[Feature Request]: Adding fields based on paths

[mm12]

Checklist

• I am using an up-to-date version.
• I have read the documentation.
• I have searched existing issues.

Description

Currently, there is a macro for adding tags based on folders. I believe a similar functionality to this would be extremely helpful. I have paths like:

• series-{some-series-name}/{page_number}_{total_pages}.ext
• creator-{artist_ident}/{source_ident}_{page_number}.ext
• creator-{artist}/{series-name}_{source-name}_{page_number}.ext
• creator-{artist}/{series-name}_{a-few-tags-comma-seperated}_{page_number}.ext

And I want to be able to import the information as fields.

Milestone: This should be added before searching by fields is added.

Solution

A macro similar to folders->tags that allows users to select items and add populate fields based on a template/regex. I suggest allowing full regex, ie:
Find: creator-(.+)\/abc(\d+)_(\d+)\..+ would match the 2nd example where the source ident is abc then some numbers.
Then, population could allow for editing of this, so that for example, source_ident ($2) can be formatted as a source url, such as example.com/abc/$2

Alternatives

Alternatively, being able to populate (not just add) fields via multi-select is possible. This is desirable and would be a great addition as well, however, adds unnecessary manual work.