package main

import (

	"fmt"

	"net/http"
)

func handle_group_repos(w http.ResponseWriter, r *http.Request, params map[string]any) {
	group_name := params["group_name"]

	var names []string
	rows, err := database.Query(r.Context(), "SELECT r.name FROM repos r JOIN groups g ON r.group_id = g.id WHERE g.name = $1;", group_name)
	if err != nil {

		_, _ = w.Write([]byte("Error getting groups: " + err.Error()))

		fmt.Fprintln(w, "Error getting groups:", err.Error())

		return
	}
	defer rows.Close()

	for rows.Next() {
		var name string
		if err := rows.Scan(&name); err != nil {

			_, _ = w.Write([]byte("Error scanning row: " + err.Error()))

			fmt.Fprintln(w, "Error scanning row:", err.Error())

			return
		}
		names = append(names, name)
	}

	if err := rows.Err(); err != nil {

		_, _ = w.Write([]byte("Error iterating over rows: " + err.Error()))

		fmt.Fprintln(w, "Error iterating over rows:", err.Error())

		return
	}

	params["repos"] = names

	err = templates.ExecuteTemplate(w, "group_repos", params)
	if err != nil {

		_, _ = w.Write([]byte("Error rendering template: " + err.Error()))

		fmt.Fprintln(w, "Error rendering template:", err.Error())

		return
	}
}

package main

import (

	"fmt"

	"net/http"
)

func handle_index(w http.ResponseWriter, r *http.Request, params map[string]any) {
	rows, err := database.Query(r.Context(), "SELECT name FROM groups")
	if err != nil {

		_, _ = w.Write([]byte("Error querying groups: " + err.Error()))

		fmt.Fprintln(w, "Error querying groups: " + err.Error())

		return
	}
	defer rows.Close()

	groups := []string{}
	for rows.Next() {
		var groupName string
		if err := rows.Scan(&groupName); err != nil {

			_, _ = w.Write([]byte("Error scanning group name: " + err.Error()))

			fmt.Fprintln(w, "Error scanning group name: " + err.Error())

			return
		}
		groups = append(groups, groupName)
	}

	if err := rows.Err(); err != nil {

		_, _ = w.Write([]byte("Error iterating over rows: " + err.Error()))

		fmt.Fprintln(w, "Error iterating over rows: " + err.Error())

		return
	}

	params["groups"] = groups

	err = templates.ExecuteTemplate(w, "index", params)
	if err != nil {

		_, _ = w.Write([]byte("Error rendering template: " + err.Error()))

		fmt.Fprintln(w, "Error rendering template: " + err.Error())

		return
	}
}

package main

import (

	"fmt"

	"net/http"
)

func handle_login(w http.ResponseWriter, r *http.Request, params map[string]any) {
	if r.Method != "POST" {
		err := templates.ExecuteTemplate(w, "login", params)
		if err != nil {

			_, _ = w.Write([]byte("Error rendering template: " + err.Error()))

			fmt.Fprintln(w, "Error rendering template:", err.Error())

			return
		}
	}

	_ = r.PostFormValue("username")
	_ = r.PostFormValue("password")
}

package main

import (

	"fmt"

	"net/http"
	"strings"

	"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"
	"go.lindenii.runxiyu.org/lindenii-common/misc"
)

type usable_file_patch struct {
	From   diff.File
	To     diff.File
	Chunks []diff.Chunk
}

func handle_repo_commit(w http.ResponseWriter, r *http.Request, params map[string]any) {
	group_name, repo_name, commit_id_specified_string := params["group_name"].(string), params["repo_name"].(string), params["commit_id"].(string)
	repo, err := open_git_repo(r.Context(), group_name, repo_name)
	if err != nil {

		_, _ = w.Write([]byte("Error opening repo: " + err.Error()))

		fmt.Fprintln(w, "Error opening repo:", err.Error())

		return
	}
	commit_id_specified_string_without_suffix := strings.TrimSuffix(commit_id_specified_string, ".patch")
	commit_id := plumbing.NewHash(commit_id_specified_string_without_suffix)
	commit_object, err := repo.CommitObject(commit_id)
	if err != nil {

		_, _ = w.Write([]byte("Error getting commit object: " + err.Error()))

		fmt.Fprintln(w, "Error getting commit object:", err.Error())

		return
	}
	if commit_id_specified_string_without_suffix != commit_id_specified_string {
		patch, err := format_patch_from_commit(commit_object)
		if err != nil {

			_, _ = w.Write([]byte("Error formatting patch: " + err.Error()))

			fmt.Fprintln(w, "Error formatting patch:", err.Error())

			return
		}

		_, _ = w.Write([]byte(patch))

		fmt.Fprintln(w, 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 {

		_, _ = w.Write([]byte("Error getting patch from commit: " + err.Error()))

		fmt.Fprintln(w, "Error getting patch from commit:", err.Error())

		return
	}
	params["parent_commit_hash"] = parent_commit_hash.String()
	params["patch"] = patch

	// TODO: Remove unnecessary context

	// TODO: Remove unnecessary context                                          

	// TODO: Prepend "+"/"-"/" " instead of solely distinguishing based on color
	usable_file_patches := make([]usable_file_patch, 0)
	for _, file_patch := range patch.FilePatches() {
		from, to := file_patch.Files()
		if from == nil {
			from = fake_diff_file_null
		}
		if to == nil {
			to = fake_diff_file_null
		}
		usable_file_patch := usable_file_patch{
			Chunks: file_patch.Chunks(),
			From:   from,
			To:     to,
		}
		usable_file_patches = append(usable_file_patches, usable_file_patch)
	}
	params["file_patches"] = usable_file_patches

	err = templates.ExecuteTemplate(w, "repo_commit", params)
	if err != nil {

		_, _ = w.Write([]byte("Error rendering template: " + err.Error()))

		fmt.Fprintln(w, "Error rendering template:", err.Error())

		return
	}
}

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("e69de29bb2d1d6434b8b29ae775ad8c2e48c5391"),
	mode: misc.First_or_panic(filemode.New("100644")),
	path: "",
}

package main

import (

	"fmt"

	"net/http"
	"net/url"
)

func handle_repo_index(w http.ResponseWriter, r *http.Request, params map[string]any) {
	group_name, repo_name := params["group_name"].(string), params["repo_name"].(string)
	repo, err := open_git_repo(r.Context(), group_name, repo_name)
	if err != nil {

		_, _ = w.Write([]byte("Error opening repo: " + err.Error()))

		fmt.Fprintln(w, "Error opening repo:", err.Error())

		return
	}
	head, err := repo.Head()
	if err != nil {

		_, _ = w.Write([]byte("Error getting repo HEAD: " + err.Error()))

		fmt.Fprintln(w, "Error getting repo HEAD:", err.Error())

		return
	}
	params["ref"] = head.Name().Short()
	head_hash := head.Hash()
	recent_commits, err := get_recent_commits(repo, head_hash, 3)
	if err != nil {

		_, _ = w.Write([]byte("Error getting recent commits: " + err.Error()))

		fmt.Fprintln(w, "Error getting recent commits:", err.Error())

		return
	}
	params["commits"] = recent_commits
	commit_object, err := repo.CommitObject(head_hash)
	if err != nil {

		_, _ = w.Write([]byte("Error getting commit object: " + err.Error()))

		fmt.Fprintln(w, "Error getting commit object:", err.Error())

		return
	}
	tree, err := commit_object.Tree()
	if err != nil {

		_, _ = w.Write([]byte("Error getting file tree: " + err.Error()))

		fmt.Fprintln(w, "Error getting file tree:", err.Error())

		return
	}

	params["readme_filename"], params["readme"] = render_readme_at_tree(tree)
	params["files"] = build_display_git_tree(tree)

	params["clone_url"] = "ssh://" + r.Host + "/" + url.PathEscape(group_name) + "/:/repos/" + url.PathEscape(repo_name)

	err = templates.ExecuteTemplate(w, "repo_index", params)
	if err != nil {

		_, _ = w.Write([]byte("Error rendering template: " + err.Error()))

		fmt.Fprintln(w, "Error rendering template:", err.Error())

		return
	}
}

package main

import (

	"fmt"

	"net/http"

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

// TODO: I probably shouldn't include *all* commits here...
func handle_repo_log(w http.ResponseWriter, r *http.Request, params map[string]any) {
	group_name, repo_name, ref_name := params["group_name"].(string), params["repo_name"].(string), params["ref"].(string)
	repo, err := open_git_repo(r.Context(), group_name, repo_name)
	if err != nil {

		_, _ = w.Write([]byte("Error opening repo: " + err.Error()))

		fmt.Fprintln(w, "Error opening repo:", err.Error())

		return
	}
	ref, err := repo.Reference(plumbing.NewBranchReferenceName(ref_name), true)
	if err != nil {

		_, _ = w.Write([]byte("Error getting repo reference: " + err.Error()))

		fmt.Fprintln(w, "Error getting repo reference:", err.Error())

		return
	}
	ref_hash := ref.Hash()
	commits, err := get_recent_commits(repo, ref_hash, -1)
	if err != nil {

		_, _ = w.Write([]byte("Error getting recent commits: " + err.Error()))

		fmt.Fprintln(w, "Error getting recent commits:", err.Error())

		return
	}
	params["commits"] = commits

	err = templates.ExecuteTemplate(w, "repo_log", params)
	if err != nil {

		_, _ = w.Write([]byte("Error rendering template: " + err.Error()))

		fmt.Fprintln(w, "Error rendering template:", err.Error())

		return
	}
}

package main

import (

	"fmt"

	"errors"
	"net/http"
	"path"
	"strings"

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

func handle_repo_raw(w http.ResponseWriter, r *http.Request, params map[string]any) {
	raw_path_spec := params["rest"].(string)
	group_name, repo_name, path_spec := params["group_name"].(string), params["repo_name"].(string), strings.TrimSuffix(raw_path_spec, "/")

	ref_type, ref_name, err := get_param_ref_and_type(r)
	if err != nil {
		if errors.Is(err, err_no_ref_spec) {
			ref_type = "head"
		} else {

			_, _ = w.Write([]byte("Error querying ref type: " + err.Error()))

			fmt.Fprintln(w, "Error querying ref type:", err.Error())

			return
		}
	}

	params["ref_type"], params["ref"], params["path_spec"] = ref_type, ref_name, path_spec

	repo, err := open_git_repo(r.Context(), group_name, repo_name)
	if err != nil {

		_, _ = w.Write([]byte("Error opening repo: " + err.Error()))

		fmt.Fprintln(w, "Error opening repo:", err.Error())

		return
	}

	ref_hash, err := get_ref_hash_from_type_and_name(repo, ref_type, ref_name)
	if err != nil {

		_, _ = w.Write([]byte("Error getting ref hash: " + err.Error()))

		fmt.Fprintln(w, "Error getting ref hash:", err.Error())

		return
	}

	commit_object, err := repo.CommitObject(ref_hash)
	if err != nil {

		_, _ = w.Write([]byte("Error getting commit object: " + err.Error()))

		fmt.Fprintln(w, "Error getting commit object:", err.Error())

		return
	}
	tree, err := commit_object.Tree()
	if err != nil {

		_, _ = w.Write([]byte("Error getting file tree: " + err.Error()))

		fmt.Fprintln(w, "Error getting file tree:", err.Error())

		return
	}

	var target *object.Tree
	if path_spec == "" {
		target = tree
	} else {
		target, err = tree.Tree(path_spec)
		if err != nil {
			file, err := tree.File(path_spec)
			if err != nil {

				_, _ = w.Write([]byte("Error retrieving path: " + err.Error()))

				fmt.Fprintln(w, "Error retrieving path:", err.Error())

				return
			}
			if len(raw_path_spec) != 0 && raw_path_spec[len(raw_path_spec)-1] == '/' {
				http.Redirect(w, r, "../"+path_spec, http.StatusSeeOther)
				return
			}
			file_contents, err := file.Contents()
			if err != nil {

				_, _ = w.Write([]byte("Error reading file: " + err.Error()))

				fmt.Fprintln(w, "Error reading file:", err.Error())

				return
			}

			_, _ = w.Write([]byte(file_contents))

			fmt.Fprintln(w, file_contents)

			return
		}
	}

	if len(raw_path_spec) != 0 && raw_path_spec[len(raw_path_spec)-1] != '/' {
		http.Redirect(w, r, path.Base(path_spec)+"/", http.StatusSeeOther)
		return
	}

	params["files"] = build_display_git_tree(target)

	err = templates.ExecuteTemplate(w, "repo_raw_dir", params)
	if err != nil {

		_, _ = w.Write([]byte("Error rendering template: " + err.Error()))

		fmt.Fprintln(w, "Error rendering template:", err.Error())

		return
	}
}

package main

import (
	"bytes"
	"errors"

	"fmt"

	"html/template"
	"net/http"
	"path"
	"strings"

	chroma_formatters_html "github.com/alecthomas/chroma/v2/formatters/html"
	chroma_lexers "github.com/alecthomas/chroma/v2/lexers"
	chroma_styles "github.com/alecthomas/chroma/v2/styles"
	"github.com/go-git/go-git/v5/plumbing/object"
)

func handle_repo_tree(w http.ResponseWriter, r *http.Request, params map[string]any) {
	raw_path_spec := params["rest"].(string)
	group_name, repo_name, path_spec := params["group_name"].(string), params["repo_name"].(string), strings.TrimSuffix(raw_path_spec, "/")
	ref_type, ref_name, err := get_param_ref_and_type(r)
	if err != nil {
		if errors.Is(err, err_no_ref_spec) {
			ref_type = "head"
		} else {

			_, _ = w.Write([]byte("Error querying ref type: " + err.Error()))

			fmt.Fprintln(w, "Error querying ref type:", err.Error())

			return
		}
	}
	params["ref_type"], params["ref"], params["path_spec"] = ref_type, ref_name, path_spec
	repo, err := open_git_repo(r.Context(), group_name, repo_name)
	if err != nil {

		_, _ = w.Write([]byte("Error opening repo: " + err.Error()))

		fmt.Fprintln(w, "Error opening repo:", err.Error())

		return
	}
	ref_hash, err := get_ref_hash_from_type_and_name(repo, ref_type, ref_name)
	if err != nil {

		_, _ = w.Write([]byte("Error getting ref hash: " + err.Error()))

		fmt.Fprintln(w, "Error getting ref hash:", err.Error())

		return
	}
	commit_object, err := repo.CommitObject(ref_hash)
	if err != nil {

		_, _ = w.Write([]byte("Error getting commit object: " + err.Error()))

		fmt.Fprintln(w, "Error getting commit object:", err.Error())

		return
	}
	tree, err := commit_object.Tree()
	if err != nil {

		_, _ = w.Write([]byte("Error getting file tree: " + err.Error()))

		fmt.Fprintln(w, "Error getting file tree:", err.Error())

		return
	}

	var target *object.Tree
	if path_spec == "" {
		target = tree
	} else {
		target, err = tree.Tree(path_spec)
		if err != nil {
			file, err := tree.File(path_spec)
			if err != nil {

				_, _ = w.Write([]byte("Error retrieving path: " + err.Error()))

				fmt.Fprintln(w, "Error retrieving path:", err.Error())

				return
			}
			if len(raw_path_spec) != 0 && raw_path_spec[len(raw_path_spec)-1] == '/' {
				http.Redirect(w, r, "../"+path_spec, http.StatusSeeOther)
				return
			}
			file_contents, err := file.Contents()
			if err != nil {

				_, _ = w.Write([]byte("Error reading file: " + err.Error()))

				fmt.Fprintln(w, "Error reading file:", err.Error())

				return
			}
			lexer := chroma_lexers.Match(path_spec)
			if lexer == nil {
				lexer = chroma_lexers.Fallback
			}
			iterator, err := lexer.Tokenise(nil, file_contents)
			if err != nil {

				_, _ = w.Write([]byte("Error tokenizing code: " + err.Error()))

				fmt.Fprintln(w, "Error tokenizing code:", err.Error())

				return
			}
			var formatted_unencapsulated bytes.Buffer
			style := chroma_styles.Get("autumn")
			formatter := chroma_formatters_html.New(chroma_formatters_html.WithClasses(true), chroma_formatters_html.TabWidth(8))
			err = formatter.Format(&formatted_unencapsulated, style, iterator)
			if err != nil {

				_, _ = w.Write([]byte("Error formatting code: " + err.Error()))

				fmt.Fprintln(w, "Error formatting code:", err.Error())

				return
			}
			formatted_encapsulated := template.HTML(formatted_unencapsulated.Bytes())
			params["file_contents"] = formatted_encapsulated

			err = templates.ExecuteTemplate(w, "repo_tree_file", params)
			if err != nil {

				_, _ = w.Write([]byte("Error rendering template: " + err.Error()))

				fmt.Fprintln(w, "Error rendering template:", err.Error())

				return
			}
			return
		}
	}

	if len(raw_path_spec) != 0 && raw_path_spec[len(raw_path_spec)-1] != '/' {
		http.Redirect(w, r, path.Base(path_spec)+"/", http.StatusSeeOther)
		return
	}

	params["readme_filename"], params["readme"] = render_readme_at_tree(target)
	params["files"] = build_display_git_tree(target)

	err = templates.ExecuteTemplate(w, "repo_tree_dir", params)
	if err != nil {

		_, _ = w.Write([]byte("Error rendering template: " + err.Error()))

		fmt.Fprintln(w, "Error rendering template:", err.Error())

		return
	}
}