Plots2: Add redirect tag feature by page name

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🤔 What you will need to know.

Nothing. This issue is meant to welcome you to Open Source :) We are happy to walk you through the process.

We have a redirect system that uses tags -- read more at https://publiclab.org/wiki/power-tags -- but it requires tags to point at a "node id" like redirect:12345. This is hard to remember and kind of obscure -- so let's make it possible to use a page "slug" as well. Then you could redirect to the page at /wiki/openhour by using redirect:openhour.

📋 Step by Step

• [ ] 🙋 Claim this issue: Comment below. If someone else has claimed it, ask if they've opened a pull request already and if they're stuck -- maybe you can help them solve a problem or move it along!

• [ ] 📝 Update the file app/controllers/wiki_controller.rb in the plots2 repository (press the little pen Icon) and edit the line as shown below.

See this page for some help in taking your first steps!

Below is a "diff" showing in red (and a -) which lines to remove, and in green (and a +) which lines to add:

@@ -33,6 +33,14 @@ def show
         flash.now[:warning] = "Only moderators and admins see this page, as it is redirected to <a href='#{Node.find(@node.power_tag('redirect')).path}'>#{Node.find(@node.power_tag('redirect')).title}</a>.
         To remove the redirect, delete the tag beginning with 'redirect:'"
       end
+    elsif @node&.has_power_tag('redirect') && Node.where(slug: @node.power_tag('redirect')).exists?
+      if current_user.nil? || !current_user.can_moderate?
+        redirect_to Node.find_by(slug: @node.power_tag('redirect')).path
+        return
+      elsif current_user.can_moderate?
+        flash.now[:warning] = "Only moderators and admins see this page, as it is redirected to <a href='#{Node.find_by(slug: @node.power_tag('redirect')).path}'>#{Node.find_by(slug: @node.power_tag('redirect')).title}</a>.
+        To remove the redirect, delete the tag beginning with 'redirect:'"
+      end
     end

     if @node&.has_power_tag('abtest') && !Node.where(nid: @node.power_tag('abtest')).empty?

• [ ] 💾 Commit your changes

• [ ] 🔀 Start a Pull Request. There are two ways how you can start a pull request:

1. If you are familiar with the terminal or would like to learn it, here is a great tutorial on how to send a pull request using the terminal.

2. You can also edit files directly in your browser and open a pull request from there.

• [ ] 🏁 Done Ask in comments for a review :)

🤔❓ Questions?

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(This issue was created by First-Timers-Bot.)