From 2a6c0bf432e7f7c2bf358e624b59e313ec1e1bd9 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?R=C3=A9mi=20BERTHO?= <remi.bertho@dalan.fr>
Date: Mon, 11 May 2020 21:21:57 +0200
Subject: [PATCH] Ajout de classe utilitaires

---
 Cargo.lock           | 1396 ++++++++++++++++++++++++++++++++++++++++++
 Cargo.toml           |    3 +
 TODO.md              |   15 +-
 src/main.rs          |   15 +-
 src/parser.rs        |   28 +
 src/parser/darty.rs  |   47 ++
 src/price_checker.rs |   39 ++
 src/price_result.rs  |    6 +
 8 files changed, 1541 insertions(+), 8 deletions(-)
 create mode 100644 src/parser.rs
 create mode 100644 src/parser/darty.rs
 create mode 100644 src/price_checker.rs
 create mode 100644 src/price_result.rs

diff --git a/Cargo.lock b/Cargo.lock
index 1e9d4b0..0dddb0e 100644
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diff --git a/Cargo.toml b/Cargo.toml
index 87f2f77..c036ee8 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -7,3 +7,6 @@ edition = "2018"
 # See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
 
 [dependencies]
+reqwest = { version = "0.10", features = ["blocking"]}
+scraper = "0.12.0"
+arraygen = "0.1.11"
\ No newline at end of file
diff --git a/TODO.md b/TODO.md
index ef661e4..632d9f7 100644
--- a/TODO.md
+++ b/TODO.md
@@ -1,10 +1,11 @@
 # TODO
 
-* [ ] Récupération prix darty
-* [ ] Récupération URL ligne de commande
-* [ ] Lecture des URLs depuis un fichier
-* [ ] Parallélisation des requêtes
+* [ ] Récupération prix darty avec [scraper](https://crates.io/crates/scraper) et [reqwest](https://crates.io/crates/reqwest)
+* [ ] Ajout du support de la Fnac, …
+* [ ] Récupération URL ligne de commande avec [clap](https://crates.io/crates/clap)
+* [ ] Lecture des URLs depuis un fichier avec [toml](https://crates.io/crates/toml)
+* [ ] Parallélisation des requêtes avce [rayon](rayon)
 * [ ] Écriture dans un fichier ODS avec [calamine](https://crates.io/crates/calamine)
-* [ ] Notification si baisse de prix
-* [ ] Mail si baisse de prix
-* [ ] Lancement de la rechrche régulière
\ No newline at end of file
+* [ ] Notification si baisse de prix avec [notify-rust](https://crates.io/crates/notify-rust)
+* [ ] Mail si baisse de prix avec [lettre](https://crates.io/crates/lettre)
+* [ ] Lancement de la recherche régulière avec [Clokwerk](https://crates.io/crates/clokwerk)
\ No newline at end of file
diff --git a/src/main.rs b/src/main.rs
index e7a11a9..6c0ead1 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -1,3 +1,16 @@
+pub mod price_result;
+pub mod parser;
+pub mod price_checker;
+
+extern crate reqwest;
+extern crate scraper;
+use price_result::PriceResult;
+use price_checker::PriceChecker;
+
 fn main() {
-    println!("Hello, world!");
+	let price_checker = PriceChecker::new();
+
+    let price_result = price_checker.get_price("https://www.darty.com/nav/achat/gros_electromenager/refrigerateur-congelateur-refrigerateur-cong/refrigerateur-congelateur_bas/samsung_rb33n300nsa_ef.html");
+    println!("Product «{}: {}» price {}€", price_result.product, price_result.name, price_result.price);
 }
+
diff --git a/src/parser.rs b/src/parser.rs
new file mode 100644
index 0000000..44a89fa
--- /dev/null
+++ b/src/parser.rs
@@ -0,0 +1,28 @@
+pub mod darty;
+
+extern crate arraygen;
+
+use scraper::Html;
+use crate::price_result::PriceResult;
+use arraygen::Arraygen;
+
+pub trait Parser{
+	fn new() -> Self where Self :Sized;
+	fn can_parse(&self, url : &str) -> bool;
+	fn parse(&self, html : &Html) -> PriceResult;
+}
+
+#[derive(Arraygen, Debug)]
+#[gen_array(pub fn get: & dyn Parser)]
+pub struct List {
+	#[in_array(get)]
+	darty: darty::Darty
+}
+
+impl List {
+	pub fn new() -> Self {
+		List {
+			darty: darty::Darty::new()
+		}
+	}
+}
\ No newline at end of file
diff --git a/src/parser/darty.rs b/src/parser/darty.rs
new file mode 100644
index 0000000..2a8d223
--- /dev/null
+++ b/src/parser/darty.rs
@@ -0,0 +1,47 @@
+use super::Parser;
+use crate::PriceResult;
+use scraper::{Selector, Html};
+
+#[derive(Debug)]
+pub struct Darty {
+	price_selector: Selector,
+	name_selector: Selector,
+	product_selector: Selector
+}
+
+impl Parser for Darty {
+	fn new() -> Self {
+		Darty {
+			price_selector: Selector::parse(r#".darty_prix"#).unwrap(),
+			name_selector: Selector::parse(r#".product_name"#).unwrap(),
+			product_selector: Selector::parse(r#".product_family"#).unwrap()
+		}
+	}
+
+	fn can_parse(&self, url : &str) -> bool {
+		url.contains("darty")
+	}
+
+	fn parse(&self, html : &Html) -> PriceResult {
+		// Get price
+		let price_element = html.select(&self.price_selector).next().unwrap();
+		let mut price_text_it = price_element.text();
+		let price_ent : u32 = price_text_it.next().unwrap_or("0").trim_end_matches(',').parse().unwrap();
+		let price_dec : u32 = price_text_it.next().unwrap_or("0").trim_end_matches('€').parse().unwrap();
+		let price = price_ent as f64 + (price_dec as f64) / 100.;
+
+		// Get name
+		let name_element = html.select(&self.name_selector).next().unwrap();
+		let name = name_element.text().next().unwrap().trim().replace('\n', "-");
+
+		// Get product
+		let family_element = html.select(&self.product_selector).next().unwrap();
+		let family = family_element.text().next().unwrap().trim().replace('\n', "-");
+
+			PriceResult {
+				name: name.to_owned(),
+				product: family.to_owned(),
+				price
+			}
+		}
+}
\ No newline at end of file
diff --git a/src/price_checker.rs b/src/price_checker.rs
new file mode 100644
index 0000000..d07a7b8
--- /dev/null
+++ b/src/price_checker.rs
@@ -0,0 +1,39 @@
+extern crate reqwest;
+
+use reqwest::blocking::Client;
+use scraper::Html;
+use crate::parser;
+use crate::price_result::PriceResult;
+
+const USER_AGENT: &str = "Mozilla/5.0 (X11; Linux x86_64; rv:78.0) Gecko/20100101 Firefox/78.0";
+
+pub struct PriceChecker {
+	client: Client,
+	parser_list: parser::List
+}
+
+impl PriceChecker {
+	pub fn new() -> Self {
+		let client = reqwest::blocking::Client::builder().user_agent(USER_AGENT).build().unwrap();
+		PriceChecker {
+			client,
+			parser_list: parser::List::new()
+		}
+	}
+
+	pub fn get_price(&self, url : &str) -> PriceResult {
+		let response = self.client.get(url).send().unwrap();
+		let text = response.text().unwrap();
+		let document = Html::parse_document(&text);
+		for parser in self.parser_list.get().iter() {
+			if parser.can_parse(url) {
+				return parser.parse(&document);
+			}
+		}
+		PriceResult {
+			name: "name".to_owned(),
+			product: "family".to_owned(),
+			price: 0.
+		}
+	}
+}
\ No newline at end of file
diff --git a/src/price_result.rs b/src/price_result.rs
new file mode 100644
index 0000000..540cf04
--- /dev/null
+++ b/src/price_result.rs
@@ -0,0 +1,6 @@
+#[derive(PartialEq, Clone, Debug)]
+pub struct PriceResult {
+	pub name: String,
+	pub product: String,
+	pub price: f64
+}
\ No newline at end of file