Part 6. Building a TUI - CSCI 241 Systems Programming Labs

Part 6. Building a TUI (20 points)

In the final part of this lab, you will implement the text-based user interface (TUI) shown in the overview.

Your task

Change your run() function to implement the text-based user interface. See the examples below.

When gutensearch starts, it should print out a welcome message containing the number of entries in the index and example queries.

Then in a loop it should print the instruction to enter a search query and how to exit. Then print out a prompt string "> " (don’t forget to flush stdout so that the prompt appears). Read a line from stdin. If the line is empty (because the user pressed control-d), exit the program successfully. If the line consists only of white space, print the prompt again and wait for more input.

There are three types of queries you need to handle:

title: query: pass the trimmed query portion to Index::title_search(), unless the trimmed query is empty in which case it should print the prompt again;
author: query: same as the title query except use Index::author_search(), of course; and
query: pass the trimmed query to Index::search().

If a colon appears but the trimmed text before the colon is neither title nor author, print an error message and print the prompt again.

Tip

Some tips.

Use str::find() to find the first : character;
Use str::trim() to trim strings;

Example

Here’s an example run showing empty queries, errors, a success, and an empty search result for a valid query.

 cargo run --quiet
Welcome to Gutensearch! The index contains 71329 entries.
Example queries to search titles, authors, or both:
  > title: two cities
  > author: wodehouse
  > shelley

Enter a search query (ctrl-d to exit)
> 
> 
> title:
> author:
> subject:
Unknown query type: subject

> title: The Modern Prometheus
Author: Shelley, Mary Wollstonecraft
Title: Frankenstein; Or, The Modern Prometheus
URL: https://www.gutenberg.org/ebooks/20038
Resources
- audio: https://www.gutenberg.org/files/20038/mp3/20038-17.mp3
- audio: https://www.gutenberg.org/files/20038/mp3/20038-03.mp3
- audio: https://www.gutenberg.org/files/20038/mp3/20038-06.mp3
- audio: https://www.gutenberg.org/files/20038/m4b/20038-01.m4a
- audio: https://www.gutenberg.org/files/20038/ogg/20038-12.ogg
- audio: https://www.gutenberg.org/files/20038/m4b/20038-09.m4a
- audio: https://www.gutenberg.org/files/20038/spx/20038-24.spx
- audio: https://www.gutenberg.org/files/20038/ogg/20038-02.ogg
- audio: https://www.gutenberg.org/files/20038/20038-m4b.zip
- audio: https://www.gutenberg.org/files/20038/m4b/20038-04.m4a
- audio: https://www.gutenberg.org/files/20038/ogg/20038-08.ogg
- audio: https://www.gutenberg.org/files/20038/ogg/20038-09.ogg
- audio: https://www.gutenberg.org/files/20038/mp3/20038-09.mp3
- audio: https://www.gutenberg.org/files/20038/m4b/20038-13.m4a
- audio: https://www.gutenberg.org/files/20038/ogg/20038-16.ogg
- audio: https://www.gutenberg.org/files/20038/ogg/20038-14.ogg
- audio: https://www.gutenberg.org/files/20038/mp3/20038-02.mp3
- audio: https://www.gutenberg.org/files/20038/spx/20038-05.spx
- audio: https://www.gutenberg.org/files/20038/m4b/20038-24.m4a
- audio: https://www.gutenberg.org/files/20038/mp3/20038-14.mp3
- audio: https://www.gutenberg.org/files/20038/spx/20038-15.spx
- audio: https://www.gutenberg.org/files/20038/m4b/20038-08.m4a
- audio: https://www.gutenberg.org/files/20038/spx/20038-09.spx
- audio: https://www.gutenberg.org/files/20038/ogg/20038-19.ogg
- audio: https://www.gutenberg.org/files/20038/spx/20038-08.spx
- audio: https://www.gutenberg.org/files/20038/m4b/20038-10.m4a
- audio: https://www.gutenberg.org/files/20038/mp3/20038-20.mp3
- audio: https://www.gutenberg.org/files/20038/spx/20038-10.spx
- audio: https://www.gutenberg.org/files/20038/ogg/20038-06.ogg
- audio: https://www.gutenberg.org/files/20038/spx/20038-11.spx
- audio: https://www.gutenberg.org/files/20038/m4b/20038-15.m4a
- audio: https://www.gutenberg.org/files/20038/ogg/20038-17.ogg
- audio: https://www.gutenberg.org/files/20038/ogg/20038-01.ogg
- audio: https://www.gutenberg.org/files/20038/spx/20038-16.spx
- text: https://www.gutenberg.org/files/20038/20038-index.html
- audio: https://www.gutenberg.org/files/20038/mp3/20038-01.mp3
- audio: https://www.gutenberg.org/files/20038/mp3/20038-19.mp3
- audio: https://www.gutenberg.org/files/20038/spx/20038-07.spx
- audio: https://www.gutenberg.org/files/20038/mp3/20038-10.mp3
- text: https://www.gutenberg.org/files/20038/20038-readme.txt
- audio: https://www.gutenberg.org/files/20038/spx/20038-06.spx
- audio: https://www.gutenberg.org/files/20038/mp3/20038-04.mp3
- audio: https://www.gutenberg.org/files/20038/spx/20038-13.spx
- audio: https://www.gutenberg.org/files/20038/mp3/20038-05.mp3
- audio: https://www.gutenberg.org/files/20038/m4b/20038-02.m4a
- audio: https://www.gutenberg.org/files/20038/m4b/20038-03.m4a
- audio: https://www.gutenberg.org/files/20038/m4b/20038-05.m4a
- audio: https://www.gutenberg.org/files/20038/mp3/20038-12.mp3
- audio: https://www.gutenberg.org/files/20038/ogg/20038-18.ogg
- audio: https://www.gutenberg.org/files/20038/m4b/20038-16.m4a
- audio: https://www.gutenberg.org/files/20038/ogg/20038-03.ogg
- audio: https://www.gutenberg.org/files/20038/mp3/20038-24.mp3
- audio: https://www.gutenberg.org/files/20038/spx/20038-18.spx
- audio: https://www.gutenberg.org/files/20038/mp3/20038-15.mp3
- audio: https://www.gutenberg.org/files/20038/ogg/20038-07.ogg
- audio: https://www.gutenberg.org/files/20038/ogg/20038-05.ogg
- audio: https://www.gutenberg.org/files/20038/spx/20038-17.spx
- audio: https://www.gutenberg.org/files/20038/ogg/20038-15.ogg
- audio: https://www.gutenberg.org/files/20038/spx/20038-12.spx
- audio: https://www.gutenberg.org/files/20038/spx/20038-01.spx
- audio: https://www.gutenberg.org/files/20038/m4b/20038-20.m4a
- audio: https://www.gutenberg.org/files/20038/mp3/20038-07.mp3
- audio: https://www.gutenberg.org/files/20038/mp3/20038-08.mp3
- audio: https://www.gutenberg.org/files/20038/m4b/20038-21.m4a
- audio: https://www.gutenberg.org/files/20038/spx/20038-03.spx
- audio: https://www.gutenberg.org/files/20038/spx/20038-04.spx
- audio: https://www.gutenberg.org/files/20038/ogg/20038-10.ogg
- audio: https://www.gutenberg.org/files/20038/spx/20038-02.spx
- audio: https://www.gutenberg.org/files/20038/ogg/20038-21.ogg
- audio: https://www.gutenberg.org/files/20038/spx/20038-20.spx
- audio: https://www.gutenberg.org/files/20038/m4b/20038-11.m4a
- audio: https://www.gutenberg.org/files/20038/spx/20038-19.spx
- audio: https://www.gutenberg.org/files/20038/ogg/20038-20.ogg
- audio: https://www.gutenberg.org/files/20038/m4b/20038-06.m4a
- audio: https://www.gutenberg.org/files/20038/mp3/20038-16.mp3
- audio: https://www.gutenberg.org/files/20038/ogg/20038-24.ogg
- audio: https://www.gutenberg.org/files/20038/m4b/20038-17.m4a
- audio: https://www.gutenberg.org/files/20038/mp3/20038-13.mp3
- audio: https://www.gutenberg.org/files/20038/m4b/20038-19.m4a
- audio: https://www.gutenberg.org/files/20038/ogg/20038-13.ogg
- audio: https://www.gutenberg.org/files/20038/m4b/20038-14.m4a
- audio: https://www.gutenberg.org/files/20038/ogg/20038-11.ogg
- audio: https://www.gutenberg.org/files/20038/m4b/20038-18.m4a
- audio: https://www.gutenberg.org/files/20038/mp3/20038-18.mp3
- audio: https://www.gutenberg.org/files/20038/mp3/20038-11.mp3
- audio: https://www.gutenberg.org/files/20038/spx/20038-14.spx
- audio: https://www.gutenberg.org/files/20038/m4b/20038-07.m4a
- audio: https://www.gutenberg.org/files/20038/spx/20038-21.spx
- audio: https://www.gutenberg.org/files/20038/mp3/20038-21.mp3
- audio: https://www.gutenberg.org/files/20038/m4b/20038-12.m4a
- audio: https://www.gutenberg.org/files/20038/20038-mp3.zip
- audio: https://www.gutenberg.org/files/20038/ogg/20038-04.ogg

Author: Shelley, Mary Wollstonecraft
Title: Frankenstein; Or, The Modern Prometheus
URL: https://www.gutenberg.org/ebooks/41445
Resources
- text: https://www.gutenberg.org/ebooks/41445.html.images
- text: https://www.gutenberg.org/files/41445/41445-h/41445-h.htm
- epub: https://www.gutenberg.org/ebooks/41445.epub3.images
- epub: https://www.gutenberg.org/ebooks/41445.epub.images
- epub: https://www.gutenberg.org/ebooks/41445.epub.noimages
- text: https://www.gutenberg.org/ebooks/41445.txt.utf-8
- text: https://www.gutenberg.org/files/41445/41445-0.txt

Author: Shelley, Mary Wollstonecraft
Title: Frankenstein; Or, The Modern Prometheus
URL: https://www.gutenberg.org/ebooks/42324
Resources
- text: https://www.gutenberg.org/ebooks/42324.html.images
- text: https://www.gutenberg.org/files/42324/42324-h/42324-h.htm
- text: https://www.gutenberg.org/files/42324/42324-h.zip
- epub: https://www.gutenberg.org/ebooks/42324.epub3.images
- epub: https://www.gutenberg.org/ebooks/42324.epub.images
- epub: https://www.gutenberg.org/ebooks/42324.epub.noimages
- text: https://www.gutenberg.org/ebooks/42324.txt.utf-8
- text: https://www.gutenberg.org/files/42324/42324-8.txt
- text: https://www.gutenberg.org/files/42324/42324-8.zip
- text: https://www.gutenberg.org/files/42324/42324.txt
- text: https://www.gutenberg.org/files/42324/42324.zip

Author: Shelley, Mary Wollstonecraft
Title: Frankenstein; Or, The Modern Prometheus
URL: https://www.gutenberg.org/ebooks/84
Resources
- text: https://www.gutenberg.org/ebooks/84.html.images
- text: https://www.gutenberg.org/files/84/84-h/84-h.htm
- epub: https://www.gutenberg.org/ebooks/84.epub3.images
- epub: https://www.gutenberg.org/ebooks/84.epub.images
- epub: https://www.gutenberg.org/ebooks/84.epub.noimages
- text: https://www.gutenberg.org/ebooks/84.txt.utf-8
- text: https://www.gutenberg.org/files/84/84-0.txt


Enter a search query (ctrl-d to exit)
> author: Not A. Real Author
No matching results


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>

Your output need not match mine exactly, but it should be substantially similar.

If your code works, congratulations! Submit your work and then consider finding a book on Project Gutenberg and giving it a read!