], ['v']),
+                suffixInflection('a', 'ar', ['v'], ['v']),
+                suffixInflection('amos', 'ar', ['v'], ['v']),
+                suffixInflection('áis', 'ar', ['v'], ['v']),
+                suffixInflection('an', 'ar', ['v'], ['v']),
+                // -er verbs
+                suffixInflection('o', 'er', ['v'], ['v']),
+                suffixInflection('es', 'er', ['v'], ['v']),
+                suffixInflection('e', 'er', ['v'], ['v']),
+                suffixInflection('emos', 'er', ['v'], ['v']),
+                suffixInflection('éis', 'er', ['v'], ['v']),
+                suffixInflection('en', 'er', ['v'], ['v']),
+                // -ir verbs
+                suffixInflection('o', 'ir', ['v'], ['v']),
+                suffixInflection('es', 'ir', ['v'], ['v']),
+                suffixInflection('e', 'ir', ['v'], ['v']),
+                suffixInflection('imos', 'ir', ['v'], ['v']),
+                suffixInflection('ís', 'ir', ['v'], ['v']),
+                suffixInflection('en', 'ir', ['v'], ['v']),
+                // -tener verbs
+                suffixInflection('tengo', 'tener', ['v'], ['v']),
+                suffixInflection('tienes', 'tener', ['v'], ['v']),
+                suffixInflection('tiene', 'tener', ['v'], ['v']),
+                suffixInflection('tenemos', 'tener', ['v'], ['v']),
+                suffixInflection('tenéis', 'tener', ['v'], ['v']),
+                suffixInflection('tienen', 'tener', ['v'], ['v']),
+                // Verbs with Irregular Yo Forms
+                // -guir, -ger, or -gir verbs
+                suffixInflection('go', 'guir', ['v'], ['v']),
+                suffixInflection('jo', 'ger', ['v'], ['v']),
+                suffixInflection('jo', 'gir', ['v'], ['v']),
+                suffixInflection('aigo', 'aer', ['v'], ['v']),
+                suffixInflection('zco', 'cer', ['v'], ['v']),
+                suffixInflection('zco', 'cir', ['v'], ['v']),
+                suffixInflection('hago', 'hacer', ['v'], ['v']),
+                suffixInflection('pongo', 'poner', ['v'], ['v']),
+                suffixInflection('lgo', 'lir', ['v'], ['v']),
+                suffixInflection('lgo', 'ler', ['v'], ['v']),
+                wholeWordInflection('quepo', 'caber', ['v'], ['v']),
+                wholeWordInflection('doy', 'dar', ['v'], ['v']),
+                wholeWordInflection('sé', 'saber', ['v'], ['v']),
+                wholeWordInflection('veo', 'ver', ['v'], ['v']),
+                // Ser, estar, ir, haber
+                wholeWordInflection('soy', 'ser', ['v'], ['v']),
+                wholeWordInflection('eres', 'ser', ['v'], ['v']),
+                wholeWordInflection('es', 'ser', ['v'], ['v']),
+                wholeWordInflection('somos', 'ser', ['v'], ['v']),
+                wholeWordInflection('sois', 'ser', ['v'], ['v']),
+                wholeWordInflection('son', 'ser', ['v'], ['v']),
+                wholeWordInflection('estoy', 'estar', ['v'], ['v']),
+                wholeWordInflection('estás', 'estar', ['v'], ['v']),
+                wholeWordInflection('está', 'estar', ['v'], ['v']),
+                wholeWordInflection('estamos', 'estar', ['v'], ['v']),
+                wholeWordInflection('estáis', 'estar', ['v'], ['v']),
+                wholeWordInflection('están', 'estar', ['v'], ['v']),
+                wholeWordInflection('voy', 'ir', ['v'], ['v']),
+                wholeWordInflection('vas', 'ir', ['v'], ['v']),
+                wholeWordInflection('va', 'ir', ['v'], ['v']),
+                wholeWordInflection('vamos', 'ir', ['v'], ['v']),
+                wholeWordInflection('vais', 'ir', ['v'], ['v']),
+                wholeWordInflection('van', 'ir', ['v'], ['v']),
+                wholeWordInflection('he', 'haber', ['v'], ['v']),
+                wholeWordInflection('has', 'haber', ['v'], ['v']),
+                wholeWordInflection('ha', 'haber', ['v'], ['v']),
+                wholeWordInflection('hemos', 'haber', ['v'], ['v']),
+                wholeWordInflection('habéis', 'haber', ['v'], ['v']),
+                wholeWordInflection('han', 'haber', ['v'], ['v'])
+            ]
+        }
+    ]
+};
diff --git a/ext/js/language/language-descriptors.js b/ext/js/language/language-descriptors.js
index baf53f81..3a78aff5 100644
--- a/ext/js/language/language-descriptors.js
+++ b/ext/js/language/language-descriptors.js
@@ -19,6 +19,7 @@ import {removeArabicScriptDiacritics} from './ar/arabic-text-preprocessors.js';
 import {eszettPreprocessor} from './de/german-text-preprocessors.js';
 import {germanTransforms} from './de/german-transforms.js';
 import {englishTransforms} from './en/english-transforms.js';
+import {spanishTransforms} from './es/spanish-transforms.js';
 import {
     alphabeticToHiragana,
     alphanumericWidthVariants,
@@ -78,7 +79,8 @@ const languageDescriptors = [
         iso: 'es',
         name: 'Spanish',
         exampleText: 'acabar de',
-        textPreprocessors: capitalizationPreprocessors
+        textPreprocessors: capitalizationPreprocessors,
+        languageTransforms: spanishTransforms
     },
     {
         iso: 'fa',
diff --git a/ext/js/language/language-transformer.js b/ext/js/language/language-transformer.js
index 47f31b5f..f859ebf2 100644
--- a/ext/js/language/language-transformer.js
+++ b/ext/js/language/language-transformer.js
@@ -132,7 +132,7 @@ export class LanguageTransformer {
 
                     const isCycle = trace.some((frame) => frame.transform === name && frame.ruleIndex === j && frame.text === text);
                     if (isCycle) {
-                        log.warn(new Error(`Cycle detected in transform[${name}] rule[${j}] for text: ${text}`));
+                        log.warn(new Error(`Cycle detected in transform[${name}] rule[${j}] for text: ${text}\nTrace: ${JSON.stringify(trace)}`));
                         continue;
                     }
 
diff --git a/ext/js/language/language-transforms.js b/ext/js/language/language-transforms.js
index ee8af88b..f3e36560 100644
--- a/ext/js/language/language-transforms.js
+++ b/ext/js/language/language-transforms.js
@@ -52,3 +52,21 @@ export function prefixInflection(inflectedPrefix, deinflectedPrefix, conditionsI
         conditionsOut
     };
 }
+
+/**
+ * @param {string} inflectedWord
+ * @param {string} deinflectedWord
+ * @param {string[]} conditionsIn
+ * @param {string[]} conditionsOut
+ * @returns {import('language-transformer').Rule}
+ */
+export function wholeWordInflection(inflectedWord, deinflectedWord, conditionsIn, conditionsOut) {
+    const regex = new RegExp('^' + inflectedWord + '$');
+    return {
+        type: 'wholeWord',
+        isInflected: regex,
+        deinflect: () => deinflectedWord,
+        conditionsIn,
+        conditionsOut
+    };
+}