// SPDX-License-Identifier: AGPL-3.0-only
// SPDX-FileContributor: Runxi Yu <https://runxiyu.org>

package main

import (

	"errors"

	"io"
	"io/fs"
	"os"
	"path/filepath"
)

// deploy_hooks_to_filesystem deploys the git hooks client to the filesystem.
// The git hooks client is expected to be embedded in resources_fs and must be
// pre-compiled during the build process; see the Makefile.
func deploy_hooks_to_filesystem() (err error) {
	err = func() (err error) {
		var src_fd fs.File
		var dst_fd *os.File

		if src_fd, err = resources_fs.Open("git_hooks_client/git_hooks_client"); err != nil {
			return err
		}
		defer src_fd.Close()

		if dst_fd, err = os.OpenFile(filepath.Join(config.Hooks.Execs, "git_hooks_client"), os.O_WRONLY|os.O_CREATE|os.O_TRUNC, 0o755); err != nil {
			return err
		}
		defer dst_fd.Close()

		if _, err = io.Copy(dst_fd, src_fd); err != nil {
			return err
		}

		return nil
	}()
	if err != nil {
		return err
	}

	// Go's embed filesystems do not store permissions; but in any case,
	// they would need to be 0o755:
	if err = os.Chmod(filepath.Join(config.Hooks.Execs, "git_hooks_client"), 0o755); err != nil {
		return err
	}

	for _, hook_name := range []string{
		"pre-receive",
	} {
		if err = os.Symlink(filepath.Join(config.Hooks.Execs, "git_hooks_client"), filepath.Join(config.Hooks.Execs, hook_name)); err != nil {
			return err
		}
	}

	return nil
}

// SPDX-License-Identifier: AGPL-3.0-only
// SPDX-FileContributor: Runxi Yu <https://runxiyu.org>

package main

import (
	"bytes"
	"context"
	"encoding/binary"
	"errors"
	"fmt"
	"io"
	"net"
	"os"
	"path/filepath"
	"strconv"
	"strings"
	"syscall"

	"github.com/go-git/go-git/v5/plumbing"
	"github.com/go-git/go-git/v5/plumbing/object"
	"github.com/jackc/pgx/v5"
	"go.lindenii.runxiyu.org/lindenii-common/ansiec"
)

var (
	err_get_fd    = errors.New("unable to get file descriptor")
	err_get_ucred = errors.New("failed getsockopt")
)

// hooks_handle_connection handles a connection from git_hooks_client via the
// unix socket.
func hooks_handle_connection(conn net.Conn) {
	var ctx context.Context
	var cancel context.CancelFunc
	var ucred *syscall.Ucred
	var err error
	var cookie []byte
	var pack_to_hook pack_to_hook_t
	var ssh_stderr io.Writer
	var ok bool
	var hook_return_value byte

	defer conn.Close()
	ctx, cancel = context.WithCancel(context.Background())
	defer cancel()

	// There aren't reasonable cases where someone would run this as
	// another user.
	if ucred, err = get_ucred(conn); err != nil {
		if _, err = conn.Write([]byte{1}); err != nil {
			return
		}
		wf_error(conn, "\nUnable to get peer credentials: %v", err)
		return
	}
	if ucred.Uid != uint32(os.Getuid()) {
		if _, err = conn.Write([]byte{1}); err != nil {
			return
		}
		wf_error(conn, "\nUID mismatch")
		return
	}

	cookie = make([]byte, 64)
	if _, err = conn.Read(cookie); err != nil {
		if _, err = conn.Write([]byte{1}); err != nil {
			return
		}
		wf_error(conn, "\nFailed to read cookie: %v", err)
		return
	}

	pack_to_hook, ok = pack_to_hook_by_cookie.Load(string(cookie))
	if !ok {
		if _, err = conn.Write([]byte{1}); err != nil {
			return
		}
		wf_error(conn, "\nInvalid handler cookie")
		return
	}

	ssh_stderr = pack_to_hook.session.Stderr()

	ssh_stderr.Write([]byte{'\n'})

	_, _ = ssh_stderr.Write([]byte{'\n'})

	hook_return_value = func() byte {
		var argc64 uint64
		if err = binary.Read(conn, binary.NativeEndian, &argc64); err != nil {
			wf_error(ssh_stderr, "Failed to read argc: %v", err)
			return 1
		}
		var args []string
		for i := uint64(0); i < argc64; i++ {
			var arg bytes.Buffer
			for {
				b := make([]byte, 1)
				n, err := conn.Read(b)
				if err != nil || n != 1 {
					wf_error(ssh_stderr, "Failed to read arg: %v", err)
					return 1
				}
				if b[0] == 0 {
					break
				}
				arg.WriteByte(b[0])
			}
			args = append(args, arg.String())
		}

		var stdin bytes.Buffer
		if _, err = io.Copy(&stdin, conn); err != nil {
			wf_error(conn, "Failed to read to the stdin buffer: %v", err)
		}

		switch filepath.Base(args[0]) {
		case "pre-receive":
			if pack_to_hook.direct_access {
				return 0
			} else {
				all_ok := true
				for {
					var line, old_oid, rest, new_oid, ref_name string
					var found bool
					var old_hash, new_hash plumbing.Hash
					var old_commit, new_commit *object.Commit

					line, err = stdin.ReadString('\n')
					if errors.Is(err, io.EOF) {
						break
					} else if err != nil {
						wf_error(ssh_stderr, "Failed to read pre-receive line: %v", err)
						return 1
					}
					line = line[:len(line)-1]

					old_oid, rest, found = strings.Cut(line, " ")
					if !found {
						wf_error(ssh_stderr, "Invalid pre-receive line: %v", line)
						return 1
					}

					new_oid, ref_name, found = strings.Cut(rest, " ")
					if !found {
						wf_error(ssh_stderr, "Invalid pre-receive line: %v", line)
						return 1
					}

					if strings.HasPrefix(ref_name, "refs/heads/contrib/") {
						if all_zero_num_string(old_oid) { // New branch
							fmt.Fprintln(ssh_stderr, ansiec.Blue+"POK"+ansiec.Reset, ref_name)
							var new_mr_id int

							err = database.QueryRow(ctx,
								"INSERT INTO merge_requests (repo_id, creator, source_ref, status) VALUES ($1, $2, $3, 'open') RETURNING id",
								pack_to_hook.repo_id, pack_to_hook.user_id, strings.TrimPrefix(ref_name, "refs/heads/"),
							).Scan(&new_mr_id)
							if err != nil {
								wf_error(ssh_stderr, "Error creating merge request: %v", err)
								return 1
							}
							fmt.Fprintln(ssh_stderr, ansiec.Blue+"Created merge request at", generate_http_remote_url(pack_to_hook.group_name, pack_to_hook.repo_name)+"/contrib/"+strconv.FormatUint(uint64(new_mr_id), 10)+"/"+ansiec.Reset)
						} else { // Existing contrib branch
							var existing_merge_request_user_id int
							var is_ancestor bool

							err = database.QueryRow(ctx,
								"SELECT COALESCE(creator, 0) FROM merge_requests WHERE source_ref = $1 AND repo_id = $2",
								strings.TrimPrefix(ref_name, "refs/heads/"), pack_to_hook.repo_id,
							).Scan(&existing_merge_request_user_id)
							if err != nil {
								if errors.Is(err, pgx.ErrNoRows) {
									wf_error(ssh_stderr, "No existing merge request for existing contrib branch: %v", err)
								} else {
									wf_error(ssh_stderr, "Error querying for existing merge request: %v", err)
								}
								return 1
							}
							if existing_merge_request_user_id == 0 {
								all_ok = false
								fmt.Fprintln(ssh_stderr, ansiec.Red+"NAK"+ansiec.Reset, ref_name, "(branch belongs to unowned MR)")
								continue
							}

							if existing_merge_request_user_id != pack_to_hook.user_id {
								all_ok = false
								fmt.Fprintln(ssh_stderr, ansiec.Red+"NAK"+ansiec.Reset, ref_name, "(branch belongs another user's MR)")
								continue
							}

							old_hash = plumbing.NewHash(old_oid)

							if old_commit, err = pack_to_hook.repo.CommitObject(old_hash); err != nil {
								wf_error(ssh_stderr, "Daemon failed to get old commit: %v", err)
								return 1
							}

							// Potential BUG: I'm not sure if new_commit is guaranteed to be
							// detectable as they haven't been merged into the main repo's
							// objects yet. But it seems to work, and I don't think there's
							// any reason for this to only work intermitently.
							new_hash = plumbing.NewHash(new_oid)
							if new_commit, err = pack_to_hook.repo.CommitObject(new_hash); err != nil {
								wf_error(ssh_stderr, "Daemon failed to get new commit: %v", err)
								return 1
							}

							if is_ancestor, err = old_commit.IsAncestor(new_commit); err != nil {
								wf_error(ssh_stderr, "Daemon failed to check if old commit is ancestor: %v", err)
								return 1
							}

							if !is_ancestor {
								// TODO: Create MR snapshot ref instead
								all_ok = false
								fmt.Fprintln(ssh_stderr, ansiec.Red+"NAK"+ansiec.Reset, ref_name, "(force pushes are not supported yet)")
								continue
							}

							fmt.Fprintln(ssh_stderr, ansiec.Blue+"POK"+ansiec.Reset, ref_name)
						}
					} else { // Non-contrib branch
						all_ok = false
						fmt.Fprintln(ssh_stderr, ansiec.Red+"NAK"+ansiec.Reset, ref_name, "(you cannot push to branches outside of contrib/*)")
					}
				}

				fmt.Fprintln(ssh_stderr)
				if all_ok {
					fmt.Fprintln(ssh_stderr, "Overall "+ansiec.Green+"ACK"+ansiec.Reset+" (all checks passed)")
					return 0
				} else {
					fmt.Fprintln(ssh_stderr, "Overall "+ansiec.Red+"NAK"+ansiec.Reset+" (one or more branches failed checks)")
					return 1
				}
			}
		default:
			fmt.Fprintln(ssh_stderr, ansiec.Red+"Invalid hook:", args[0]+ansiec.Reset)
			return 1
		}
	}()

	fmt.Fprintln(ssh_stderr)

	_, _ = conn.Write([]byte{hook_return_value})
}

func serve_git_hooks(listener net.Listener) error {
	for {
		conn, err := listener.Accept()
		if err != nil {
			return err
		}
		go hooks_handle_connection(conn)
	}
}

func get_ucred(conn net.Conn) (ucred *syscall.Ucred, err error) {
	var unix_conn *net.UnixConn = conn.(*net.UnixConn)
	var fd *os.File

	if fd, err = unix_conn.File(); err != nil {
		return nil, err_get_fd
	}
	defer fd.Close()

	if ucred, err = syscall.GetsockoptUcred(int(fd.Fd()), syscall.SOL_SOCKET, syscall.SO_PEERCRED); err != nil {
		return nil, err_get_ucred
	}
	return ucred, nil
}

func all_zero_num_string(s string) bool {
	for _, r := range s {
		if r != '0' {
			return false
		}
	}
	return true
}

// SPDX-License-Identifier: AGPL-3.0-only
// SPDX-FileContributor: Runxi Yu <https://runxiyu.org>

package main

import (
	"fmt"
	"net/http"
	"strings"

	"github.com/go-git/go-git/v5"
	"github.com/go-git/go-git/v5/plumbing"
	"github.com/go-git/go-git/v5/plumbing/filemode"
	"github.com/go-git/go-git/v5/plumbing/format/diff"
	"github.com/go-git/go-git/v5/plumbing/object"
	"go.lindenii.runxiyu.org/lindenii-common/misc"
)

// The file patch type from go-git isn't really usable in HTML templates
// either.
type usable_file_patch_t struct {
	From   diff.File
	To     diff.File
	Chunks []usable_chunk
}

type usable_chunk struct {
	Operation diff.Operation
	Content   string
}

func handle_repo_commit(w http.ResponseWriter, r *http.Request, params map[string]any) {
	var repo *git.Repository
	var commit_id_specified_string, commit_id_specified_string_without_suffix string
	var commit_id plumbing.Hash
	var parent_commit_hash plumbing.Hash
	var commit_object *object.Commit
	var commit_id_string string
	var err error
	var patch *object.Patch

	repo, commit_id_specified_string = params["repo"].(*git.Repository), params["commit_id"].(string)

	commit_id_specified_string_without_suffix = strings.TrimSuffix(commit_id_specified_string, ".patch")
	commit_id = plumbing.NewHash(commit_id_specified_string_without_suffix)
	if commit_object, err = repo.CommitObject(commit_id); err != nil {
		http.Error(w, "Error getting commit object: "+err.Error(), http.StatusInternalServerError)
		return
	}
	if commit_id_specified_string_without_suffix != commit_id_specified_string {
		var formatted_patch string
		if formatted_patch, err = format_patch_from_commit(commit_object); err != nil {
			http.Error(w, "Error formatting patch: "+err.Error(), http.StatusInternalServerError)
			return
		}
		fmt.Fprintln(w, formatted_patch)
		return
	}
	commit_id_string = commit_object.Hash.String()

	if commit_id_string != commit_id_specified_string {
		http.Redirect(w, r, commit_id_string, http.StatusSeeOther)
		return
	}

	params["commit_object"] = commit_object
	params["commit_id"] = commit_id_string

	parent_commit_hash, patch, err = get_patch_from_commit(commit_object)
	if err != nil {
		http.Error(w, "Error getting patch from commit: "+err.Error(), http.StatusInternalServerError)
		return
	}
	params["parent_commit_hash"] = parent_commit_hash.String()
	params["patch"] = patch

	params["file_patches"] = make_usable_file_patches(patch)

	render_template(w, "repo_commit", params)
}

type fake_diff_file struct {
	hash plumbing.Hash
	mode filemode.FileMode
	path string
}

func (f fake_diff_file) Hash() plumbing.Hash {
	return f.hash
}

func (f fake_diff_file) Mode() filemode.FileMode {
	return f.mode
}

func (f fake_diff_file) Path() string {
	return f.path
}

var fake_diff_file_null = fake_diff_file{
	hash: plumbing.NewHash("0000000000000000000000000000000000000000"),
	mode: misc.First_or_panic(filemode.New("100644")),
	path: "",
}

func make_usable_file_patches(patch diff.Patch) (usable_file_patches []usable_file_patch) {

func make_usable_file_patches(patch diff.Patch) (usable_file_patches []usable_file_patch_t) {

	// TODO: Remove unnecessary context
	// TODO: Prepend "+"/"-"/" " instead of solely distinguishing based on color

	for _, file_patch := range patch.FilePatches() {
		var from, to diff.File
		var usable_file_patch usable_file_patch_t
		chunks := []usable_chunk{}

		from, to = file_patch.Files()
		if from == nil {
			from = fake_diff_file_null
		}
		if to == nil {
			to = fake_diff_file_null
		}
		for _, chunk := range file_patch.Chunks() {
			var content string

			content = chunk.Content()
			if len(content) > 0 && content[0] == '\n' {
				content = "\n" + content
			} // Horrible hack to fix how browsers newlines that immediately proceed <pre>
			chunks = append(chunks, usable_chunk{
				Operation: chunk.Type(),
				Content:   content,
			})
		}
		usable_file_patch = usable_file_patch_t{
			Chunks: chunks,
			From:   from,
			To:     to,
		}
		usable_file_patches = append(usable_file_patches, usable_file_patch)
	}
	return
}

// SPDX-License-Identifier: AGPL-3.0-only
// SPDX-FileContributor: Runxi Yu <https://runxiyu.org>

package main

import (
	"net/http"
	"strconv"

	"github.com/go-git/go-git/v5"
	"github.com/go-git/go-git/v5/plumbing"
	"github.com/go-git/go-git/v5/plumbing/object"
)

func handle_repo_contrib_one(w http.ResponseWriter, r *http.Request, params map[string]any) {
	var mr_id_string string
	var mr_id int
	var err error
	var title, status, source_ref, destination_branch string
	var repo *git.Repository
	var source_ref_hash plumbing.Hash
	var source_commit *object.Commit

	mr_id_string = params["mr_id"].(string)
	mr_id_int64, err := strconv.ParseInt(mr_id_string, 10, strconv.IntSize)
	if err != nil {
		http.Error(w, "Merge request ID not an integer: "+err.Error(), http.StatusBadRequest)
		return
	}
	mr_id = int(mr_id_int64)

	if err = database.QueryRow(r.Context(),
		"SELECT COALESCE(title, ''), status, source_ref, COALESCE(destination_branch, '') FROM merge_requests WHERE id = $1",
		mr_id,
	).Scan(&title, &status, &source_ref, &destination_branch); err != nil {
		http.Error(w, "Error querying merge request: "+err.Error(), http.StatusInternalServerError)
		return
	}

	repo = params["repo"].(*git.Repository)

	if source_ref_hash, err = get_ref_hash_from_type_and_name(repo, "branch", source_ref); err != nil {
		http.Error(w, "Error getting source ref hash: "+err.Error(), http.StatusInternalServerError)
		return
	}
	if source_commit, err = repo.CommitObject(source_ref_hash); err != nil {
		http.Error(w, "Error getting source commit: "+err.Error(), http.StatusInternalServerError)
		return
	}
	params["source_commit"] = source_commit

	var destination_branch_hash plumbing.Hash
	if destination_branch == "" {
		destination_branch = "HEAD"
		destination_branch_hash, err = get_ref_hash_from_type_and_name(repo, "", "")
	} else {
		destination_branch_hash, err = get_ref_hash_from_type_and_name(repo, "branch", destination_branch)

		if err != nil {
			http.Error(w, "Error getting destination branch hash: "+err.Error(), http.StatusInternalServerError)
			return
		}

	}
	if err != nil {
		http.Error(w, "Error getting destination branch hash: "+err.Error(), http.StatusInternalServerError)
		return

	}

	destination_commit, err := repo.CommitObject(destination_branch_hash)
	if err != nil {
		http.Error(w, "Error getting destination commit: "+err.Error(), http.StatusInternalServerError)
		return
	}
	params["destination_commit"] = destination_commit

	patch, err := destination_commit.Patch(source_commit)
	if err != nil {
		http.Error(w, "Error getting patch: "+err.Error(), http.StatusInternalServerError)
		return
	}
	params["file_patches"] = make_usable_file_patches(patch)

	params["mr_title"], params["mr_status"], params["mr_source_ref"], params["mr_destination_branch"] = title, status, source_ref, destination_branch

	render_template(w, "repo_contrib_one", params)
}

// SPDX-License-Identifier: AGPL-3.0-only
// SPDX-FileContributor: Runxi Yu <https://runxiyu.org>

package main

import (
	"errors"
	"fmt"
	"net/http"
	"strconv"
	"strings"

	"github.com/jackc/pgx/v5"
	"go.lindenii.runxiyu.org/lindenii-common/clog"
)

type http_router_t struct{}

func (router *http_router_t) ServeHTTP(w http.ResponseWriter, r *http.Request) {
	clog.Info("Incoming HTTP: " + r.RemoteAddr + " " + r.Method + " " + r.RequestURI)

	var segments []string
	var err error
	var non_empty_last_segments_len int

	var params map[string]any

	var separator_index int

	params := make(map[string]any)

	if segments, _, err = parse_request_uri(r.RequestURI); err != nil {
		http.Error(w, err.Error(), http.StatusBadRequest)
		return
	}
	non_empty_last_segments_len = len(segments)
	if segments[len(segments)-1] == "" {
		non_empty_last_segments_len--
	}

	if segments[0] == ":" {
		if len(segments) < 2 {
			http.Error(w, "Blank system endpoint", http.StatusNotFound)
			return
		} else if len(segments) == 2 && redirect_with_slash(w, r) {
			return
		}

		switch segments[1] {
		case "static":
			static_handler.ServeHTTP(w, r)
			return
		case "source":
			source_handler.ServeHTTP(w, r)
			return
		}
	}

	params["url_segments"] = segments
	params["global"] = global_data
	var _user_id int // 0 for none
	_user_id, params["username"], err = get_user_info_from_request(r)
	if errors.Is(err, http.ErrNoCookie) {
	} else if errors.Is(err, pgx.ErrNoRows) {
	} else if err != nil {
		http.Error(w, "Error getting user info from request: "+err.Error(), http.StatusInternalServerError)
		return
	}

	if _user_id == 0 {
		params["user_id"] = ""
	} else {
		params["user_id"] = strconv.Itoa(_user_id)
	}

	if segments[0] == ":" {
		switch segments[1] {
		case "login":
			handle_login(w, r, params)
			return
		case "users":
			handle_users(w, r, params)
			return
		default:
			http.Error(w, fmt.Sprintf("Unknown system module type: %s", segments[1]), http.StatusNotFound)
			return
		}
	}

	separator_index = -1
	for i, part := range segments {
		if part == ":" {
			separator_index = i
			break
		}
	}

	params["separator_index"] = separator_index

	// TODO
	if separator_index > 1 {
		http.Error(w, "Subgroups haven't been implemented yet", http.StatusNotImplemented)
		return
	}

	var module_type string
	var module_name string
	var group_name string

	switch {
	case non_empty_last_segments_len == 0:
		handle_index(w, r, params)
	case separator_index == -1:
		http.Error(w, "Group indexing hasn't been implemented yet", http.StatusNotImplemented)
	case non_empty_last_segments_len == separator_index+1:
		http.Error(w, "Group root hasn't been implemented yet", http.StatusNotImplemented)
	case non_empty_last_segments_len == separator_index+2:
		if redirect_with_slash(w, r) {
			return
		}
		module_type = segments[separator_index+1]
		params["group_name"] = segments[0]
		switch module_type {
		case "repos":
			handle_group_repos(w, r, params)
		default:
			http.Error(w, fmt.Sprintf("Unknown module type: %s", module_type), http.StatusNotFound)
		}
	default:
		module_type = segments[separator_index+1]
		module_name = segments[separator_index+2]
		group_name = segments[0]
		params["group_name"] = group_name
		switch module_type {
		case "repos":
			params["repo_name"] = module_name

			if non_empty_last_segments_len > separator_index+3 {
				switch segments[separator_index+3] {
				case "info":
					if err = handle_repo_info(w, r, params); err != nil {
						http.Error(w, err.Error(), http.StatusInternalServerError)
					}
					return
				case "git-upload-pack":
					if err = handle_upload_pack(w, r, params); err != nil {
						http.Error(w, err.Error(), http.StatusInternalServerError)
					}
					return
				}
			}

			if params["ref_type"], params["ref_name"], err = get_param_ref_and_type(r); err != nil {
				if errors.Is(err, err_no_ref_spec) {
					params["ref_type"] = ""
				} else {
					http.Error(w, "Error querying ref type: "+err.Error(), http.StatusInternalServerError)
					return
				}
			}

			// TODO: subgroups

			if params["repo"], params["repo_description"], params["repo_id"], err = open_git_repo(r.Context(), group_name, module_name); err != nil {
				http.Error(w, "Error opening repo: "+err.Error(), http.StatusInternalServerError)
				return
			}

			if non_empty_last_segments_len == separator_index+3 {
				if redirect_with_slash(w, r) {
					return
				}
				handle_repo_index(w, r, params)
				return
			}

			repo_feature := segments[separator_index+3]
			switch repo_feature {
			case "tree":
				params["rest"] = strings.Join(segments[separator_index+4:], "/")
				if len(segments) < separator_index+5 && redirect_with_slash(w, r) {
					return
				}
				handle_repo_tree(w, r, params)
			case "raw":
				params["rest"] = strings.Join(segments[separator_index+4:], "/")
				if len(segments) < separator_index+5 && redirect_with_slash(w, r) {
					return
				}
				handle_repo_raw(w, r, params)
			case "log":
				if non_empty_last_segments_len > separator_index+4 {
					http.Error(w, "Too many parameters", http.StatusBadRequest)
					return
				}
				if redirect_with_slash(w, r) {
					return
				}
				handle_repo_log(w, r, params)
			case "commit":
				if redirect_without_slash(w, r) {
					return
				}
				params["commit_id"] = segments[separator_index+4]
				handle_repo_commit(w, r, params)
			case "contrib":
				if redirect_with_slash(w, r) {
					return
				}
				switch non_empty_last_segments_len {
				case separator_index + 4:
					handle_repo_contrib_index(w, r, params)
				case separator_index + 5:
					params["mr_id"] = segments[separator_index+4]
					handle_repo_contrib_one(w, r, params)
				default:
					http.Error(w, "Too many parameters", http.StatusBadRequest)
				}
			default:
				http.Error(w, fmt.Sprintf("Unknown repo feature: %s", repo_feature), http.StatusNotFound)
			}
		default:
			http.Error(w, fmt.Sprintf("Unknown module type: %s", module_type), http.StatusNotFound)
		}
	}
}

// SPDX-License-Identifier: AGPL-3.0-only
// SPDX-FileContributor: Runxi Yu <https://runxiyu.org>

package main

import (
	"embed"
	"html/template"
	"io/fs"
	"net/http"
)

// We embed all source for easy AGPL compliance.
//
//go:embed .gitignore .gitattributes
//go:embed LICENSE README.md
//go:embed *.go go.mod go.sum
//go:embed *.scfg
//go:embed Makefile
//go:embed schema.sql
//go:embed static/* templates/*
//go:embed git_hooks_client/*.c
//go:embed vendor/*
var source_fs embed.FS

var source_handler = http.StripPrefix(
	"/:/source/",
	http.FileServer(http.FS(source_fs)),
)

//go:embed templates/* static/* git_hooks_client/git_hooks_client
var resources_fs embed.FS

var templates *template.Template

func load_templates() (err error) {
	templates, err = template.New("templates").Funcs(template.FuncMap{
		"first_line": first_line,
		"base_name":  base_name,
	}).ParseFS(resources_fs, "templates/*")
	return err
}

var static_handler http.Handler

func init() {

	if static_fs, err := fs.Sub(resources_fs, "static"); err != nil {

	static_fs, err := fs.Sub(resources_fs, "static")
	if err != nil {

		panic(err)
	}
	static_handler = http.StripPrefix("/:/static/", http.FileServer(http.FS(static_fs)))
}

// SPDX-License-Identifier: AGPL-3.0-only
// SPDX-FileContributor: Runxi Yu <https://runxiyu.org>

package main

import (
	"context"

	"github.com/jackc/pgx/v5"
)

func add_user_ssh(ctx context.Context, pubkey string) (user_id int, err error) {
	var tx pgx.Tx

	if tx, err = database.Begin(ctx); err != nil {
		return
	}

	defer tx.Rollback(ctx)

	defer func() {
		_ = tx.Rollback(ctx)
	}()

	if err = tx.QueryRow(ctx, `INSERT INTO users (type) VALUES ('pubkey_only') RETURNING id`).Scan(&user_id); err != nil {
		return
	}

	if _, err = tx.Exec(ctx, `INSERT INTO ssh_public_keys (key_string, user_id) VALUES ($1, $2)`, pubkey, user_id); err != nil {
		return
	}

	err = tx.Commit(ctx)
	return
}