discourse-legacy_links/plugin.rb

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2024-09-06 14:06:57 +00:00
# plugins/discourse-legacy_links/plugin.rb
# frozen_string_literal: true
# name: discourse-legacy_links
# about: A plugin to handle legacy Gossamer Forums URLs
# version: 0.2
# authors: saint@federated.computer
# url: https://gitea.federated.computer/saint/discourse-legacy_links.git
# require 'digest'
# enabled_site_setting :discourse_legacy_routing_enabled
# after_initialize do
after_initialize do
module ::DiscourseCustomRouting
class Engine < ::Rails::Engine
engine_name "discourse_custom_routing"
isolate_namespace DiscourseCustomRouting
end
# Define the custom controller
class CustomPostController < ::ApplicationController
# Match URLs that include a post_id at the end or query parameter
def index
post_id = extract_post_id_from_request
if post_id
post = find_post_by_custom_field(post_id)
if post
# Redirect to the post URL if found
redirect_to post_url(post)
else
# Return 404 if the post is not found
render plain: 'Post not found', status: 404
end
else
# Handle cases where the post_id cannot be extracted
render plain: 'Invalid URL', status: 400
end
end
private
def extract_post_id_from_request
# Extract post_id from various URL formats
if params[:post_id]
params[:post_id].to_i
elsif request.path.match(%r{/forum/[^/]+/P(\d+)/})
$1.to_i
elsif request.query_string.match(/post=(\d+)/)
$1.to_i
elsif request.query_string.match(/parent_post_id=(\d+)/)
$1.to_i
else
nil
end
end
def find_post_by_custom_field(post_id)
# Find the post with the specified custom field
Post.joins(:topic_custom_fields)
.where(topic_custom_fields: { name: 'original_gossamer_id', value: post_id.to_s })
.first
end
end
# Register custom routes
Discourse::Application.routes.append do
get '/forum/*path' => 'custom_post#index'
end
end
end