/skin/languages.js

Serving the language list as a JS file rather than JSON simplifies
a few things:

- cacheid management;
- having to manually delay the UI initialization until the JSON file
  is loaded.

static/skin/languages.js must be generated/updated manually by running
the static/generate_i18n_resources_list.py script.

static/generate_i18n_resources_list.py

@@ -17,15 +17,36 @@
 # along with this program. If not, see <http://www.gnu.org/licenses/>.
 
 from pathlib import Path
+import json
 
 script_path = Path(__file__)
 
 resource_file = script_path.parent / "i18n_resources_list.txt"
 translation_dir = script_path.parent / "skin/i18n"
+language_list_relpath = "skin/languages.js"
 
+def get_translation_info(filepath):
+    lang_code = Path(filepath).stem
+    with open(filepath, 'r', encoding="utf-8") as f:
+        content = json.load(f)
+        return lang_code, content["name"]
+
+language_list = []
 json_files = translation_dir.glob("*.json")
 with open(resource_file, 'w', encoding="utf-8") as f:
-    for json in sorted(translation_dir.glob("*.json")):
+    for i18n_file in sorted(translation_dir.glob("*.json")):
-        if json.name == "qqq.json":
+        if i18n_file.name == "qqq.json":
             continue
-        f.write(str(json.relative_to(script_path.parent)) + '\n')
+        print("Processing", i18n_file.name)
+        if i18n_file.name != "test.json":
+            language_list.append(get_translation_info(i18n_file))
+        f.write(str(i18n_file.relative_to(script_path.parent)) + '\n')
+
+language_list = [{name: code} for code, name in sorted(language_list)]
+language_list_jsobj_str = json.dumps(language_list,
+                                     indent=2,
+                                     ensure_ascii=False)
+print("Saving", language_list_relpath)
+fullpath = script_path.parent / language_list_relpath
+with open(fullpath, 'w', encoding="utf-8") as f:
+    f.write("const uiLanguages = " + language_list_jsobj_str)

static/resources_list.txt

@@ -15,6 +15,7 @@ skin/fonts/Roboto.ttf
 skin/search_results.css
 skin/blank.html
 skin/viewer.js
+skin/languages.js
 skin/mustache.min.js
 viewer.html
 templates/search_result.html

static/skin/i18n/ja.json

@@ -4,6 +4,7 @@
 			"MathXplore"
 		]
 	},
+	"name": "日本語",
 	"no-query": "クエリを指定していません。",
 	"400-page-title": "無効なリクエストです",
 	"400-page-heading": "無効なリクエストです",

static/skin/languages.js

@@ -0,0 +1,65 @@
+const uiLanguages = [
+  {
+    "বাংলা": "bn"
+  },
+  {
+    "Čeština": "cs"
+  },
+  {
+    "Deutsch": "de"
+  },
+  {
+    "English": "en"
+  },
+  {
+    "français": "fr"
+  },
+  {
+    "עברית": "he"
+  },
+  {
+    "Հայերեն": "hy"
+  },
+  {
+    "italiano": "it"
+  },
+  {
+    "日本語": "ja"
+  },
+  {
+    "한국어": "ko"
+  },
+  {
+    "kurdî": "ku-latn"
+  },
+  {
+    "македонски": "mk"
+  },
+  {
+    "ߒߞߏ": "nqo"
+  },
+  {
+    "Polski": "pl"
+  },
+  {
+    "русский": "ru"
+  },
+  {
+    "Sardu": "sc"
+  },
+  {
+    "slovenčina": "sk"
+  },
+  {
+    "Svenska": "sv"
+  },
+  {
+    "Türkçe": "tr"
+  },
+  {
+    "英语": "zh-hans"
+  },
+  {
+    "繁體中文": "zh-hant"
+  }
+]

test/server.cpp

@@ -140,6 +140,8 @@ const ResourceCollection resources200Uncompressible{
   { DYNAMIC_CONTENT, "/ROOT/skin/i18n/test.json" },
   // TODO: implement cache management of i18n resources
   //{ STATIC_CONTENT, "/ROOT/skin/i18n/test.json?cacheid=unknown" },
+  { DYNAMIC_CONTENT, "/ROOT/skin/languages.js" },
+  { STATIC_CONTENT, "/ROOT/skin/languages.js?cacheid=fe100348" },
 
   { ZIM_CONTENT,     "/ROOT/raw/zimfile/meta/Title" },
   { ZIM_CONTENT,     "/ROOT/raw/zimfile/meta/Description" },
@@ -977,6 +979,77 @@ TEST_F(ServerTest, 500)
   }
 }
 
+TEST_F(ServerTest, UserLanguageList)
+{
+  const auto r = zfs1_->GET("/ROOT/skin/languages.js");
+  EXPECT_EQ(r->body,
+R"EXPECTEDRESPONSE(const uiLanguages = [
+  {
+    "বাংলা": "bn"
+  },
+  {
+    "Čeština": "cs"
+  },
+  {
+    "Deutsch": "de"
+  },
+  {
+    "English": "en"
+  },
+  {
+    "français": "fr"
+  },
+  {
+    "עברית": "he"
+  },
+  {
+    "Հայերեն": "hy"
+  },
+  {
+    "italiano": "it"
+  },
+  {
+    "日本語": "ja"
+  },
+  {
+    "한국어": "ko"
+  },
+  {
+    "kurdî": "ku-latn"
+  },
+  {
+    "македонски": "mk"
+  },
+  {
+    "ߒߞߏ": "nqo"
+  },
+  {
+    "Polski": "pl"
+  },
+  {
+    "русский": "ru"
+  },
+  {
+    "Sardu": "sc"
+  },
+  {
+    "slovenčina": "sk"
+  },
+  {
+    "Svenska": "sv"
+  },
+  {
+    "Türkçe": "tr"
+  },
+  {
+    "英语": "zh-hans"
+  },
+  {
+    "繁體中文": "zh-hant"
+  }
+])EXPECTEDRESPONSE");
+}
+
 TEST_F(ServerTest, UserLanguageControl)
 {
   struct TestData