Add a working example for Tumblr

examples/tumblr_cli.rb

@@ -0,0 +1,256 @@
+#!/usr/bin/env ruby
+# frozen_string_literal: true
+
+# Tumblr CLI
+#
+# This script is a command-line interface for interacting with the Tumblr API
+# using OAuth 1.0a. It performs OAuth bootstrap using an ephemeral local Sinatra
+# callback server and immediately transitions into an interactive CLI menu
+# without requiring the script to be re-run.
+#
+# Tumblr App Setup (Required):
+# 1. Create a Tumblr application at https://www.tumblr.com/oauth/apps
+# 2. Enable OAuth 1.0a for the application
+# 3. Set the "Default callback URL" to:
+#       http://localhost:4567/callback
+#    (Must match exactly: scheme, host, port, and path)
+# 4. OAuth2 redirect URLs are not used by this script and may be left empty
+#
+# Authentication model:
+# - Consumer key and secret are provided as CLI arguments.
+# - On startup, an ephemeral local Sinatra server is launched on localhost
+#   to handle the OAuth 1.0a callback.
+# - The server exists only long enough to exchange the OAuth verifier for an
+#   access token.
+# - Access tokens are stored in memory only (not written to disk).
+# - Once OAuth completes, the server shuts down and the CLI menu starts.
+#
+# Required gems:
+#   gem install oauth sinatra puma launchy
+#
+# Usage:
+#   ruby tumblr_cli.rb --consumer-key <KEY> --consumer-secret <SECRET>
+#
+# Notes:
+# - OAuth authorization is required once per execution.
+# - This script intentionally uses OAuth 1.0a to demonstrate legacy OAuth
+#   handling and Tumblr-specific constraints.
+
+require "optparse"
+
+# CLI Arguments
+options = {}
+
+OptionParser.new do |opts|
+  opts.banner = "Usage: ruby tumblr_cli.rb --consumer-key KEY --consumer-secret SECRET"
+
+  opts.on("--consumer-key KEY", "Tumblr consumer key") do |v|
+    options[:consumer_key] = v
+  end
+
+  opts.on("--consumer-secret SECRET", "Tumblr consumer secret") do |v|
+    options[:consumer_secret] = v
+  end
+end.parse!
+
+ARGV.clear
+
+unless options[:consumer_key] && options[:consumer_secret]
+  puts "Missing required arguments."
+  exit 1
+end
+
+# Immutable configuration
+CONSUMER_KEY = options[:consumer_key].freeze
+CONSUMER_SECRET = options[:consumer_secret].freeze
+
+require "sinatra"
+require "oauth"
+require "launchy"
+require "json"
+require "uri"
+
+API_BASE = "https://api.tumblr.com/v2"
+CALLBACK_URL = "http://localhost:4567/callback"
+
+set :bind, "localhost"
+set :port, 4567
+set :server, :puma
+set :logging, false
+
+# Mutable runtime state (Sinatra-managed)
+set :access_token, nil
+
+# OAuth Consumer
+def consumer
+  OAuth::Consumer.new(
+    CONSUMER_KEY,
+    CONSUMER_SECRET,
+    site: "https://www.tumblr.com",
+    request_token_path: "/oauth/request_token",
+    authorize_path: "/oauth/authorize",
+    access_token_path: "/oauth/access_token",
+    http_method: :post,
+  )
+end
+
+# OAuth Bootstrap (Ephemeral Sinatra)
+REQUEST_TOKENS = {}
+
+get "/" do
+  request_token = consumer.get_request_token(
+    oauth_callback: CALLBACK_URL,
+    http_method: :post,
+  )
+
+  REQUEST_TOKENS[request_token.token] = request_token.secret
+  redirect request_token.authorize_url
+end
+
+get "/callback" do
+  token = params[:oauth_token]
+  verifier = params[:oauth_verifier]
+
+  request_token = OAuth::RequestToken.new(
+    consumer,
+    token,
+    REQUEST_TOKENS[token],
+  )
+
+  settings.access_token = request_token.get_access_token(
+    oauth_verifier: verifier,
+    http_method: :post,
+  )
+
+  puts "\nOAuth complete. Access token acquired.\n"
+
+  Thread.new {
+    sleep 1
+    Sinatra::Application.quit!
+  }
+  "Authorization complete. You can close this window."
+end
+
+# HTTP Helper
+def api_get(path, params = {})
+  url = "#{API_BASE}#{path}"
+  url += "?#{URI.encode_www_form(params)}" unless params.empty?
+  JSON.parse(settings.access_token.get(url).body)
+end
+
+# Rendering Helpers
+def print_post(post)
+  puts "-" * 60
+  puts "Type : #{post["type"]}"
+  puts "Date : #{post["date"]}"
+  puts "URL  : #{post["post_url"]}"
+
+  case post["type"]
+  when "text"
+    puts "\n#{post["title"]}" if post["title"]
+    puts post["body"]
+  when "photo"
+    puts "\nCaption:"
+    puts post["caption"] if post["caption"]
+    post["photos"]&.each do |p|
+      puts "Photo: #{p["original_size"]["url"]}"
+    end
+  else
+    puts "\nSummary:"
+    puts post["summary"]
+  end
+end
+
+# Lists blogs owned by the authenticated user that have published posts.
+#
+# This method queries the Tumblr API for the current user's account details
+# (`/v2/user/info`) and extracts the set of blogs associated with the user.
+# It then filters that list to include only blogs that:
+#
+# - Are owned by the authenticated user (`admin == true`)
+# - Have at least one published post (`posts > 0`)
+#
+# For each qualifying blog, a short summary is printed to STDOUT including:
+# - Blog name
+# - Blog URL
+# - Total number of posts
+#
+# API endpoint used:
+#   GET /v2/user/info
+#
+#   This method does not return a value.
+def list_my_blogs
+  blogs = api_get("/user/info").dig("response", "user", "blogs") || []
+
+  blogs.select { |b| b["admin"] && b["posts"].to_i > 0 }.each do |b|
+    puts "-" * 50
+    puts "Name : #{b["name"]}"
+    puts "URL  : #{b["url"]}"
+    puts "Posts: #{b["posts"]}"
+  end
+end
+
+# Lists blogs owned by the authenticated user and displays the latest full posts
+# for each blog.
+#
+# This method retrieves the current user's blogs via the Tumblr API
+# (`/v2/user/info`), filters the list to blogs owned by the authenticated user
+# that contain published posts, and then fetches the most recent posts for
+# each qualifying blog.
+#
+# For each blog:
+# - A header containing the blog name and total post count is printed
+# - The latest five posts are retrieved via the blog posts endpoint
+# - Each post is rendered in full using type-aware formatting suitable for
+#   command-line output
+#
+# Post content is displayed directly to STDOUT and may include text bodies,
+# captions, media URLs, and summaries depending on post type.
+#
+# API endpoints used:
+#   GET /v2/user/info
+#   GET /v2/blog/{blog-identifier}/posts
+#
+#   This method does not return a value.
+def list_my_blogs_with_latest_posts
+  blogs = api_get("/user/info").dig("response", "user", "blogs") || []
+
+  blogs.select { |b| b["admin"] && b["posts"].to_i > 0 }.each do |b|
+    puts "\n" + "=" * 70
+    puts "Blog: #{b["name"]} (#{b["posts"]} posts)"
+    puts "=" * 70
+
+    posts = api_get(
+      "/blog/#{b["name"]}.tumblr.com/posts",
+      limit: 5,
+    ).dig("response", "posts") || []
+
+    posts.each { |p| print_post(p) }
+  end
+end
+
+# Menu
+def menu
+  loop do
+    puts "\nTumblr CLI"
+    puts "1) List my blogs (with posts)"
+    puts "2) Show latest 5 full posts per blog"
+    puts "3) Exit"
+    print("> ")
+
+    case STDIN.gets&.strip
+    when "1" then list_my_blogs
+    when "2" then list_my_blogs_with_latest_posts
+    when "3" then exit(0)
+    else puts "Invalid option."
+    end
+  end
+end
+
+# Entry Point
+puts "Starting Tumblr OAuth flow..."
+Launchy.open("http://localhost:4567")
+
+Sinatra::Application.run!
+
+menu