serde json

riesenie1/Cargo.lock

@@ -0,0 +1,123 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+version = 4
+
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+]
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+]
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riesenie1/Cargo.toml

@@ -0,0 +1,9 @@
+[package]
+name = "riesenie1"
+version = "0.1.0"
+edition = "2024"
+
+[dependencies]
+itertools = "0.14.0"
+serde = { version = "1.0.228", features = ["derive"] }
+serde_json = "1.0.149"

riesenie1/src/lib.rs

@@ -0,0 +1,118 @@
+// src/lib.rs
+use std::fmt;
+use std::fs::File;
+use std::fs;
+use std::collections::HashMap;
+use std::io::Write;
+
+#[derive(Debug, Default, serde::Serialize, serde::Deserialize)]
+pub struct Kniha {
+    autori: Vec<String>,
+    nazov: String,
+    vydavatelstvo: String,
+    zaner: String,
+    pocet_stran: usize,
+    isbn: String,
+    rok_vydania: String,
+    pozicana: bool,
+    stav_knihy: Stav,
+}
+
+impl fmt::Display for Kniha {
+    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
+        write!(f, "({:#?}, {}, {}, {}, {}, {}, {}, {}, {:#?})",
+               self.autori,
+               self.nazov,
+               self.vydavatelstvo,
+               self.zaner,
+               self.pocet_stran,
+               self.isbn,
+               self.rok_vydania,
+               self.pozicana,
+               self.stav_knihy,
+        )
+    }
+}
+
+#[derive(Debug, Default, serde::Serialize, serde::Deserialize, PartialEq)]
+pub enum Stav {
+    #[default]
+    Nova,
+    Pouzivana,
+    Poskodena,
+    Vyradena
+}
+
+impl fmt::Display for Stav {
+    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
+        match self {
+            Stav::Nova => write!(f, "Nova"),
+            Stav::Pouzivana => write!(f, "Pouzivana"),
+            Stav::Poskodena => write!(f, "Poskodena"),
+            Stav::Vyradena => write!(f, "Vyradena"),
+        }
+    }
+}
+
+#[derive(Default, serde::Serialize, serde::Deserialize)]
+pub struct Kniznica {
+    knihy: Vec<Kniha>
+}
+
+impl Kniznica {
+    pub fn nacitaj_zo_suboru(r: &std::path::PathBuf) -> Option<Kniznica> {
+        let d: String = std::fs::read_to_string(r).ok()?;
+        let r: Option<Kniznica> = serde_json::from_str(&d).ok()?;
+        r
+    }
+
+    pub fn uloz_do_suboru(&self, z: &std::path::PathBuf) -> bool {
+        let Ok(f) = File::create(z) else{
+            return false;
+        };
+        serde_json::to_writer_pretty(f, &self).is_ok()
+    }
+
+    pub fn pridaj_knihu(&mut self, k: Kniha) -> Result<(), ()> {
+        if self.knihy.iter().map(|x| x.isbn.clone()).any(|y| y == k.isbn) {
+            return Err(());
+        }
+        self.knihy.push(k);
+        Ok(())
+    }
+
+    pub fn odstran_knihu(&mut self, r: &str) -> Result<Kniha, ()> {
+        let Some(k) = self.knihy.iter().position(|x| x.isbn == r) else {
+            return Err(());
+        };
+        let t = self.knihy.remove(k);
+        Ok(t)
+    }
+
+    pub fn daj_knihu_podla_isbn(&self, i: &str) -> Option<&Kniha> {
+        self.knihy.iter().find(|x| x.isbn == i)
+    }
+
+    pub fn daj_knihy_autora(&self, a: &str) -> Vec<&Kniha> {
+        self.knihy.iter().filter(|y| y.autori.contains(&a.to_string())).collect()
+    }
+
+    pub fn daj_knihy_podla_stavu(&self, s: Stav) -> Vec<&Kniha> {
+        self.knihy.iter().filter(|x| x.stav_knihy == s).collect()
+    }
+
+    pub fn vypis_vydavatelstva_a_pocet_knih(&self) {
+        let mut h: HashMap<String, usize> = HashMap::new();
+        for x in self.knihy.iter() {
+            h.entry(x.vydavatelstvo.clone()).and_modify(|x| *x += 1).or_insert(1);
+        }
+        // self.knihy.iter().counts();
+        for y in h.iter() {
+            println!("{}: {} knih", y.0, y.1)
+        }
+    }
+
+    pub fn vypis_knihy_daneho_zanru(&self, zk: &str) {
+        self.knihy.iter().filter(|&x| x.zaner == zk).map(|x| println!("{:#?}", x));
+    }
+}

riesenie1/src/main.rs

@@ -0,0 +1,3 @@
+fn main() {
+
+}