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self_host/LibreTranslate/libretranslate/locales.py

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+import json
+import os
+from functools import lru_cache
+
+from flask_babel import gettext as _
+from flask_babel import lazy_gettext as _lazy
+from markupsafe import Markup, escape
+
+
+@lru_cache(maxsize=None)
+def get_available_locales(only_reviewed=True, sort_by_name=False):
+    locales_dir = os.path.join(os.path.dirname(__file__), 'locales')
+    dirs = [os.path.join(locales_dir, d) for d in os.listdir(locales_dir)]
+
+    res = [{'code': 'en', 'name': 'English', 'reviewed': True}]
+
+    for d in dirs:
+        if d == 'en':
+            continue
+
+        meta_file = os.path.join(d, 'meta.json')
+        if os.path.isdir(os.path.join(d, 'LC_MESSAGES')) and os.path.isfile(meta_file):
+            try:
+                with open(meta_file) as f:
+                    j = json.loads(f.read())
+            except Exception as e:
+                print(e)
+                continue
+
+            if j.get('reviewed') or not only_reviewed:
+                res.append({'code': os.path.basename(d), 'name': j.get('name', ''), 'reviewed': j.get('reviewed', False)})
+
+    if sort_by_name:
+        res.sort(key=lambda s: s['name'])
+
+    return res
+
+@lru_cache(maxsize=None)
+def get_available_locale_codes(only_reviewed=True):
+    return [l['code'] for l in get_available_locales(only_reviewed=only_reviewed)]
+
+@lru_cache(maxsize=None)
+def get_alternate_locale_links():
+    tmpl = os.environ.get("LT_LOCALE_LINK_TEMPLATE")
+    if tmpl is None:
+        return []
+
+    locales = get_available_locale_codes()
+    result = []
+    for l in locales:
+        link = tmpl.replace("{LANG}", l)
+        if l == 'en':
+            link = link.replace("en.", "")
+        result.append({ 'link': link,'lang': l })
+    return result
+
+# Javascript code should use _e instead of _
+def gettext_escaped(text, **variables):
+    return json.dumps(_(text, **variables))
+
+# HTML should be escaped using _h instead of _
+def gettext_html(text, **variables):
+    # Translate text without args
+    s = str(escape(_(text)))
+
+    v = {}
+    if variables:
+        for k in variables:
+            if hasattr(variables[k], 'unescape'):
+                v[k] = variables[k].unescape()
+            else:
+                v[k] = Markup(variables[k])
+
+    # Variables are assumed to be already escaped and thus safe
+    return Markup(s if not v else s % v)
+
+def swag_eval(swag, func):
+    # Traverse the swag spec structure
+    # and call func on summary and description keys
+    for k in swag:
+        if k in ['summary', 'description'] and isinstance(swag[k], str) and swag[k] != "":
+            swag[k] = func(swag[k])
+        elif k == 'tags' and isinstance(swag[k], list):
+            swag[k] = [func(v) for v in swag[k]]
+        elif isinstance(swag[k], dict):
+            swag_eval(swag[k], func)
+        elif isinstance(swag[k], list) and k != 'consumes':
+            for i in swag[k]:
+                if isinstance(i, str):
+                    func(i)
+                elif isinstance(i, dict):
+                    swag_eval(i, func)
+
+    return swag
+
+def lazy_swag(swag):
+    return swag_eval(swag, _lazy)