patent 0.2.0

A prior-art search for your code ideas — has this dev tool already been shipped?
Documentation 
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//! Maven Central source — `GET https://search.maven.org/solrsearch/select`.
//!
//! The search API returns artifact coordinates but no descriptions, so the
//! artifact name is the main signal for ranking.

use serde::Deserialize;

use super::SourceAdapter;
use crate::model::{Match, Query, Source};
use crate::Result;

const DEFAULT_BASE_URL: &str = "https://search.maven.org";

#[derive(Debug, Clone)]
pub struct Maven {
    client: reqwest::Client,
    base_url: String,
}

impl Maven {
    pub fn new(client: reqwest::Client) -> Self {
        Self::with_base_url(client, DEFAULT_BASE_URL.to_string())
    }

    pub fn with_base_url(client: reqwest::Client, base_url: String) -> Self {
        Self { client, base_url }
    }
}

#[derive(Debug, Deserialize)]
struct SolrResponse {
    response: SolrDocs,
}

#[derive(Debug, Deserialize)]
struct SolrDocs {
    docs: Vec<SolrDoc>,
}

#[derive(Debug, Deserialize)]
struct SolrDoc {
    #[serde(default)]
    g: String,
    #[serde(default)]
    a: String,
    #[serde(default, rename = "versionCount")]
    version_count: Option<u64>,
}

#[async_trait::async_trait]
impl SourceAdapter for Maven {
    fn id(&self) -> Source {
        Source::Maven
    }

    async fn search(&self, query: &Query) -> Result<Vec<Match>> {
        let url = format!("{}/solrsearch/select", self.base_url);
        let q = query.keywords.join(" ");

        let body: SolrResponse = self
            .client
            .get(&url)
            .query(&[("q", q.as_str()), ("rows", "20"), ("wt", "json")])
            .send()
            .await?
            .error_for_status()?
            .json()
            .await?;

        Ok(body
            .response
            .docs
            .into_iter()
            .map(|d| {
                let name = format!("{}:{}", d.g, d.a);
                let url = format!("https://central.sonatype.com/artifact/{}/{}", d.g, d.a);
                Match {
                    description: d.g.clone(),
                    name,
                    source: Source::Maven,
                    url,
                    popularity: d.version_count,
                    similarity: 0.0,
                }
            })
            .collect())
    }
}