[enh] Validate server side specific input html5 field

locales/en.json

@@ -146,6 +146,11 @@
     "config_missing_init_value": "Config panel question '{question}' should be initialize with a value during install or upgrade.",
     "config_no_panel": "No config panel found.",
     "config_unknown_filter_key": "The filter key '{filter_key}' is incorrect.",
+    "config_validate_color": "Should be a valid RGB hexadecimal color",
+    "config_validate_date": "Should be a valid date like in the format YYYY-MM-DD",
+    "config_validate_email": "Should be a valid email",
+    "config_validate_time": "Should be a valid time like XX:YY",
+    "config_validate_url": "Should be a valid web URL",
     "config_version_not_supported": "Config panel versions '{version}' are not supported.",
     "confirm_app_install_danger": "DANGER! This app is known to be still experimental (if not explicitly not working)! You should probably NOT install it unless you know what you are doing. NO SUPPORT will be provided if this app doesn't work or breaks your system... If you are willing to take that risk anyway, type '{answers}'",
     "confirm_app_install_thirdparty": "DANGER! This app is not part of YunoHost's app catalog. Installing third-party apps may compromise the integrity and security of your system. You should probably NOT install it unless you know what you are doing. NO SUPPORT will be provided if this app doesn't work or breaks your system... If you are willing to take that risk anyway, type '{answers}'",

src/yunohost/utils/config.py

@@ -388,6 +388,7 @@ class ConfigPanel:
 class Question(object):
     hide_user_input_in_prompt = False
     operation_logger = None
+    pattern = None
 
     def __init__(self, question, user_answers):
         self.name = question["name"]
@@ -396,7 +397,7 @@ class Question(object):
         self.current_value = question.get("current_value")
         self.optional = question.get("optional", False)
         self.choices = question.get("choices", [])
-        self.pattern = question.get("pattern")
+        self.pattern = question.get("pattern", self.pattern)
         self.ask = question.get("ask", {"en": self.name})
         self.help = question.get("help")
         self.value = user_answers.get(self.name)
@@ -536,6 +537,46 @@ class StringQuestion(Question):
     argument_type = "string"
     default_value = ""
 
+class EmailQuestion(StringQuestion):
+    pattern = {
+        "regexp": "^.+@.+",
+        "error": "config_validate_email"
+    }
+
+class URLQuestion(StringQuestion):
+    pattern = {
+        "regexp": "^https?://.*$",
+        "error": "config_validate_url"
+    }
+
+class DateQuestion(StringQuestion):
+    pattern = {
+        "regexp": "^\d{4}-\d\d-\d\d$",
+        "error": "config_validate_date"
+    }
+
+    def _prevalidate(self):
+        from datetime import datetime
+        super()._prevalidate()
+
+        if self.value not in [None, ""]:
+            try:
+                datetime.strptime(self.value, '%Y-%m-%d')
+            except ValueError:
+                raise YunohostValidationError("config_validate_date")
+
+class TimeQuestion(StringQuestion):
+    pattern = {
+        "regexp": "^(1[12]|0?\d):[0-5]\d$",
+        "error": "config_validate_time"
+    }
+
+class ColorQuestion(StringQuestion):
+    pattern = {
+        "regexp": "^#[ABCDEFabcdef\d]{3,6}$",
+        "error": "config_validate_color"
+    }
+
 
 class TagsQuestion(Question):
     argument_type = "tags"
@@ -880,11 +921,11 @@ ARGUMENTS_TYPE_PARSERS = {
     "text": StringQuestion,
     "select": StringQuestion,
     "tags": TagsQuestion,
-    "email": StringQuestion,
-    "url": StringQuestion,
-    "date": StringQuestion,
-    "time": StringQuestion,
-    "color": StringQuestion,
+    "email": EmailQuestion,
+    "url": URLQuestion,
+    "date": DateQuestion,
+    "time": TimeQuestion,
+    "color": ColorQuestion,
     "password": PasswordQuestion,
     "path": PathQuestion,
     "boolean": BooleanQuestion,