Update notification channel scanning

[nikodemas]

Hi @amotl,

I again felt the need of seeing in what dashboards different notification channels are used as previously described by me in #82, so I updated the code to satisfy my needs. However, there are some things worth mentioning:

• this only searches through alerts that were created before Grafana 8, because after this alerting stopped being tied to the panel/dashboard, so this information is not available anymore. The command doesn't break on occasions like this, it just doesn't return any information about the related panels.
• even then the structure of the alert information differs slightly between the dashboards, hence my update includes the sketchy if-elif
• if you still think that this is something useful for the grafana-wtf, I might add support for the search by the channel name. Currently you need to use channel uid and that is completely fine for me, but having the ability to search by channel name would make it a little bit more user-friendly

Let me know what you think!

[codecov]

Codecov Report

Attention: Patch coverage is 13.04348% with 20 lines in your changes missing coverage. Please review.

Project coverage is 86.20%. Comparing base (e01dcad) to head (df10c24).
Report is 1 commits behind head on main.

Files with missing lines	Patch %	Lines
grafana_wtf/core.py	14.28%	18 Missing ⚠️
grafana_wtf/commands.py	0.00%	2 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #163      +/-   ##
==========================================
- Coverage   87.52%   86.20%   -1.32%     
==========================================
  Files           9        9              
  Lines        1090     1109      +19     
==========================================
+ Hits          954      956       +2     
- Misses        136      153      +17     

Flag	Coverage Δ
unittests	86.20% <13.04%> (-1.32%)	⬇️

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[amotl]

Dear @nikodemas,

thanks a stack for submitting those improvements. I just added you as a member to the grafana-toolbox org, so you can operate better, and will merge your patch right away now that it doesn't fail on CI/GHA.

Adding functionality to search by channel name will be well received.

With kind regards,
Andreas.

[nikodemas]

Thank you!

Sure, I will add the functionality probably some time later this week. Please also let me know if you have any comments on my code.

Best regards,
Nikodemas