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core-20261030T220507Z-61e4558d889f Hinzugefügt: 31.10.2026, 00:29 · Erstellt: 30.10.2026, 23:05

i18n.rs Hinzugefügt: Datum nicht erfasst 12,0 KB · 248 Zeilen

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1//! Data-driven translations. The language list (`i18n/languages.json`) and all catalogs

2//! are data files: the Core reads them from the bundled UI assets (core, diagnostics,

3//! license) or from a module directory (`ui/i18n/<language>.json`) and injects them into

4//! the windows. Native texts (dialog titles, OS prompts) use the same core catalogs.

6use serde_json::{json, Map, Value};

7use std::collections::BTreeMap;

8use std::path::Path;

10#[derive(Clone, Debug)]

11pub struct LanguageInfo {

12 pub code: String,

13 pub raw: Value,

14}

16#[derive(Clone, Debug, Default)]

17pub struct I18n {

18 pub manifest: Value,

19 pub languages: Vec<LanguageInfo>,

20 pub default_language: String,

21 pub fallback_language: String,

22 pub core: BTreeMap<String, Map<String, Value>>,

23 pub diagnostics: BTreeMap<String, Map<String, Value>>,

24 pub license: BTreeMap<String, Map<String, Value>>,

25}

27fn valid_code(code: &str) -> bool {

28 let mut parts = code.splitn(2, '-');

29 let base = parts.next().unwrap_or("");

30 (2..=3).contains(&base.len())

31 && base.chars().all(|c| c.is_ascii_lowercase())

32 && parts.next().map(|rest| !rest.is_empty() && rest.chars().all(|c| c.is_ascii_alphanumeric())).unwrap_or(true)

33}

35impl I18n {

36 /// `read` returns the bytes of a bundled UI asset path such as `i18n/core/cs.json`.

37 pub fn load(read: impl Fn(&str) -> Option<Vec<u8>>) -> Self {

38 let parse = |path: &str| -> Option<Value> { read(path).and_then(|bytes| serde_json::from_slice(&bytes).ok()) };

        let manifest = parse("i18n/languages.json").unwrap_or_else(|| json!({ "defaultLanguage": "cs", "fallbackLanguage": "en", "languages": [] }));

40 let mut i18n = I18n { manifest: manifest.clone(), ..Default::default() };

41 for entry in manifest.get("languages").and_then(Value::as_array).cloned().unwrap_or_default() {

42 let Some(code) = entry.get("code").and_then(Value::as_str).map(str::to_string) else { continue };

43 if !valid_code(&code) {

44 continue;

45 }

46 // A regional variant (`"parent": "de"`) may ship without its own catalog and inherits.

47 let parent = entry.get("parent").and_then(Value::as_str).filter(|p| i18n.core.contains_key(*p));

48 let core = match parse(&format!("i18n/core/{code}.json")) {

49 Some(Value::Object(core)) => core,

50 _ if parent.is_some() => Map::new(),

51 _ => continue,

52 };

53 i18n.core.insert(code.clone(), core);

54 if let Some(Value::Object(diag)) = parse(&format!("i18n/diagnostics/{code}.json")) {

55 i18n.diagnostics.insert(code.clone(), diag);

56 }

57 if let Some(Value::Object(license)) = parse(&format!("i18n/license/{code}.json")) {

58 i18n.license.insert(code.clone(), license);

59 }

60 i18n.languages.push(LanguageInfo { code, raw: entry });

61 }

62 let pick = |key: &str, fallback: &str| -> String {

            manifest.get(key).and_then(Value::as_str).filter(|c| i18n.core.contains_key(*c)).unwrap_or(fallback).to_string()

64 };

        i18n.default_language = pick("defaultLanguage", i18n.languages.first().map(|l| l.code.as_str()).unwrap_or("cs"));

66 i18n.fallback_language = pick("fallbackLanguage", &i18n.default_language.clone());

67 i18n

68 }

70 pub fn codes(&self) -> Vec<String> {

71 self.languages.iter().map(|l| l.code.clone()).collect()

72 }

74 pub fn languages_json(&self) -> Value {

75 Value::Array(self.languages.iter().map(|l| l.raw.clone()).collect())

76 }

78 /// Parent language of a regional variant (`de-at` → `de`).

79 pub fn parent(&self, language: &str) -> Option<String> {

80 let entry = self.languages.iter().find(|l| l.code == language)?;

        entry.raw.get("parent").and_then(Value::as_str).map(str::to_string).or_else(|| language.split_once('-').map(|(base, _)| base.to_string()))

82 }

84 /// Lookup order for a language: itself, its parent, the fallback language, Czech.

85 pub fn chain(&self, language: &str) -> Vec<String> {

86 let mut chain = vec![language.to_string()];

87 chain.extend(self.parent(language));

88 chain.push(self.fallback_language.clone());

89 chain.push("cs".into());

90 chain.dedup();

91 chain

92 }

94 /// Native text from the core catalogs with language → parent → fallback language → Czech → key.

95 pub fn t(&self, language: &str, key: &str) -> String {

96 self.chain(language)

97 .iter()

98 .find_map(|code| self.core.get(code).and_then(|c| c.get(key)).and_then(Value::as_str))

99 .unwrap_or(key)

100 .to_string()

101 }

102

103 fn chrome_catalogs(&self) -> Value {

104 let mut chrome = Map::new();

105 for (code, catalog) in &self.core {

106

            let entries: Map<String, Value> = catalog.iter().filter(|(k, _)| k.starts_with("chrome.")).map(|(k, v)| (k.clone(), v.clone())).collect();

107 chrome.insert(code.clone(), Value::Object(entries));

108 }

109 Value::Object(chrome)

110 }

111

112 fn manifest_for_windows(&self) -> Value {

113 json!({

114 "defaultLanguage": self.default_language,

115 "fallbackLanguage": self.fallback_language,

116 "languages": self.languages_json()

117 })

118 }

119

120 pub fn main_window_data(&self) -> Value {

121 json!({

122 "manifest": self.manifest_for_windows(),

123 "catalogs": { "core": self.core, "diagnostics": self.diagnostics, "chrome": self.chrome_catalogs() }

124 })

125 }

126

127 pub fn license_window_data(&self) -> Value {

128

        json!({ "manifest": self.manifest_for_windows(), "catalogs": { "license": self.license, "chrome": self.chrome_catalogs() } })

129 }

130

131 /// Catalogs of one module (`<module root>/ui/i18n/*.json`, any valid language code).

132 pub fn module_window_data(&self, module_root: &Path) -> Value {

133 let mut module = Map::new();

134 let dir = module_root.join("ui").join("i18n");

135 if let Ok(entries) = std::fs::read_dir(&dir) {

136 for entry in entries.flatten() {

137 let name = entry.file_name().to_string_lossy().to_string();

138 let Some(code) = name.strip_suffix(".json") else { continue };

139 if !valid_code(code) {

140 continue;

141 }

142 if let Ok(meta) = entry.metadata() {

143 if !meta.is_file() || meta.len() > 4 * 1024 * 1024 {

144 continue;

145 }

146 }

147

                if let Ok(Value::Object(catalog)) = std::fs::read(entry.path()).map_err(|_| ()).and_then(|b| serde_json::from_slice(&b).map_err(|_| ())) {

148 module.insert(code.to_string(), Value::Object(catalog));

149 }

150 }

151 }

152

        json!({ "manifest": self.manifest_for_windows(), "catalogs": { "module": module, "chrome": self.chrome_catalogs() } })

153 }

154}

155

156#[cfg(test)]

157mod tests {

158 use super::*;

159

160 #[test]

161 fn languages_come_from_manifest_and_existing_catalogs() {

162 let files: std::collections::HashMap<&str, &str> = [

163

            ("i18n/languages.json", r#"{"defaultLanguage":"cs","fallbackLanguage":"en","languages":[{"code":"cs","name":"Čeština"},{"code":"en","name":"English"},{"code":"sk","name":"Slovenčina"},{"code":"../x","name":"bad"}]}"#),

164 ("i18n/core/cs.json", r#"{"a":"A-cs","chrome.collapse":"Sbalit"}"#),

165 ("i18n/core/en.json", r#"{"a":"A-en","b":"B-en"}"#),

166 ("i18n/core/sk.json", r#"{"a":"A-sk"}"#),

167 ]

168 .into_iter()

169 .collect();

170 let i18n = I18n::load(|path| files.get(path).map(|s| s.as_bytes().to_vec()));

171 assert_eq!(i18n.codes(), vec!["cs", "en", "sk"]);

172 assert_eq!(i18n.t("sk", "a"), "A-sk");

173 assert_eq!(i18n.t("sk", "b"), "B-en");

174 assert_eq!(i18n.t("xx", "missing"), "missing");

175 assert_eq!(i18n.main_window_data()["catalogs"]["chrome"]["cs"]["chrome.collapse"], "Sbalit");

176 }

177

178 #[test]

179 fn regional_variants_inherit_from_parent() {

180 let files: std::collections::HashMap<&str, &str> = [

181

            ("i18n/languages.json", r#"{"defaultLanguage":"cs","fallbackLanguage":"en","languages":[{"code":"cs"},{"code":"en"},{"code":"de"},{"code":"de-at","parent":"de"},{"code":"xx-yy","parent":"zz"}]}"#),

182 ("i18n/core/cs.json", r#"{"a":"A-cs","c":"C-cs"}"#),

183 ("i18n/core/en.json", r#"{"a":"A-en","b":"B-en"}"#),

184 ("i18n/core/de.json", r#"{"a":"A-de"}"#),

185 ]

186 .into_iter()

187 .collect();

188 let i18n = I18n::load(|path| files.get(path).map(|s| s.as_bytes().to_vec()));

189 assert_eq!(i18n.codes(), vec!["cs", "en", "de", "de-at"]);

190 assert_eq!(i18n.t("de-at", "a"), "A-de");

191 assert_eq!(i18n.t("de-at", "b"), "B-en");

192 assert_eq!(i18n.t("de-at", "c"), "C-cs");

193 assert_eq!(i18n.chain("de-at"), vec!["de-at", "de", "en", "cs"]);

194 }

195

196 fn placeholders(text: &str) -> std::collections::BTreeSet<String> {

197 regex::Regex::new(r"\{[A-Za-z0-9_]+\}").unwrap().find_iter(text).map(|m| m.as_str().to_string()).collect()

198 }

199

200 /// Every bundled catalog of every language has exactly the English keys, the same

201 /// placeholders and no empty text. The license and the safety guidance stay in

202 /// Czech, German and English only.

203 #[test]

204 fn bundled_catalogs_are_complete() {

205 let root = std::path::Path::new(env!("CARGO_MANIFEST_DIR")).join("..").join("src");

206

        let read = |path: &std::path::Path| -> Map<String, Value> { serde_json::from_slice(&std::fs::read(path).unwrap_or_else(|e| panic!("{}: {e}", path.display()))).unwrap_or_else(|e| panic!("{}: {e}", path.display())) };

207

        let manifest: Value = serde_json::from_slice(&std::fs::read(root.join("ui/i18n/languages.json")).unwrap()).unwrap();

208 let languages: Vec<&Value> = manifest["languages"].as_array().unwrap().iter().collect();

209 let mut dirs = vec![root.join("ui/i18n/core"), root.join("ui/i18n/diagnostics")];

210 for module in std::fs::read_dir(root.join("modules")).unwrap().flatten().filter(|e| e.path().is_dir()) {

211 for version in std::fs::read_dir(module.path()).unwrap().flatten() {

212 let dir = version.path().join("ui").join("i18n");

213 if dir.join("en.json").exists() {

214 dirs.push(dir);

215 }

216 }

217 }

218 let mut problems = Vec::new();

219 for dir in &dirs {

220 let english = read(&dir.join("en.json"));

221 for language in &languages {

222 let code = language["code"].as_str().unwrap();

223 let path = dir.join(format!("{code}.json"));

224

                if code == "en" || (code == "cs" && !path.exists()) || (language.get("parent").is_some() && !path.exists()) {

225 continue;

226 }

227 if !path.exists() {

228 problems.push(format!("{}: missing", path.display()));

229 continue;

230 }

231 let catalog = read(&path);

232 for (key, source) in &english {

233 match catalog.get(key).and_then(Value::as_str) {

234 None => problems.push(format!("{}: missing key {key:?}", path.display())),

235 Some("") => problems.push(format!("{}: empty {key:?}", path.display())),

236

                        Some(text) if placeholders(text) != placeholders(source.as_str().unwrap_or("")) => problems.push(format!("{}: placeholders differ in {key:?}", path.display())),

237 _ => {}

238 }

239 }

240

                problems.extend(catalog.keys().filter(|k| !english.contains_key(*k)).map(|k| format!("{}: unknown key {k:?}", path.display())));

241 }

242 }

243

        let mut license: Vec<String> = std::fs::read_dir(root.join("ui/i18n/license")).unwrap().flatten().map(|e| e.file_name().to_string_lossy().to_string()).collect();

244 license.sort();

245

        assert_eq!(license, vec!["cs.json", "de.json", "en.json"], "the license and safety guidance are not translated");

246

        assert!(problems.is_empty(), "{} catalog problems:\n{}", problems.len(), problems.iter().take(40).cloned().collect::<Vec<_>>().join("\n"));

247 }

248}

249

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