127 lines
5.4 KiB
Ruby
127 lines
5.4 KiB
Ruby
# plugins/discourse-legacy_links/plugin.rb
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# frozen_string_literal: true
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# name: discourse-legacy_links
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# about: A plugin to handle legacy Gossamer Forums URLs
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# version: 0.51
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# authors: saint@federated.computer
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# url: https://gitea.federated.computer/saint/discourse-legacy_links.git
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# enabled_site_setting :discourse_legacy_links_enabled
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after_initialize do
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module ::DiscourseLegacyLinks
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class Engine < ::Rails::Engine
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engine_name "discourse_legacy_links"
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isolate_namespace DiscourseLegacyLinks
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end
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end
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require_dependency "application_controller"
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class ::DiscourseLegacyLinks::LegacyLinksController < ::ApplicationController
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skip_before_action :check_xhr, only: [:index]
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def index2
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render plain: "Legacy Links from Discourse plugin! Current user: #{current_user&.username || 'Guest'}"
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end
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def index
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Rails.logger.info("DiscourseLegacyLinks: Handling request for URL: #{request.original_url}")
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post_id = extract_post_id_from_request
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if post_id
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Rails.logger.info("DiscourseLegacyLinks: Extracted post_id: #{post_id}")
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post = find_post_by_custom_field(post_id)
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if post
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Rails.logger.info("DiscourseLegacyLinks: Found matching post with id: #{post.id}")
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redirect_to_post(post)
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else
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Rails.logger.warn("DiscourseLegacyLinks: No matching post found for post_id: #{post_id}")
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render_not_found
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end
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else
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Rails.logger.warn("DiscourseLegacyLinks: Unable to extract post_id from request")
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render_bad_request
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end
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end
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private
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# Attempts to extract a post ID from various parts of the request
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def extract_post_id_from_request
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# post_id = params[:post_id].presence ||
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# request.path.match(%r{/forum/[^/]+/P(\d+)/?})&.[](1) ||
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# request.query_string.match(/post=(\d+)/)&.[](1) ||
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# request.query_string.match(/parent_post_id=(\d+)/)&.[](1)
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# post_id = params[:post_id].presence ||
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# request.path.match(%r{/P(\d+)/?})&. || # Matches URLs like /P40796/
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# request.path.match(%r{/forum/ || # Matches URLs like /forum/.../P6751045/
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# request.query_string.match(/post=(\d+)/)&. || # Matches URLs with ?post= in query string
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# request.query_string.match(/parent_post_id=(\d+)/)&. || # Matches URLs with ?parent_post_id= in query string
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# request.path.match(%r{/forum/.*?_P(\d+)/?})&. # Matches URLs like /forum/..._P6751045/
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# post_id = params[:post_id].presence ||
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# request.path.match(%r{/P(\d+)(?:/|$)})&. || # Matches URLs like /P40796/ or /P40796 (no trailing slash)
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# request.path.match(%r{/forum/.*_P(\d+)(?:/|$)})&. || # Matches URLs like /forum/.../P6751045/ or /forum/.../P6751045
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# request.query_string.match(/post=(\d+)/)&. || # Matches URLs with ?post= in query string
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# request.query_string.match(/parent_post_id=(\d+)/)&. # Matches URLs with ?parent_post_id= in query string
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post_id = params[:post_id].presence ||
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request.path.match(%r{/P(\d+)(?:/|$)})&.[](1) || # Matches URLs like /P40796/ or /P40796 (no trailing slash)
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request.path.match(%r{/forum/.*_P(\d+)(?:/|$)})&.[](1) || # Matches URLs like /forum/.../P6751045/ or /forum/.../P6751045
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request.query_string.match(/post=(\d+)/)&.[](1) || # Matches URLs with ?post= in query string
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request.query_string.match(/parent_post_id=(\d+)/)&.[](1) # Matches URLs with ?parent_post_id= in query string
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Rails.logger.info("DiscourseLegacyLinks: Extracted raw post_id: #{post_id || 'nil'}")
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post_id.to_i if post_id
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end
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# Finds a post by looking up the custom field on the associated topic
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def find_post_by_custom_field(post_id)
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Rails.logger.info("DiscourseLegacyLinks: Searching for post with original_gossamer_id: #{post_id}")
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post_custom_field = PostCustomField.find_by(name: 'original_gossamer_id', value: post_id.to_s)
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if post_custom_field
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post = post_custom_field.post
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Rails.logger.info("DiscourseLegacyLinks: Found post with id: #{post.id}")
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post
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else
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Rails.logger.warn("DiscourseLegacyLinks: No post found with original_gossamer_id: #{post_id}")
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nil
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end
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end
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# Redirects to the URL of the found post
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def redirect_to_post(post)
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Rails.logger.info("DiscourseLegacyLinks: Redirecting to post URL: #{post.url}")
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redirect_to post.url, status: :moved_permanently
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end
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# Renders a 404 Not Found response
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def render_not_found
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Rails.logger.info("DiscourseLegacyLinks: Rendering 404 Not Found")
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render plain: 'Post not found', status: :not_found
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end
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# Renders a 400 Bad Request response
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def render_bad_request
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Rails.logger.info("DiscourseLegacyLinks: Rendering 400 Bad Request")
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render plain: 'Invalid URL', status: :bad_request
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end
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end
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# Rails.logger.info("DiscourseLegacyLinks: initialistaion")
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DiscourseLegacyLinks::Engine.routes.draw do
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get "/forum" => "legacy_links#index"
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get "/forum/*path" => "legacy_links#index"
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end
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Discourse::Application.routes.append do
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mount ::DiscourseLegacyLinks::Engine, at: "/"
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end
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end
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