helper.go

package main

import (
	"context"
	"fmt"

	"github.com/google/go-github/v66/github"
	"github.com/xanzy/go-gitlab"
)

func getGithubPullRequest(ctx context.Context, org, repo string, prNumber int) (*github.PullRequest, error) {
	var err error
	cacheToken := fmt.Sprintf("%s/%s/%d", org, repo, prNumber)
	pullRequest := cache.getGithubPullRequest(cacheToken)
	if pullRequest == nil {
		logger.Debug("retrieving pull request details", "owner", org, "repo", repo, "pr_number", prNumber)
		pullRequest, _, err = gh.PullRequests.Get(ctx, org, repo, prNumber)
		if err != nil {
			return nil, fmt.Errorf("retrieving pull request: %v", err)
		}

		if pullRequest == nil {
			return nil, fmt.Errorf("nil pull request was returned: %d", prNumber)
		}

		logger.Trace("caching pull request details", "owner", org, "repo", repo, "pr_number", prNumber)
		cache.setGithubPullRequest(cacheToken, *pullRequest)
	}

	return pullRequest, nil
}

func getGithubSearchResults(ctx context.Context, query string) (*github.IssuesSearchResult, error) {
	var err error
	result := cache.getGithubSearchResults(query)
	if result == nil {
		logger.Debug("performing search", "query", query)
		result, _, err = gh.Search.Issues(ctx, query, nil)
		if err != nil {
			return nil, fmt.Errorf("performing issue search: %v", err)
		}

		if result == nil {
			return nil, fmt.Errorf("nil search result was returned for query: %s", query)
		}

		logger.Trace("caching GitHub search result", "query", query)
		cache.setGithubSearchResults(query, *result)
	}

	return result, nil
}

func getGithubUser(ctx context.Context, username string) (*github.User, error) {
	var err error
	user := cache.getGithubUser(username)
	if user == nil {
		logger.Debug("retrieving user details", "username", username)
		if user, _, err = gh.Users.Get(ctx, username); err != nil {
			return nil, err
		}

		if user == nil {
			return nil, fmt.Errorf("nil user was returned: %s", username)
		}

		logger.Trace("caching GitHub user", "username", username)
		cache.setGithubUser(username, *user)
	}

	if user.Type == nil {
		return nil, fmt.Errorf("unable to determine whether owner is a user or organisatition: %s", username)
	}

	return user, nil
}

func getGitlabUser(username string) (*gitlab.User, error) {
	user := cache.getGitlabUser(username)
	if user == nil {
		logger.Debug("retrieving user details", "username", username)
		users, _, err := gl.Users.ListUsers(&gitlab.ListUsersOptions{Username: &username})
		if err != nil {
			return nil, err
		}

		for _, user = range users {
			if user != nil && user.Username == username {
				logger.Trace("caching GitLab user", "username", username)
				cache.setGitlabUser(username, *user)

				return user, nil
			}
		}

		return nil, fmt.Errorf("GitLab user not found: %s", username)
	}

	return user, nil
}

func pointer[T any](v T) *T {
	return &v
}