Keywords enhancement - Boolean logic / regex

[vertigo220]

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Checklist

• [X] I made sure that there are no existing issues - open or closed - to which I could contribute my information.
• [X] I made sure that there are no existing discussions - open or closed - to which I could contribute my information.
• [X] I have read the FAQs inside the app (Menu -> About -> FAQs) and my problem isn't listed.
• [X] I have taken the time to fill in all the required details. I understand that the bug report will be dismissed otherwise.
• [X] This issue contains only one feature request.
• [X] I have read and understood the contribution guidelines.
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Feature description

The keywords feature is a great idea, and with some improvements can be very useful. As it is, though, it's too limited to be of much use, as blocking any SMS with a particular keyword may cause blocking one that shouldn't be blocked. To help ensure this doesn't happen, it should be improved to allow blocking only messages that contain e.g. WORD1 AND WORD2 but NOT WORD3, and it should allow regex usage. While more complex, it should even allow things such as WORD1 AND (WORD2 OR WORD3).

Why do you want this feature?

See above

Additional information

No response