Updated gmail with master

README.md

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+## Purpose
+This is a script that connects to Google's Gmail Service through its API. Collects a select set of emails. Then based on the contents of these emails. Sends LINE message Notifications. This could be modified to send messages to other services, Discord, Telegram and more.
+
+## Package Installation
+
+If you are not interested in using the line_notify module. Remove it before using pip.
+
+```
+pip3 install -r requirements.txt
+```
+
+## Create some required files.
+
+### constants.py
+Give these constants slightly more memorable / understandable names.
+This file simplifies the management when processing emails from several different sources.
+```python
+FROM_1 = "local@domain"
+FROM_2 = "local@domain2"
+
+SUB_1 = "Subject Line"
+SUB_2 = "Subject Line"
+
+SUBJECTS = [SUB_1, SUB_2]
+```
+
+### secrets.py
+This file is where you might keep some of your secrets. Though I would probably recommend that you move these to being environment variables instead.  
+**Note**: You should have this file listed in your .gitignore file. It should not be uploaded to GitHub.
+
+```python
+SEARCH_STRING = "GMail search String"
+
+# Notifier laben ID
+LABEL_ID = "Gmail Label ID String"
+
+LINE_TOKEN = "My Secret Token for LINE"
+
+NAME = "A Name"
+```
+## Running the script
+If you found this code first on github, I would direct you to [this article series.](https://dev.to/basman/connecting-to-gmail-api-with-python-546b) This will walk you through setting things up with Google.
+
+After going to the Google Quick start. You should have downloaded your `credentials.json` file. Run the gmail-sample.py 
+### First Run
+This will confirm that you are connecting to gmail successfully. If you do not see a list of labels. Work through the google trouble shooting.
+
+If successful delete the following code:
+```python
+# Stage 1 Check Connection
+list_labels_on_setup(service)
+sys.exit(0)
+# Delete from service = get_service() to this line
+```
+### Second Run
+In the code you will need to set the varible `name` to some label name you wish to use.  
+Then run the script. This will report the label_id that google assigned to this new label. For simplicity, don't manually create the label.  
+Add the label_id to the secrets.py file.
+
+Delete the next section of code:
+```python
+# Stage 2 Create New Label
+  if secrets.LABEL_ID == "":
+      print("We are creating a new label.")
+      # Replace "" with the label name you wish to use.
+      name = ""
+      if len(name) == 0:
+          print("You have not yet set name See 'name = ""' in the code above")
+          print("Do that now and run the script again")
+          sys.exit(0)
+      new_label = define_label(name)
+      new_label = add_label_to_gmail(service, new_label, logger)
+      print(f"Your new label ID is: {get_new_label_id(new_label)}")
+      print("Set this in secrets.py")
+      sys.exit(0)
+  # Delete from service = get_service() to this line
+```
+
+At this point you should have a working sample code.
+
+## Customising the script.
+You will need to update the code in the following section:
+```python
+if notifier == "NOTE1":
+    logger.debug("Note1")
+    # Your custom code goes here. Bot / Line
+    processed = True
+elif notifier == "NOTE2":
+    logger.debug("Note2")
+    # Your custom code goes here. Bot / Line
+    processed = True
+```
+If you are confused. Take a look at gmail.py which is my current working implementation.
+
+## Automating Script Execution
+You can either use good old Cron or systemd.
+I have included a copy of the two files for systemd which should be located in the `/etc/systemd/system/` directory on your system.  
+You will need to modify the path details and the timers to your own needs.

constants.py

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+# -*- coding: utf-8 -*-
+"""
+"""
+
+
+ENTER = "に入室しました"
+LEAVE = "に退室しました"
+
+FROM_BUS = "[email protected]"
+FROM_KIDZDUO = "[email protected]"
+FROM_GATE = "キッズセキュリティ ミマモルメ <[email protected]>"
+
+BUS_SUB = "エキッズ"
+KIDZDUO_SUB = "入退室情報のお知らせ"
+GATE_SUB = "【キッズセキュリティミマモルメ】通過のお知らせ"
+
+SUBJECTS = [BUS_SUB, KIDZDUO_SUB, GATE_SUB]