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+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "0120db82e8a1e0b9fb3345a539c478767c0048d842860994d96113d5b667bd69"
+dependencies = [
+ "winapi 0.3.9",
+]
+
+[[package]]
+name = "winutil"
+version = "0.1.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "7daf138b6b14196e3830a588acf1e86966c694d3e8fb026fb105b8b5dca07e6e"
+dependencies = [
+ "winapi 0.3.9",
+]
+
+[[package]]
+name = "ws2_32-sys"
+version = "0.2.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "d59cefebd0c892fa2dd6de581e937301d8552cb44489cdff035c6187cb63fa5e"
+dependencies = [
+ "winapi 0.2.8",
+ "winapi-build",
+]

diff --git a/Cargo.toml b/Cargo.toml
new file mode 100644 (file)
index 0000000..48907fb
--- /dev/null
+++ b/Cargo.toml
@@ -0,0 +1,21 @@
+[package]
+name = "rtx3080"
+version = "0.1.0"
+authors = ["Grégory Burri <gregory.burri@matisa.ch>"]
+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", "json"] }
+scraper = "0.12"
+lettre = "0.9"
+lettre_email = "0.9"
+itertools = "0.9"
+native-tls = "0.2"
+serde = { version = "1.0", features = ["derive"] }
+ron = "0.6" # Rust object notation, to load configuration files.
+
+[profile.release]
+codegen-units = 1
+lto = true

diff --git a/src/main.rs b/src/main.rs
new file mode 100644 (file)
index 0000000..412d17c
--- /dev/null
+++ b/src/main.rs
@@ -0,0 +1,133 @@
+use std::{ thread, time, fs::File };
+use scraper::{ Html, Selector };
+use lettre::{
+    ClientSecurity,
+    ClientTlsParameters,
+    Transport,
+    SmtpClient,
+    smtp::{
+        ConnectionReuseParameters,
+        authentication::{
+            Credentials,
+            Mechanism
+        }
+    }
+};
+use lettre_email::Email;
+use native_tls::{Protocol, TlsConnector};
+use ron::{ de::from_reader, ser::to_writer };
+use serde::{ Deserialize, Serialize };
+
+#[derive(Debug, Deserialize, Serialize)]
+struct Config {
+    smtp_login: String,
+    smtp_password: String
+}
+
+fn get_default_config() -> Config { Config { smtp_login: "login".to_string(), smtp_password: "password".to_string() } }
+const FILE_CONF: &str = "config.ron";
+
+fn main() -> Result<(), Box<dyn std::error::Error>> {
+    println!("I need a RTX 3080 right now :)");
+
+    let to_find = "RTX 3080";
+    let to_match = "3080";
+
+    let config: Config =
+        match File::open(FILE_CONF) {
+            Ok(file) => match from_reader(file) { Ok(c) => c, Err(e) => panic!("Failed to load config: {}", e)},
+            Err(_) => {
+                let file = File::create(FILE_CONF)?;
+                let default_config = get_default_config();
+                to_writer(file, &default_config)?;
+                default_config
+            }
+        };
+
+    let selector = Selector::parse("div.productGridElement > h2 > a:nth-child(1)").unwrap();
+
+    loop {
+        let url = format!("https://www.steg-electronics.ch/fr/search?suche={}", to_find);
+        println!("Request: {}", url);
+        let resp = reqwest::blocking::get(&url)?;
+
+        if resp.status().is_success() {
+            let html = resp.text()?;
+            let document = Html::parse_document(&html);
+
+            // A vector of (<title>, <url>), empty if nothing matches.
+            let match_items: Vec<(String, String)> =
+                document.select(&selector).filter_map(
+                    |element| {
+                        if let (Some(title), Some(url_to_item)) = (element.value().attr("title"), element.value().attr("href")) {
+                            if title.find(to_match).is_some() {
+                                return Some((String::from(title), String::from(url_to_item)))
+                            }
+                        }
+                        None
+                    }
+                ).collect();
+
+            if match_items.is_empty() {
+                println!("No matches...");
+            } else if send_email(&match_items[..], &config.smtp_login, &config.smtp_password) {
+                println!("Some matches has been found! An e-mail has been sent!");
+                return Ok(())
+            } else {
+                println!("Unable to send e-mail");
+            }
+        } else {
+            println!("Request unsuccessful:\n{:#?}", resp);
+        }
+
+        thread::sleep(time::Duration::from_secs(60)); // 1 min.
+    }
+}
+
+/// Return 'true' if the email has been successfully sent.
+fn send_email(items: &[(String, String)], login: &str, password: &str) -> bool {
+
+    let items_list_html =
+        items.iter().fold(
+            String::new(),
+            |acc, (title, url)| {
+                format!("{}\n<li><a href=\"{}\">{}</a></li>", acc, url, title)
+            }
+        );
+
+    let email = Email::builder()
+        // Addresses can be specified by the tuple (email, alias)
+        .to(("greg.burri@gmail.com", "Greg Burri"))
+        .from("redmine@d-lan.net")
+        .subject("RTX 3080 AVAILABLE!")
+        .html(format!("<ul>{}</ul>", items_list_html))
+        .build()
+        .unwrap()
+        .into();
+
+    let mut tls_builder = TlsConnector::builder();
+    tls_builder.min_protocol_version(Some(Protocol::Tlsv10));
+    let tls_parameters =
+        ClientTlsParameters::new(
+            "mail.gandi.net".to_string(),
+            tls_builder.build().unwrap()
+        );
+
+    let mut mailer =
+        SmtpClient::new(("mail.gandi.net", 465), ClientSecurity::Wrapper(tls_parameters)).unwrap()
+            .authentication_mechanism(Mechanism::Login)
+            .smtp_utf8(true)
+            .credentials(Credentials::new(String::from(login), String::from(password)))
+            .connection_reuse(ConnectionReuseParameters::ReuseUnlimited)
+            .transport();
+
+    let result = mailer.send(email);
+
+    if result.is_err() {
+        println!("Error when sending E-mail:\n{:?}", &result);
+    }
+
+    mailer.close();
+
+    result.is_ok()
+}