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 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-c 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-c to exit)
> author: Not A. Real Author
No matching results


Enter a search query (ctrl-c to exit)
>

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!

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CSCI 241 Systems Programming Labs

Part 6. Building a TUI (20 points)

Your task