add i18n schema to JSON validator

docs/release-notes.md

@@ -20,6 +20,7 @@
 
 * For the web UI:
   * Added GitHub licenses to mod compatibility list.
+  * Added SMAPI `i18n` schema to JSON validator.
   * Updated ModDrop URLs.
   * Internal changes to improve performance and reliability.
 

docs/technical/web.md

@@ -110,8 +110,9 @@ Available schemas:
 
 format | schema URL
 ------ | ----------
-[SMAPI `manifest.json`](https://stardewvalleywiki.com/Modding:Modder_Guide/APIs/Manifest) | https://smapi.io/schemas/manifest.json
-[Content Patcher `content.json`](https://github.com/Pathoschild/StardewMods/tree/develop/ContentPatcher#readme) | https://smapi.io/schemas/content-patcher.json
+[SMAPI: `manifest.json`](https://stardewvalleywiki.com/Modding:Modder_Guide/APIs/Manifest) | https://smapi.io/schemas/manifest.json
+[SMAPI: translations (`i18n` folder)](https://stardewvalleywiki.com/Modding:Modder_Guide/APIs/Translation) | https://smapi.io/schemas/i18n.json
+[Content Patcher: `content.json`](https://github.com/Pathoschild/StardewMods/tree/develop/ContentPatcher#readme) | https://smapi.io/schemas/content-patcher.json
 
 ## Web API
 ### Overview

src/SMAPI.Web/Controllers/JsonValidatorController.cs

@@ -27,7 +27,8 @@ namespace StardewModdingAPI.Web.Controllers
         private readonly IDictionary<string, string> SchemaFormats = new Dictionary<string, string>
         {
             ["none"] = "None",
-            ["manifest"] = "Manifest",
+            ["manifest"] = "SMAPI: manifest",
+            ["i18n"] = "SMAPI: translations (i18n)",
             ["content-patcher"] = "Content Patcher"
         };
 

src/SMAPI.Web/wwwroot/schemas/i18n.json

@@ -0,0 +1,24 @@
+{
+    "$schema": "http://json-schema.org/draft-07/schema#",
+    "$id": "https://smapi.io/schemas/i18n.json",
+    "title": "SMAPI i18n file",
+    "description": "A translation file for a SMAPI mod or content pack.",
+    "@documentationUrl": "https://stardewvalleywiki.com/Modding:Modder_Guide/APIs/Translation",
+    "type": "object",
+
+    "properties": {
+        "$schema": {
+            "title": "Schema",
+            "description": "A reference to this JSON schema. Not part of the actual format, but useful for validation tools.",
+            "type": "string",
+            "const": "https://smapi.io/schemas/manifest.json"
+        }
+    },
+
+    "additionalProperties": {
+        "type": "string",
+        "@errorMessages": {
+            "type": "Invalid property. Translation files can only contain text property values."
+        }
+    }
+}