Added support for passing retention policies to the plugin

Updated copy for retention policy settings

Removed an extra parenthesis

Cleanup

Additional copy cleanup

Copy cleanup

octoprint_influxdb/__init__.py

@@ -159,6 +159,7 @@ def add_arg_if_exists(kwargsname, path, getter=self._settings.get):
 			if self.influx_db:
 				self.influx_kwargs = kwargs
 				self.influx_prefix = self._settings.get(['prefix']) or ''
+				self.influx_retention_policy = self._settings.get(['retention_policy']) or None
 
 		# start a new timer
 		if self.influx_db:
@@ -208,7 +209,7 @@ def influx_emit(self, measurement, fields, extra_tags={}):
 			'fields': fields,
 		}
 		try:
-			self.influx_db.write_points([point])
+			self.influx_db.write_points([point], retention_policy=self.influx_retention_policy)
 		except Exception:
 			# we were dropped! try to reconnect
 			self.influx_flash_exception("Disconnected from InfluxDB. Attempting to reconnect.")
@@ -320,7 +321,7 @@ def get_settings_defaults(self):
 			hostcustom='octoprint',
 			username=None,
 			password=None,
-
+			retention_policy=None,
 			interval=1,
 		)
 

octoprint_influxdb/templates/influxdb_settings.jinja2

@@ -35,14 +35,24 @@
 
     <br>
 
+    <label class="control-label">{{ _('Retention Policy') }}</label>
+    <div class="controls">
+      <input type="text" class="input-medium" placeholder="None" data-bind="value: settings.plugins.influxdb.retention_policy">
+      <span class="help-block">
+        {{ _('If not specified the default policy of None will be used. The retention policy must be created on the database before setting this value.') }}
+      </span>
+    </div>
+
+    <br>
+
     <label class="control-label">{{ _('Prefix') }}</label>
     <div class="controls">
       <input type="text" class="input-medium" placeholder="(no prefix)" data-bind="value: settings.plugins.influxdb.prefix">
       <span class="help-block">
         {{ _('Measurement names will be prefixed by this string. Helpful when sharing a database.') }}
       </span>
     </div>
-
+    
     <label class="control-label">{{ _('%(host)s Tag', host='<tt>host</tt>') }}</label>
     <div class="controls">
       <label class="radio">