Make config configurable (#91)

* make config configurable

* move print to more fitting place

config/sample.ini

@@ -0,0 +1,5 @@
+[ACTINIA]
+HOST = https://actinia-dev.mundialis.de
+PORT = 443
+USER = openeo
+PASSWORD = EeMob0la

src/openeo_grass_gis_driver/actinia_processing/config.py

@@ -1,20 +1,26 @@
 # -*- coding: utf-8 -*-
 import os
+import configparser
+from pathlib import Path
 
 __license__ = "Apache License, Version 2.0"
-__author__ = "Sören Gebbert"
-__copyright__ = "Copyright 2018, Sören Gebbert, mundialis"
-__maintainer__ = "Soeren Gebbert"
-__email__ = "[email protected]"
+__author__ = "Sören Gebbert, Carmen Tawalika"
+__copyright__ = "Copyright 2018-2021, Sören Gebbert, mundialis"
+__maintainer__ = "mundialis"
 
 
-class Config:
-    # Settings for docker swarm image
+# config can be overwritten by mounting *.ini files into folders inside
+# the config folder.
+DEFAULT_CONFIG_PATH = "config"
+CONFIG_FILES = [str(f) for f in Path(
+    DEFAULT_CONFIG_PATH).glob('**/*.ini') if f.is_file()]
+GENERATED_CONFIG = DEFAULT_CONFIG_PATH + '/openeo-grassgis-driver.cfg'
+
+
+class ACTINIA:
     HOST = "https://actinia-dev.mundialis.de"
     PORT = 443
     LOCATIONS = ["nc_spm_08", "utm32n", "latlong_wgs84"]
-    # USER = "demouser"
-    # PASSWORD = "gu3st!pa55w0rd"
     USER = "openeo"
     PASSWORD = "EeMob0la"
     # The database file that stores the graphs
@@ -25,3 +31,51 @@ class Config:
     # The database file that stores the actinia jobs
     ACTINIA_JOB_DB = "%s/.actinia_job_db_file.sqlite" % os.environ["HOME"]
     SECRET_KEY = "jaNguzeef4seiv5shahchimoo8teiLah"
+
+
+class Configfile:
+
+    def __init__(self):
+        """
+        This class will overwrite the config classes above when config files
+        named DEFAULT_CONFIG_PATH/**/*.ini exist.
+        On first import of the module it is initialized.
+        """
+
+        config = configparser.ConfigParser()
+        print("Loading config files: " + str(CONFIG_FILES) + " ...")
+        config.read(CONFIG_FILES)
+
+        if len(config) <= 1:
+            print("Could not find any config file, using default values.")
+            return
+
+        with open(GENERATED_CONFIG, 'w') as configfile:
+            config.write(configfile)
+        print("Configuration written to " + GENERATED_CONFIG)
+
+        # CONFIG
+        if config.has_section("ACTINIA"):
+            if config.has_option("ACTINIA", "HOST"):
+                ACTINIA.HOST = config.get("ACTINIA", "HOST")
+            if config.has_option("ACTINIA", "PORT"):
+                ACTINIA.PORT = config.get("ACTINIA", "PORT")
+            if config.has_option("ACTINIA", "LOCATIONS"):
+                ACTINIA.LOCATIONS = config.get("ACTINIA", "LOCATIONS")
+            if config.has_option("ACTINIA", "USER"):
+                ACTINIA.USER = config.get("ACTINIA", "USER")
+            if config.has_option("ACTINIA", "PASSWORD"):
+                ACTINIA.PASSWORD = config.get("ACTINIA", "PASSWORD")
+            if config.has_option("ACTINIA", "GRAPH_DB"):
+                ACTINIA.GRAPH_DB = config.get("ACTINIA", "GRAPH_DB")
+            if config.has_option("ACTINIA", "TOKEN_DB"):
+                ACTINIA.TOKEN_DB = config.get("ACTINIA", "TOKEN_DB")
+            if config.has_option("ACTINIA", "ACTINIA_JOB_DB"):
+                ACTINIA.ACTINIA_JOB_DB = config.get(
+                    "ACTINIA", "ACTINIA_JOB_DB")
+            if config.has_option("ACTINIA", "SECRET_KEY"):
+                ACTINIA.SECRET_KEY = config.get("ACTINIA", "SECRET_KEY")
+
+
+init = Configfile()
+Config = ACTINIA