add simple blog controller

.gitignore

@@ -2,3 +2,93 @@ _site
 .sass-cache
 .jekyll-metadata
 .DS_Store
+
+#----------------------------------------------------------------------------
+# Ignore these files when commiting to a git repository.
+#
+# See http://help.github.com/ignore-files/ for more about ignoring files.
+#
+# The original version of this file is found here:
+# https://github.com/RailsApps/rails-composer/blob/master/files/gitignore.txt
+#
+# Corrections? Improvements? Create a GitHub issue:
+# http://github.com/RailsApps/rails-composer/issues
+#----------------------------------------------------------------------------
+
+public/assets
+.ruby-version
+
+# bundler state
+/.bundle
+/vendor/bundle/
+/vendor/ruby/
+
+# minimal Rails specific artifacts
+db/*.sqlite3
+/db/*.sqlite3-journal
+/log/*
+/tmp/*
+
+# add /config/database.yml if it contains passwords
+/config/database.yml
+/config/secrets.yml
+
+# various artifacts
+**.war
+*.rbc
+*.sassc
+.redcar/
+.sass-cache
+/config/config.yml
+/coverage.data
+/coverage/
+/db/*.javadb/
+/db/*.sqlite3
+/doc/api/
+/doc/app/
+/doc/features.html
+/doc/specs.html
+/public/cache
+/public/stylesheets/compiled
+/public/system/*
+/spec/tmp/*
+/cache
+/capybara*
+/capybara-*.html
+/gems
+/specifications
+rerun.txt
+pickle-email-*.html
+.zeus.sock
+
+# If you find yourself ignoring temporary files generated by your text editor
+# or operating system, you probably want to add a global ignore instead:
+#   git config --global core.excludesfile ~/.gitignore_global
+#
+# Here are some files you may want to ignore globally:
+
+# scm revert files
+**.orig
+
+# Mac finder artifacts
+.DS_Store
+
+# Netbeans project directory
+/nbproject/
+
+# RubyMine project files
+.idea
+
+# Textmate project files
+/*.tmproj
+
+# vim artifacts
+**.swp
+
+# Environment files that may contain sensitive data
+.env
+.powenv
+
+# tilde files are usually backup files from a text editor
+*~
+app/views/blog/_2017-2-2-The-Distraction-Free-Path-to-Becoming-a-Professional-Programmer.haml

app/controllers/blog_controller.rb

@@ -0,0 +1,19 @@
+class BlogController < ApplicationController
+
+  def index
+      @pages = Page.pages
+  end
+
+  def page
+    title = params[:title]
+    return redirect_to(root_path) unless title
+    @page = get_page(title)
+    return redirect_to(root_path) unless @page
+  end
+
+  def get_page(title)
+    page = Page.pages[title]
+    #puts "No #{title} in #{Page.pages.keys.join(':')}"
+    page
+  end
+end

app/models/post.rb

@@ -0,0 +1,54 @@
+class Post
+  @@posts = nil
+
+  attr_reader :year , :month , :day , :dir , :ext
+
+  def initialize(path)
+    @dir = File.dirname(path)
+    base , @ext = File.basename(path).split(".")
+    raise "must be partial, statr with _ not:#{base}" unless base[0] == "_"
+    @words = base.split("-")
+    @year = parse_int(@words.shift[1 .. -1] , 2100)
+    @day = parse_int(@words.shift , 32)
+    @month = parse_int(@words.shift , 12)
+    raise "Invalid path #{path}" unless @words
+  end
+  
+  def slug
+    @words.join("-").downcase
+  end
+  def title
+    @words.join(" ")
+  end
+  def template_name
+    "#{date}-#{@words.join("-")}"
+  end
+  def date
+    "#{year}-#{day}-#{month}"
+  end
+  def parse_int( value , max)
+    ret = value.to_i
+    raise "invalid value #{value} > #{max}" if ret > max or ret < 1
+    ret
+  end
+  def content
+    File.open("#{@dir}/_#{template_name}.#{ext}" ).read
+  end
+  def summary
+    ret = content.split("%h2").first.gsub("%p", "<br/>").html_safe
+    ret[0 .. 400]
+  end
+  def self.posts
+    return @@posts if @@posts
+    @@posts ={}
+    Dir["#{self.blog_path}/_2*.haml"].reverse.each do |file|
+      post = Post.new(file)
+      @@posts[post.slug] = post
+    end
+    @@posts
+  end
+
+  def self.blog_path
+    Rails.configuration.blog_path
+  end
+end

config/application.rb

@@ -15,5 +15,8 @@ module RubyxWebpage
     # Application configuration can go into files in config/initializers
     # -- all .rb files in that directory are automatically loaded after loading
     # the framework and any gems in your application.
+    config.assets.paths << Gem.loaded_specs['susy'].full_gem_path+'/sass'
+
+    config.blog_path = Rails.root.to_s + "/app/views/posts"
   end
 end

spec/models/blog_spec.rb

@@ -0,0 +1,82 @@
+require 'rails_helper'
+
+RSpec.describe Post, type: :model do
+
+  describe "creation" do
+    it "ok with valid slug" do
+      post = Post.new("_1993-2-4-title")
+      expect(post).not_to eq nil
+    end
+    it "raises with invalid slug" do
+      expect{Post.new("_1993-4-title")}.to raise_error RuntimeError
+    end
+    it "must start with a year" do
+      expect{Post.new("_no-num-4-title")}.to raise_error RuntimeError
+    end
+    it "must start with a underscore" do
+      expect{Post.new("_no-num-4-title")}.to raise_error RuntimeError
+    end
+  end
+
+  describe "basic api" do
+    before :each do
+      @post = Post.new("_1993-2-4-title")
+    end
+    it "returns title" do
+      expect(@post.title).to eq "title"
+    end
+    it "returns dates" do
+      expect(@post.year).to eq 1993
+      expect(@post.month).to eq 4
+      expect(@post.day).to eq 2
+    end
+    it "returns date" do
+      expect(@post.date).to eq "1993-2-4"
+    end
+    it "returns file_name" do
+      expect(@post.template_name).to eq "1993-2-4-title"
+    end
+  end
+
+  describe "precise api definition" do
+    it "returns whole title" do
+      post = Post.new("_1993-2-4-Multi-word-title")
+      expect(post.title).to eq "Multi word title"
+    end
+    it "returns slug" do
+      post = Post.new("_1993-2-4-Multi-word-title")
+      expect(post.slug).to eq "multi-word-title"
+    end
+    it "returns title without extension if given file name" do
+      post = Post.new("_1993-2-4-title.rb")
+      expect(post.title).to eq "title"
+    end
+    it 'slugs are downcase' do
+      post = Post.new("_1993-2-4-Multi-word-title")
+      slug = post.slug
+      expect(slug.downcase).to eq slug
+    end
+  end
+
+  describe "post list" do
+    before :each do
+      @posts = Post.posts
+      @first = @posts.values.first
+    end
+    it "reads config path" do
+      expect(Post.blog_path.include?("app")).to eq true
+    end
+    it "first post has content" do
+      expect(@posts.values.first).not_to be_nil
+      expect(@posts.values.first.content.length).to be > 10
+    end
+    it "return a list of posts" do
+      expect(@posts.class).to eq Hash
+      expect(@posts.length).to be > 0
+    end
+    it "post template exists" do
+      file = Post.blog_path + "/_" + @first.template_name + ".haml"
+      expect(File.exists?(file)).to eq true
+    end
+  end
+end