add confutil

README.md

@@ -1,12 +1,14 @@
 # utils
+Small tools needed to solve immediate tasks independently or as part of a project
 
-* [camsutil](https://git.hmp.today/pavel.muhortov/utils#camsutil)
-* [cronutil](https://git.hmp.today/pavel.muhortov/utils#cronutil)
-* [ffmpeger.py](https://git.hmp.today/pavel.muhortov/utils#ffmpeger-py)
-* [procutil.py](https://git.hmp.today/pavel.muhortov/utils#procutil-py)
-* [sendmail.py](https://git.hmp.today/pavel.muhortov/utils#sendmail-py)
+* [`camsutil`](https://git.hmp.today/pavel.muhortov/utils#camsutil)
+* [`cronutil`](https://git.hmp.today/pavel.muhortov/utils#cronutil)
+* [`confutil`.py](https://git.hmp.today/pavel.muhortov/utils#confutil-py)
+* [`ffmpeger`.py](https://git.hmp.today/pavel.muhortov/utils#ffmpeger-py)
+* [`procutil`.py](https://git.hmp.today/pavel.muhortov/utils#procutil-py)
+* [`sendmail`.py](https://git.hmp.today/pavel.muhortov/utils#sendmail-py)
 ____
-## camsutil
+## `camsutil`
 **Description:** Creation of a request to the camera API based on the prepared template  
 **Dependencies:** Python 3 (tested version 3.9.5)
 
@@ -48,7 +50,7 @@ with open('img.jpg', 'wb') as output:
 ```
 
 ____
-## cronutil
+## `cronutil`
 **Description:** Control wrapper for the [schedule](https://github.com/dbader/schedule) package  
 **Dependencies:** Python 3 (tested version 3.9.5)
 
@@ -87,7 +89,39 @@ cron.start()
 ```
 
 ____
-## ffmpeger.py
+## `confutil`.py
+**Description:** Parser of configs, arguments, parameters  
+**Dependencies:** Python 3 (tested version 3.9.5)  
+
+Example config to parse:
+```text
+[main]
+#   This block contains basic parameters
+
+
+[httpd]
+#   This block contains parameters for the http server
+
+# Address to which to bind listening
+#address=0.0.0.0;
+# Port to which to bind listening. Port below 1024 requires root privileges.
+port=8800;
+# Working directory (available to everyone)
+directory=www;
+```
+
+Example usage in Python:
+```Python
+from os import path
+from confutil import Parse
+
+conf = path.splitext(__file__)[0] + '.conf'
+if path.exists(conf):
+    print(Parse(parameters=conf, block='httpd'))
+```
+
+____
+## `ffmpeger`.py
 **Description:** FFmpeg management from Python  
 **Dependencies:** Python 3 (tested version 3.9.5), installed or downloaded ffmpeg, [procutil.py](https://git.hmp.today/pavel.muhortov/utils#procutil-py) in the same directory
 
@@ -120,7 +154,7 @@ FFmpeg.run(src='null, anull', preset='240p', fps=10)
 ```
 
 ____
-## procutil.py
+## `procutil`.py
 **Description:** Find a running process from Python  
 **Dependencies:** Python 3 (tested version 3.9.5)
 
@@ -152,7 +186,7 @@ if processes:
     for process in processes:
         print(process)
 ```
-## sendmail.py
+## `sendmail`.py
 **Description:** Sending email from Python  
 **Dependencies:** Python 3 (tested version 3.9.5)
 

confutil.py

@@ -0,0 +1,135 @@
+from argparse import ArgumentParser
+from os import path, sep
+
+
+class Parse:
+    """
+    Parser of configs, arguments, parameters
+    """
+    def __init__(self, parameters, block: str = None):
+        """
+        Object constructor
+        :param parameters: dictionary as "key":"value" or
+                            ArgumentParser class object or
+                            string path to the file or
+                            string as "var1=val1;var2=val2"
+        :param block: string name of target block from text
+        """
+        self.data = {}
+        if type(parameters) is dict:
+            self._dict2dict(parameters)
+        if type(parameters) is ArgumentParser:
+            self._dict2dict(self.argv2dict(parameters))
+        if type(parameters) is str:
+            if path.exists(parameters):
+                self._dict2dict(self.strs2dict(self.conf2strs(parameters), block))
+            else:
+                self._dict2dict(self.strs2dict(parameters, block))
+
+    def __str__(self):
+        """
+        Overrides method for print(object)
+        :return: string with contents of the object's dictionary
+        """
+        string = ''
+        for key, val in self.data.items():
+            string += str(type(val)) + ' ' + str(key) + ' = ' + str(val) + '\n'
+        return string
+
+    def _dict2dict(self, dictionary: dict):
+        """
+        Updates or adds dictionary data
+        :param dictionary: dictionary as "key":"value"
+        :return: None
+        """
+        self.data.update(dictionary)
+
+    def expand(self, store: str = None):
+        """
+        Expand dictionary "key":"name.conf" to dictionary "key":{subkey: subval}
+        :param store: string path to directory with name.conf
+        :return: expanded dictionary as "key":{subkey: subval}
+        """
+        for key in self.data:
+            if store:
+                config = store + sep + self.data[key]
+            else:
+                config = self.data[key]
+            with open(config) as file:
+                self.data[key] = Parse(file.read()).data
+        return self.data
+
+    @classmethod
+    def argv2dict(cls, parser: ArgumentParser):
+        """
+        Converts startup arguments to a dictionary
+        :param parser: argparse.ArgumentParser class object
+        :return: dictionary as "key":"value"
+        """
+        parser = ArgumentParser(add_help=False, parents=[parser])
+        return vars(parser.parse_args())
+
+    @classmethod
+    def conf2strs(cls, config: str):
+        """
+        Builds a dictionary from a file containing parameters
+        :param config: string path to the file
+        :return: string as "var1=val1;\nvar2=val2;"
+        """
+        with open(config) as file:
+            raw = file.read()
+            strs = ''
+            for line in raw.splitlines():
+                if not line.lstrip().startswith('#'):
+                    strs += line + '\n'
+            return strs
+
+    @classmethod
+    def strs2dict(cls, strings: str, blockname: str):
+        """
+        Builds a dictionary from a strings containing parameters
+        :param strings: string as "var1=val1;var2=val2;"
+        :param blockname: string name of target block from text
+        :return: dictionary as "key":"value"
+        """
+        dictionary = {}
+        if blockname:
+            strings = cls.block(blockname, strings)
+        for line in strings.replace('\n', ';').split(';'):
+            if not line.lstrip().startswith('#') and "=" in line:
+                dictionary[line.split('=')[0].strip()] = line.split('=')[1].strip().split(';')[0].strip()
+        return dictionary
+
+    @classmethod
+    def str2bool(cls, value: str):
+        """
+        Converts a string value to boolean
+        :param value: string containing "true" or "false", "yes" or "no", "1" or "0"
+        :return: bool True or False
+        """
+        return str(value).lower() in ("true", "yes", "1")
+
+    @classmethod
+    def block(cls, blockname: str, text: str):
+        """
+        Cuts a block of text between line [blockname] and line [next block] or EOF
+        :param blockname: string in [] after which the block starts
+        :param text: string of text from which the block is needed
+        :return: string of text between line [block name] and line [next block]
+        """
+        level = 1
+        save = False
+        result = ''
+        for line in text.splitlines():
+            if line.startswith('[') and blockname in line:
+                level = line.count('[')
+                save = True
+            elif line.startswith('[') and '['*level in line:
+                save = False
+            elif save:
+                result += line + '\n'
+        return result
+
+
+if __name__ == "__main__":
+    pass