[#810, github-backed example][xl]: improve looks, improve README, rename from simple-example to github-backed (#864)

examples/github-backed-catalog/lib/octokit.ts

@@ -0,0 +1,147 @@
+import { Octokit } from 'octokit';
+
+export interface GithubProject {
+  owner: string;
+  repo: string;
+  branch: string;
+  files: string[];
+  readme: string;
+  description?: string;
+  name?: string;
+}
+
+export async function getProjectReadme(
+  owner: string,
+  repo: string,
+  branch: string,
+  readme: string,
+  github_pat?: string
+) {
+  const octokit = new Octokit({ auth: github_pat });
+  try {
+    const response = await octokit.rest.repos.getContent({
+      owner,
+      repo,
+      path: readme,
+      ref: branch,
+    });
+    const data = response.data as { content?: string };
+    const fileContent = data.content ? data.content : '';
+    if (fileContent === '') {
+      return null;
+    }
+    const decodedContent = Buffer.from(fileContent, 'base64').toString();
+    return decodedContent;
+  } catch (error) {
+    console.log(error);
+    return null;
+  }
+}
+
+export async function getLastUpdated(
+  owner: string,
+  repo: string,
+  branch: string,
+  readme: string,
+  github_pat?: string
+) {
+  const octokit = new Octokit({ auth: github_pat });
+  try {
+    const response = await octokit.rest.repos.listCommits({
+      owner,
+      repo,
+      path: readme,
+      ref: branch,
+    });
+    return response.data[0].commit.committer.date;
+  } catch (error) {
+    console.log(error);
+    return null;
+  }
+}
+export async function getProjectMetadata(
+  owner: string,
+  repo: string,
+  github_pat?: string
+) {
+  const octokit = new Octokit({ auth: github_pat });
+  try {
+    const response = await octokit.rest.repos.get({
+      owner,
+      repo,
+    });
+    return response.data;
+  } catch (error) {
+    console.log(error);
+    return null;
+  }
+}
+
+export async function getRepoContents(
+  owner: string,
+  repo: string,
+  branch: string,
+  files: string[],
+  github_pat?: string
+) {
+  const octokit = new Octokit({ auth: github_pat });
+  try {
+    const contents = [];
+    for (const path of files) {
+      const response = await octokit.rest.repos.getContent({
+        owner,
+        repo,
+        ref: branch,
+        path: path,
+      });
+      const data = response.data as { download_url?: string, name: string, size: number };
+      contents.push({ download_url: data.download_url, name: data.name, size: data.size});
+    }
+    return contents;
+  } catch (error) {
+    console.log(error);
+    return null;
+  }
+}
+
+export async function getProject(project: GithubProject, github_pat?: string) {
+  const projectMetadata = await getProjectMetadata(
+    project.owner,
+    project.repo,
+    github_pat
+  );
+  if (!projectMetadata) {
+    return null;
+  }
+  const projectReadme = await getProjectReadme(
+    project.owner,
+    project.repo,
+    project.branch,
+    project.readme,
+    github_pat
+  );
+  if (!projectReadme) {
+    return null;
+  }
+  const projectData = await getRepoContents(
+    project.owner,
+    project.repo,
+    project.branch,
+    project.files,
+    github_pat
+  );
+  if (!projectData) {
+    return null;
+  }
+  const projectBase = project.readme.split('/').length > 1
+      ? project.readme.split('/').slice(0, -1).join('/')
+      : '/'
+  const last_updated = await getLastUpdated(
+    project.owner,
+    project.repo,
+    project.branch,
+    projectBase,
+    github_pat
+  );
+  return { ...projectMetadata, files: projectData, readmeContent: projectReadme, last_updated, base_path: projectBase };
+}