Merge pull request #655 from AnthonyMichaelTDM/rust-port-95_weekday

rust port of 95_weekday

95_Weekday/rust/Cargo.toml

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+[package]
+name = "rust"
+version = "0.1.0"
+edition = "2021"
+
+# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
+
+[dependencies]

95_Weekday/rust/README.md

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+Original source downloaded [from Vintage Basic](http://www.vintage-basic.net/games.html)
+
+Conversion to [Rust](https://www.rust-lang.org/) by Anthony Rubick [AnthonyMichaelTDM](https://github.com/AnthonyMichaelTDM)

95_Weekday/rust/src/main.rs

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+use std::io::{self, stdout, Write};
+
+struct DATE {
+    month: u32,
+    day: u32,
+    year:u32,
+    day_of_week:u32,
+}
+impl DATE {
+    /**
+     * create new date with given paramets
+     */
+    fn new(month:u32,day:u32,year:u32,day_of_week:u32) -> DATE {
+        return DATE { month: month, day: day, year: year, day_of_week: day_of_week };
+    }
+    /**
+     * create date from user input
+     */
+    fn new_from_input(prompt:&str) -> DATE {
+        //DATA
+        let mut raw_date: Vec<u32>;
+        //get date
+        //input loop
+        loop {
+            //get user input,
+            raw_date = get_str_from_user(prompt)
+            .split(',')//split it up by ',''s
+            .filter_map(|s| s.parse::<u32>().ok()).collect();//convert it to numbers, ignore things that fail
+            
+            //if they didn't give enough data
+            if raw_date.len() == 3 { //is it long enough? (3 elements)
+                //are each ones valid things?
+                if (1..=12).contains(&raw_date[0]) { //valid month
+                    if (1..=31).contains(&raw_date[1]) { //valid day
+                        break;
+                    }
+                }
+            }
+            //otherwise, print error message and go again
+            println!("Invalid date, try again!");
+        }
+
+        //create date
+        let mut date =DATE::new(raw_date[0], raw_date[1], raw_date[2], 0);
+        date.update_day_of_week();
+        //return date
+        return date
+    }
+    /**
+     * create a new date from a number of days
+     */
+    fn new_from_days(days:u32) -> DATE{
+        let mut days_remaining = days;
+        let d;
+        let m;
+        let y;
+
+        //get the years
+        y=(days_remaining as f64 / 365.25) as u32;
+        //deduct
+        days_remaining = (days_remaining as f64 % 365.25) as u32;
+
+        //get months
+        m=(days_remaining as f64 / 30.437) as u32;
+        //deduct
+        days_remaining = (days_remaining as f64 % 30.437) as u32;
+
+        //get days
+        d = days_remaining;
+
+        //return new date
+        return DATE::new(m, d, y, 0);
+    }
+
+    /**
+     * caluclates the day of the week (1-7)
+     * uses the methodology found here: https://cs.uwaterloo.ca/~alopez-o/math-faq/node73.html
+     */
+    fn update_day_of_week(&mut self) {
+        //DATA
+        let day = self.day as isize;
+        let month = self.month as isize;
+        let year = self.year as isize;
+        let century = year/100;
+        let year_of_century = year - century*100;
+        let weekday; //as 0-6
+
+        //calculate weekday
+        if self.month <= 2 { //if jan or feb
+            weekday = (day + (2.6 * ((month+10) as f64)-0.2)as isize - 2*century + (year_of_century-1) + (year_of_century-1)/4 + century/4) % 7;
+        } else {
+            weekday = (day + (2.6 * ((month-2)  as f64)-0.2)as isize - 2*century + year_of_century     + year_of_century/4     + century/4) % 7;
+        }
+
+        //update weekday
+        self.day_of_week=(weekday+1) as u32; //weekday as 1-7
+    }
+
+    /**
+     * return the string for the weekday
+     */
+    fn day_of_week_as_string(&self) -> String {
+        match self.day_of_week {
+            1 => {return String::from("SUNDAY")},
+            2 => {return String::from("MONDAY")},
+            3 => {return String::from("TUESDAY")},
+            4 => {return String::from("WEDNESDAY")},
+            5 => {return String::from("THURSDAY")},
+            6 => {
+                if self.day == 13 {return String::from("FRIDAY THE THIRTEENTH---BEWARE!")}
+                else {return String::from("FRIDAY")}
+            },
+            7 => {return String::from("SATURDAY")}, 
+            _ => {return String::from("")},
+        }
+    }
+
+    /**
+     * is the year a leap_year
+     */
+    fn _is_leap_year(&self) -> bool{
+        if self.year % 4 != 0 {
+            return false;
+        } else if self.year %100 != 0 {
+            return true;
+        } else if self.year % 400 != 0 {
+            return false;
+        } else {
+            return true;
+        }
+    }
+
+    /**
+     * calculates the day value, number of days the date represents
+     */
+    fn calc_days(&self) -> u32 {
+        return (self.year as f64 * 365.25)as u32 + self.month*30 + self.day + self.month/2;
+    }
+
+    /**
+     * calculates the time difference between self and the passed date,
+     */
+    fn time_since(&self, other: &DATE) -> Option<DATE> {
+        //DATA
+        // /*
+        let diff = self.calc_days()as i32 - other.calc_days()as i32;
+        if diff < 0 { 
+            return None;
+        } else {
+            return Some(DATE::new_from_days(diff as u32));
+        }
+    }
+
+    /**
+     * formats the date in a different format, used for time table
+     */
+    fn format_ymd(&self, spacer:&str) -> String {
+        return format!(
+            "{}{}{}{}{}",
+            self.year, spacer,
+            self.month, spacer,
+            self.day,
+        );
+    }
+}
+impl ToString for DATE {
+    fn to_string(&self) -> String {
+        return format!("{}/{}/{}",self.month,self.day,self.year);
+    }
+}
+
+fn main() {
+    //DATA
+    let today_date: DATE;
+    let other_date:DATE;
+    let delta_date:DATE; //represents the difference between the two dates
+    let today_value;
+    let other_day_value;
+    let mut other_is_today = false;
+
+    //print welcome
+    welcome();
+    
+    //get todays date
+    today_date = DATE::new_from_input("ENTER TODAY'S DATE IN THE FORM: 3,24,1979  ");
+    //check todays date
+    if today_date.year < 1582 {
+        println!("NOT PREPARED TO GIVE DAY OF WEEK PRIOR TO MDLXXXII.");
+        return;
+    }
+
+    println!();
+
+    //get other date
+    other_date = DATE::new_from_input("ENTER DAY OF BIRTH (OR OTHER DAY OF INTEREST) (like MM,DD,YYYY)");
+    //check other date
+    if other_date.year < 1582 {
+        println!("NOT PREPARED TO GIVE DAY OF WEEK PRIOR TO MDLXXXII.");
+        return;
+    }
+
+    //do some calculations
+    today_value = today_date.calc_days();
+    other_day_value = other_date.calc_days();
+
+    //print the other date in a nice format
+    println!(
+        "{} {} A {}",
+        other_date.to_string(),
+        { //use proper tense of To Be
+            if today_value < other_day_value {"WILL BE"}
+            else if today_value == other_day_value {other_is_today=true;"IS"}
+            else {"WAS"}
+        },
+        other_date.day_of_week_as_string(),
+    );
+
+    //end if both days are the same
+    if other_is_today {
+        return;
+    } 
+
+    //create date representing the difference between the two dates
+    delta_date = today_date.time_since(&other_date).unwrap();
+
+    //print happy birthday message
+    if delta_date.month == 0 && delta_date.day == 0 {
+        println!("***HAPPY BIRTHDAY***");
+    }
+
+    //print report
+    println!("
+                      \tYEARS\tMONTHS\tDAYS
+                      \t-----\t------\t----"
+    );
+    println!("YOUR AGE (IF BIRTHDATE)\t{}", delta_date.format_ymd("\t"));
+    
+    //how much have they slept
+    println!(
+        "YOU HAVE SLEPT\t\t{}",
+        DATE::new_from_days( (0.35 * delta_date.calc_days() as f64) as u32).format_ymd("\t"), //35% of their life
+    );
+
+    //how much they have eaten
+    println!(
+        "YOU HAVE EATEN\t\t{}",
+        DATE::new_from_days( (0.17 * delta_date.calc_days() as f64) as u32).format_ymd("\t"), //17% of their life
+    );
+
+    //how much they have worked
+    println!(
+        "YOU HAVE {}\t{}",
+        {
+            if delta_date.year <= 3 {"PLAYED"}
+            else if delta_date.year <= 9 {"PLAYED/STUDIED"}
+            else {"WORKED/PLAYED"}
+        },
+        DATE::new_from_days( (0.23 * delta_date.calc_days() as f64) as u32).format_ymd("\t"), //23% of their life
+    );
+    //how much they have relaxed
+    println!(
+        "YOU HAVE RELAXED\t{}",
+        DATE::new_from_days( ( (1.0-0.35-0.17-0.23) * delta_date.calc_days() as f64) as u32).format_ymd("\t"), //remaining% of their life
+    );
+    //when they can retire
+    println!(
+        "YOU MAY RETIRE IN\t{}",
+        DATE::new(other_date.month, other_date.day, other_date.year + 65, 0).time_since(&today_date).unwrap().format_ymd("\t")
+    );
+}
+
+
+/**
+ * print welome message
+ */
+fn welcome() {
+    println!("
+                               WEEKDAY
+              CREATIVE COMPUTING  MORRISTOWN, NEW JERSEY
+    
+    
+    
+    WEEKDAY IS A COMPUTER DEMONSTRATION THAT
+    GIVES FACTS ABOUT A DATE OF INTEREST TO YOU.
+    ");
+}
+
+/**
+ * gets a string from user input
+ */
+fn get_str_from_user(prompt:&str) -> String {
+    //DATA
+    let mut raw_input = String::new();
+
+    //print prompt
+    print!("{}",prompt);
+    //flust std out //allows prompt to be on same line as input
+    stdout().flush().expect("failed to flush");
+
+    //get input and trim whitespaces
+    io::stdin().read_line(&mut raw_input).expect("Failed to read input");
+
+    //return raw input
+    return raw_input.trim().to_string();
+}