Initial commitHEADmain

12 files changed, 225 insertions, 0 deletions

diff --git a/.ruby-version b/.ruby-version
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--- /dev/null
+++ b/.ruby-version
@@ -0,0 +1 @@
+2.7.4
diff --git a/Gemfile b/Gemfile
new file mode 100644
index 0000000..c2a2df8
--- /dev/null
+++ b/Gemfile
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+# frozen_string_literal: true
+
+source "https://rubygems.org"
+ruby "2.7.4"
+
+git_source(:github) {|repo_name| "https://github.com/#{repo_name}" }
+
+gem "rack", "~> 2.2"
+gem "puma", "~> 5.3"
+gem "rspec", "~> 3.10"
+gem "pry", "~> 0.14.1"
diff --git a/Gemfile.lock b/Gemfile.lock
new file mode 100644
index 0000000..ae0b60e
--- /dev/null
+++ b/Gemfile.lock
@@ -0,0 +1,41 @@
+GEM
+  remote: https://rubygems.org/
+  specs:
+    coderay (1.1.3)
+    diff-lcs (1.4.4)
+    method_source (1.0.0)
+    nio4r (2.5.7)
+    pry (0.14.1)
+      coderay (~> 1.1)
+      method_source (~> 1.0)
+    puma (5.3.2)
+      nio4r (~> 2.0)
+    rack (2.2.3)
+    rspec (3.10.0)
+      rspec-core (~> 3.10.0)
+      rspec-expectations (~> 3.10.0)
+      rspec-mocks (~> 3.10.0)
+    rspec-core (3.10.1)
+      rspec-support (~> 3.10.0)
+    rspec-expectations (3.10.1)
+      diff-lcs (>= 1.2.0, < 2.0)
+      rspec-support (~> 3.10.0)
+    rspec-mocks (3.10.2)
+      diff-lcs (>= 1.2.0, < 2.0)
+      rspec-support (~> 3.10.0)
+    rspec-support (3.10.2)
+
+PLATFORMS
+  ruby
+
+DEPENDENCIES
+  pry (~> 0.14.1)
+  puma (~> 5.3)
+  rack (~> 2.2)
+  rspec (~> 3.10)
+
+RUBY VERSION
+   ruby 2.7.4p191
+
+BUNDLED WITH
+   2.1.4
diff --git a/Procfile b/Procfile
new file mode 100644
index 0000000..c3936b2
--- /dev/null
+++ b/Procfile
@@ -0,0 +1 @@
+web: bundle exec rackup -p $PORT
diff --git a/app/application.rb b/app/application.rb
new file mode 100644
index 0000000..595ff5b
--- /dev/null
+++ b/app/application.rb
@@ -0,0 +1,21 @@
+require './lib/router'
+require './app/controllers/home_controller'
+
+class Application
+  def initialize
+    @router = Router.new
+  end
+
+  attr_reader :router
+
+  def home_controller
+    HomeController.new
+  end
+
+  def call(env)
+    router.get("/") do |params|
+      home_controller.index(params)
+    end
+    router.call(env)
+  end
+end
diff --git a/app/controllers/application_controller.rb b/app/controllers/application_controller.rb
new file mode 100644
index 0000000..e1b2210
--- /dev/null
+++ b/app/controllers/application_controller.rb
@@ -0,0 +1,11 @@
+class ApplicationController
+  def render(action_name)
+    html = File.open("./app/views/#{controller_namespace.to_s}/#{action_name.to_s}.html.erb").read
+    template = ERB.new(html)
+    template.result(binding)
+  end
+
+  def controller_namespace
+    '/'
+  end
+end
diff --git a/app/controllers/home_controller.rb b/app/controllers/home_controller.rb
new file mode 100644
index 0000000..bb2a178
--- /dev/null
+++ b/app/controllers/home_controller.rb
@@ -0,0 +1,13 @@
+require 'erb'
+require "./app/controllers/application_controller"
+
+class HomeController < ApplicationController
+  def index(params)
+    @time = Time.now.to_s
+    render :index
+  end
+
+  def controller_namespace
+    :home
+  end
+end
diff --git a/app/views/home/index.html.erb b/app/views/home/index.html.erb
new file mode 100644
index 0000000..4f9f70f
--- /dev/null
+++ b/app/views/home/index.html.erb
@@ -0,0 +1 @@
+<h1><%= @time %></h1>
diff --git a/config.ru b/config.ru
new file mode 100644
index 0000000..1d1b31a
--- /dev/null
+++ b/config.ru
@@ -0,0 +1,4 @@
+require './app/application'
+
+use(Rack::Reloader, 0)
+run(Application.new)
diff --git a/lib/router.rb b/lib/router.rb
new file mode 100644
index 0000000..3597dfd
--- /dev/null
+++ b/lib/router.rb
@@ -0,0 +1,60 @@
+require 'pry'
+
+class Router
+  def initialize
+    @routes = []
+  end
+
+  def call(env)
+    path = env["REQUEST_PATH"]
+    method = env["REQUEST_METHOD"]
+    @routes.each do |route|
+      next if method != route[:method]
+      params = match_route(path, route[:path])
+      if params
+        return respond_html(route[:block].call(params))
+      end
+    end
+    respond_html("not found", status: 404)
+  end
+
+  def match_route(incoming_path, path)
+    params = {}
+    incoming_parts = incoming_path.split("/")
+    path_parts = path.split("/")
+
+    incoming_parts.each_with_index do |incoming_part, index|
+      path_part = path_parts[index]
+      if path_part&.start_with?(":")
+        params[path_part[1..-1]] = incoming_part
+      else
+        if path_part != incoming_part
+          return false
+        end
+      end
+    end
+    params
+  end
+
+  def get(path, &block)
+    @routes.push({ method: "GET", path: path, block: block })
+  end
+
+  def post(path, &block)
+    @routes.push({ method: "POST", path: path, block: block })
+  end
+
+  def put(path, &block)
+    @routes.push({ method: "PUT", path: path, block: block })
+  end
+
+  def delete(path, &block)
+    @routes.push({ method: "DELETE", path: path, block: block })
+  end
+
+  private
+
+  def respond_html(content, status: 200)
+    [status, {'Content-Type' => 'text/html'}, [content]]
+  end
+end
diff --git a/lib/spec.rb b/lib/spec.rb
new file mode 100644
index 0000000..d9c7d96
--- /dev/null
+++ b/lib/spec.rb
@@ -0,0 +1,45 @@
+class Spec
+  class << self
+    @@contexts = []
+
+    def context(description, &block)
+      @@contexts.push({ description: description, block: block })
+    end
+
+    def expect(value)
+      Result.new(value)
+    end
+
+    def eq(value)
+      Proc.new do |actual|
+        if actual != value
+          raise AssertionError.new("Expected #{value.to_s}, got #{actual.to_s}")
+        end
+      end
+    end
+
+    def call
+      @@contexts.each do |context|
+        puts name
+        puts "  #{context[:description]}"
+        context[:block].call
+      end
+    end
+  end
+
+  class Result
+    def initialize(value)
+      @value = value
+    end
+
+    attr_reader :value
+
+    def to(matcher)
+      matcher.call(value)
+      puts "    Passed!"
+    end
+  end
+
+  class AssertionError < RuntimeError
+  end
+end
diff --git a/spec/lib/router_spec.rb b/spec/lib/router_spec.rb
new file mode 100644
index 0000000..ef56c97
--- /dev/null
+++ b/spec/lib/router_spec.rb
@@ -0,0 +1,16 @@
+require './lib/spec'
+require './lib/router'
+
+class RouterSpec < Spec
+  context "#call" do
+    router = Router.new
+    env = { "REQUEST_PATH" => "/home/5", "REQUEST_METHOD" => "GET" }
+    router.get("/home/:id") do |params|
+      "test content 5"
+    end
+
+    expect(router.call(env)).to eq [200, {"Content-Type"=>"text/html"}, ["test content 5"]]
+  end
+
+  call
+end