From 28e3a7a068d301e37197c97091b744a193ecdf8b Mon Sep 17 00:00:00 2001
From: Danila Fedorin <danila.fedorin@gmail.com>
Date: Fri, 29 May 2020 13:28:04 -0700
Subject: [PATCH] Automatically generate custom table of contents.

---
 Makefile    |  6 +++++-
 default.nix |  2 ++
 intro.tex   |  4 ++--
 toc.rb      | 49 +++++++++++++++++++++++++++++++++++++++++++++++++
 4 files changed, 58 insertions(+), 3 deletions(-)
 create mode 100644 toc.rb

diff --git a/Makefile b/Makefile
index e1393e5..ad96fc7 100644
--- a/Makefile
+++ b/Makefile
@@ -2,6 +2,7 @@ archive.pdf: intro.pdf requirements.pdf design-doc.pdf \
     binary/techreview-ryan.pdf techreview-daniel.pdf binary/techreview-matt.pdf \
     binary/blog-ryan.pdf blog-daniel.pdf binary/blog-matt.pdf \
     readme.pdf resources.pdf reflection.pdf listings.pdf images.pdf review.pdf todo.pdf
+	ruby toc.rb
 	pdfjam --no-tidy --outfile archive.pdf -- intro.pdf requirements.pdf design-doc.pdf \
 	    binary/techreview-ryan.pdf techreview-daniel.pdf binary/techreview-matt.pdf \
 	    binary/blog-ryan.pdf blog-daniel.pdf binary/blog-matt.pdf \
@@ -72,7 +73,10 @@ review-collar.tex: external/collar/REVIEW.md
 review.pdf: review-app.tex review-server.tex review-collar.tex review.tex
 	pdflatex review.tex
 
-intro.pdf: intro.tex
+generated.toc:
+	touch generated.toc
+
+intro.pdf: intro.tex generated.toc
 	pdflatex intro.tex
 
 blog-daniel.pdf: external/blog-daniel/blog.tex
diff --git a/default.nix b/default.nix
index 1f4c1ac..335a5ee 100644
--- a/default.nix
+++ b/default.nix
@@ -2,6 +2,8 @@ with import <nixpkgs> {};
 
 mkShell {
   buildInputs = [
+    pdftk
+    ruby
     pandoc
     (texlive.combine {
       inherit (texlive)
diff --git a/intro.tex b/intro.tex
index 5edc7bb..d2e39d9 100644
--- a/intro.tex
+++ b/intro.tex
@@ -72,8 +72,8 @@
 \end{titlepage}
 
 \pagebreak
-\section*{Foreword}
-% TODO
+\section*{Table of Contents}
+\input{generated.toc}
 
 \pagebreak
 \section{Project Introduction}
diff --git a/toc.rb b/toc.rb
new file mode 100644
index 0000000..a661848
--- /dev/null
+++ b/toc.rb
@@ -0,0 +1,49 @@
+def all_pages(name, pdf)
+  return [:pdf, name, pdf]
+end
+
+def all_no_entry(name, pdf)
+  return [:pdf_no_entry, name, pdf]
+end
+
+def section_offset(name, page)
+  return [:section, name, page]
+end
+
+pdf_structure = [
+  all_no_entry("Introduction", "intro.pdf"),
+  all_pages("Requirements Document", "requirements.pdf"),
+  all_pages("Design Document", "design-doc.pdf"),
+  all_pages("Ryan Alder's Tech Review", "binary/techreview-ryan.pdf"),
+  all_pages("Danila Fedorin's Tech Review", "techreview-daniel.pdf"),
+  all_pages("Matthew Sessions' Tech Review", "binary/techreview-matt.pdf"),
+  all_pages("Ryan Alder's Blog Posts", "binary/blog-ryan.pdf"),
+  all_pages("Danila Fedorin's Blog Posts", "blog-daniel.pdf"),
+  all_pages("Matthew Sessions' Blog Posts", "binary/blog-matt.pdf"),
+  all_pages("Project Documentation and READMEs", "readme.pdf"),
+  all_pages("Learning Resources", "resources.pdf"),
+  all_pages("Conclusions and Reflections", "reflection.pdf"),
+  all_pages("Appendix 1: Essential Code Listings", "listings.pdf"),
+  all_pages("Appendix 2: Project Images", "images.pdf"),
+  all_pages("Appendix 2: Code Review Changes", "review.pdf"),
+  all_pages("Appendix 4: Remaining Work", "todo.pdf")
+]
+
+toc = File.open("generated.toc", "w")
+
+page_tally = 1
+section_counter = 1
+pdf_structure.each do |entry|
+  next unless entry[0] == :pdf or entry[0] == :pdf_no_entry
+  type, name, pdf = entry
+  page_count = `pdftk #{pdf} dump_data | grep NumberOfPages`.split(":")[1].to_i
+  output = "\\contentsline {section}{\\numberline {#{section_counter}}#{name}}{#{page_tally}}%"
+
+  if type == :pdf
+    toc.puts output
+    puts output
+  end
+
+  section_counter += 1
+  page_tally += page_count
+end