Add search bar to digest page and search results page

[MirandaEcho]

Custom form search for digest page, with date pickers, region picker.

[benlk]

From discussion in https://innorg.slack.com/archives/G0W8T58CQ/p1581009729002400 regarding the mockup in that message:

• Sidebar on this page will be a widgetized sidebar, containing:
  • the signup form
  • the subscription management button
  • contact form
• FAQ button will link off to another page; can probably be expressed as part of the term meta description. See https://github.com/INN/umbrella-energynewsnetwork/issues/81
• Not using Link Roundups for this anymore, it's to be assumed that these are generic posts in a generic category

[benlk]

Known parts of this:

• [ ] category template
• [ ] search box
• [ ] instructions for creating/setting sidebar to be used on this category

[benlk]

For unknown reasons, creating a sidebar named "Digest Sidebar" in Theme Options > Layout > Sidebar Options, and saving that sidebar in the sidebar picker at Posts > Categories > "Digests" > edit > Archive Sidebar, results in that sidebar not being found by the elaborate fallback queue in sidebar.php, and as a result the sidebar is not output.

The value that is saved in that sidebar's term meta post is:

$ wp post meta list  615232
+---------+----------------+----------------+
| post_id | meta_key       | meta_value     |
+---------+----------------+----------------+
| 615232  | custom_sidebar | digest-sidebar |
+---------+----------------+----------------+

wp sidebar list shows that the sidebar ID is digest-sidebar with a Name of "Digest Sidebar".

If this isn't solveable, we can hardcode it later. 🤷‍♂

Back to the search query research.

[benlk]

A QA thing that may come up later: Right now these are checkboxes, so that we can search for digests in more than one region. But during testing, I haven't seen any in more than one region. Is it okay to leave these as checkboxes, or should we swap to radio inputs for this field?

[MirandaEcho]

Checkboxes are fine. Use case: I'm a user interested in stories just in the Midwest but also Nationally, and would like to see a list with both.

[benlk]

Should this be an AND or an OR search? Right now it's AND, and will only show articles at the overlap of the Midwest and National regions, which as of this morning are a total of 0 posts.

[MirandaEcho]

How complex is the switch?

[benlk]

~5 minutes to add 'relation' => 'OR', to an array.

[MirandaEcho]

Please go ahead with that, thanks @benlk !!

[benlk]

Present styles.

[benlk]

Date range.

[benlk]

Is this issue obsoleted by #86?

[MirandaEcho]

86 specifies adding it to the actual pages, if not done already.

[benlk]

The search form was added in PR #83, which is merged, but not yet deployed to https://usenergystage.wpengine.com/category/digest/