Initial commit: git-issue-commit CLI tool

src/fetcher/gitlab.rs

@@ -0,0 +1,82 @@
+use anyhow::{Result, Context};
+use regex::Regex;
+use reqwest::{Client, header::HeaderMap};
+use serde::Deserialize;
+use std::env;
+
+#[derive(Deserialize)]
+struct GitLabIssueResponse {
+    iid: u64,
+    title: String,
+    description: Option<String>,
+    web_url: String,
+    author: Option<GitLabAuthor>,
+    labels: Option<Vec<String>>,
+    state: Option<String>,
+}
+
+#[derive(Deserialize)]
+struct GitLabAuthor {
+    username: String,
+}
+
+pub async fn fetch_gitlab_issue(url: &str) -> Result<super::IssueContent> {
+    let (project_id, number) = parse_gitlab_url(url)?;
+
+    let client = Client::new();
+    let token = env::var("GITLAB_TOKEN").ok();
+
+    let mut headers = HeaderMap::new();
+    if let Some(ref token) = token {
+        headers.insert("PRIVATE-TOKEN", token.parse()?);
+    }
+
+    let api_url = env::var("GITLAB_API_URL").unwrap_or_else(|_| "https://gitlab.com/api/v4".to_string());
+    let project_encoded = project_id.replace("/", "%2F");
+    let issue_url = format!("{}/projects/{}/issues/{}", api_url, project_encoded, number);
+
+    let response = client
+        .get(&issue_url)
+        .headers(headers)
+        .send()
+        .await
+        .with_context(|| "Failed to fetch GitLab issue")?;
+
+    if !response.status().is_success() {
+        anyhow::bail!("Failed to fetch GitLab issue: HTTP {}", response.status());
+    }
+
+    let issue: GitLabIssueResponse = response.json().await
+        .with_context(|| "Failed to parse GitLab response")?;
+
+    let labels = issue.labels.unwrap_or_default();
+    let author = issue.author.map(|a| a.username).unwrap_or_default();
+
+    Ok(super::IssueContent {
+        title: issue.title,
+        body: issue.description.unwrap_or_default(),
+        number: issue.iid,
+        url: issue.web_url,
+        labels,
+        author,
+        state: issue.state.unwrap_or_default(),
+    })
+}
+
+fn parse_gitlab_url(url: &str) -> Result<(String, u64)> {
+    let re = regex::Regex::new(r"gitlab\.com/([a-zA-Z0-9._/-]+)/-/?(?:issues|merge_requests)/(\d+)")?;
+    let caps = re.captures(url)
+        .ok_or_else(|| anyhow::anyhow!("Invalid GitLab URL format: {}", url))?;
+
+    let project_id = caps.get(1)
+        .ok_or_else(|| anyhow::anyhow!("Could not extract project ID"))?
+        .as_str()
+        .to_string();
+
+    let number = caps.get(2)
+        .ok_or_else(|| anyhow::anyhow!("Could not extract issue number"))?
+        .as_str()
+        .parse::<u64>()?;
+
+    Ok((project_id, number))
+}