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| require 'bundler/inline' | |
| gemfile do | |
| source 'https://rubygems.org' | |
| gem 'rspec' | |
| end | |
| require 'rspec/autorun' | |
| class Scope | |
| include Enumerable | |
| def initialize(*segments) | |
| @segments = segments | |
| end | |
| def each(&) | |
| @segments.each(&) | |
| end | |
| def models | |
| select { |segment| segment.respond_to? :to_model } | |
| end | |
| def path | |
| map do |segment| | |
| if segment.respond_to? :to_param | |
| segment.to_param | |
| else | |
| segment.to_s | |
| end | |
| end.join("/").prepend("/") | |
| end | |
| def a(**attributes, &content) | |
| "<a #{attributes.map { |k, v| "#{k}=\"#{v}\"" }.join(" ")}>#{content&.call}</a>" | |
| end | |
| def show(*,**,&) | |
| path, content = segment(*,&) | |
| a(href: path, data_turbo_method: :get, **, &content) | |
| end | |
| def scope(*segments) | |
| Scope.new(*@segments, *segments) | |
| end | |
| def parent | |
| *segments, _ = @segments | |
| Scope.new(*segments) | |
| end | |
| protected | |
| def segment(*segments, &block) | |
| if segments.any? | |
| scope(*segments).segment(&block) | |
| else | |
| content = content(&block) || Proc.new { path } | |
| [ path, content ] | |
| end | |
| end | |
| def content(&block) | |
| Proc.new { | |
| if block.lambda? | |
| block.call models.last | |
| elsif block | |
| block.call *models | |
| end | |
| } if block | |
| end | |
| end | |
| def scope(*) | |
| Scope.new(*) | |
| end | |
| def show(*, **, &) = scope(*, **).show(&) | |
| class Blog < Struct.new(:id, :name) | |
| def to_param = id | |
| def to_model = self | |
| end | |
| class Post < Struct.new(:id, :title, :blog) | |
| def to_param = id | |
| def to_model = self | |
| end | |
| RSpec.describe "Links" do | |
| let(:blog) { Blog.new(1, "Bob Law's Law Blog") } | |
| let(:post) { Post.new(1, "Post", blog) } | |
| let(:posts) { scope(:blogs, blog, :posts) } | |
| let(:post_scope) { scope(:blogs, blog, :posts, post) } | |
| describe "post title link" do | |
| subject { posts.show(post, &:title) } | |
| it { is_expected.to eq %(<a href="/blogs/1/posts/1" data_turbo_method="get">Post</a>) } | |
| end | |
| describe "edit link with block content" do | |
| subject do | |
| posts.show(post, :edit) { |blog, post| "Open #{blog.name} - #{post.title}" } | |
| end | |
| it { is_expected.to eq %(<a href="/blogs/1/posts/1/edit" data_turbo_method="get">Open Bob Law's Law Blog - Post</a>) } | |
| end | |
| describe "preview link with block content" do | |
| subject do | |
| posts.show(post, :preview) { |blog, post| "Preview #{blog.name} - #{post.title}" } | |
| end | |
| it { is_expected.to eq %(<a href="/blogs/1/posts/1/preview" data_turbo_method="get">Preview Bob Law's Law Blog - Post</a>) } | |
| end | |
| describe "default show link with block content" do | |
| subject do | |
| post_scope.show { |blog, post| "#{blog.name} - #{post.title}" } | |
| end | |
| it { is_expected.to eq %(<a href="/blogs/1/posts/1" data_turbo_method="get">Bob Law's Law Blog - Post</a>) } | |
| end | |
| describe "link using title lambda" do | |
| subject { post_scope.show(class: "btn btn-primary", &:title) } | |
| it { is_expected.to eq %(<a href="/blogs/1/posts/1" data_turbo_method="get" class="btn btn-primary">Post</a>) } | |
| end | |
| describe "preview link using title lambda" do | |
| subject { post_scope.show(:preview, &:title) } | |
| it { is_expected.to eq %(<a href="/blogs/1/posts/1/preview" data_turbo_method="get">Post</a>) } | |
| end | |
| describe "parent link with custom block content" do | |
| subject { post_scope.parent.show { "#{_1.name} Posts" } } | |
| it { is_expected.to eq %(<a href="/blogs/1/posts" data_turbo_method="get">Bob Law's Law Blog Posts</a>) } | |
| end | |
| describe "parent link with no block" do | |
| subject { post_scope.parent.show } | |
| it { is_expected.to eq %(<a href="/blogs/1/posts" data_turbo_method="get">/blogs/1/posts</a>) } | |
| end | |
| end |
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