test: Add examples usages

examples/query-database.rs

@@ -0,0 +1,76 @@
+use std::collections::hash_map::DefaultHasher;
+use std::hash::{Hash, Hasher};
+use std::io::{self, Write};
+use std::path::PathBuf;
+use std::error::Error;
+
+use serde_derive::{Serialize, Deserialize};
+use structopt::StructOpt;
+
+use meilidb::database::Database;
+
+#[derive(Debug, StructOpt)]
+pub struct Opt {
+    /// The destination where the database must be created
+    #[structopt(parse(from_os_str))]
+    pub database_path: PathBuf,
+}
+
+#[derive(Debug, Serialize, Deserialize)]
+#[allow(non_snake_case)]
+struct Document {
+    skuId: String,
+    fr_FR_commercialName: String,
+    en_GB_commercialName: String,
+    maketingColorInternalName: String,
+    materialInternalName: String,
+    fr_FR_description: String,
+    en_GB_description: String,
+}
+
+fn calculate_hash<T: Hash>(t: &T) -> u64 {
+    let mut s = DefaultHasher::new();
+    t.hash(&mut s);
+    s.finish()
+}
+
+fn main() -> Result<(), Box<Error>> {
+    let opt = Opt::from_args();
+
+    let (elapsed, result) = elapsed::measure_time(|| Database::open(&opt.database_path));
+    let database = result?;
+    println!("database opened in {}", elapsed);
+
+    let mut buffer = String::new();
+    let input = io::stdin();
+
+    loop {
+        print!("Search: ");
+        io::stdout().flush()?;
+
+        if input.read_line(&mut buffer)? == 0 { break }
+
+        let view = database.view();
+
+        let (elapsed, documents) = elapsed::measure_time(|| {
+            let builder = view.query_builder().unwrap();
+            builder.query(&buffer, 10)
+        });
+
+        let mut full_documents = Vec::with_capacity(documents.len());
+
+        for document in documents {
+            match view.retrieve_document::<Document>(document.id) {
+                Ok(document) => full_documents.push(document),
+                Err(e) => eprintln!("{}", e),
+            }
+        }
+
+        println!("{:#?}", full_documents);
+        println!("{}", elapsed);
+
+        buffer.clear();
+    }
+
+    Ok(())
+}