linters:
  enable-all: true
  disable:
    - tenv
    - depguard
    - err113           # dynamically defined errors are fine for our purposes
    - forcetypeassert  # type assertion failures are usually programming errors
    - gochecknoglobals # doesn't matter since this isn't a library
    - gochecknoinits   # we use inits sparingly for good reasons
    - godox            # they're just used as markers for where needs improvements
    - ireturn          # doesn't work well with how we use generics
    - lll              # long lines are acceptable
    - mnd              # it's a bit ridiculous to replace all of them
    - nakedret         # patterns should be consistent
    - nonamedreturns   # i like named returns
    - wrapcheck        # wrapping all errors is just not necessary

    - maintidx   # e
    - nestif     # e
    - gocognit   # e
    - gocyclo    # e
    - cyclop     # e
    - goconst    # e
    - funlen     # e
    - wsl        # e
    - nlreturn   # e

    - maintidx    # e
    - nestif      # e
    - gocognit    # e
    - gocyclo     # e
    - cyclop      # e
    - goconst     # e
    - funlen      # e
    - wsl         # e
    - nlreturn    # e
    - unused      # e
    - exhaustruct # e

issues:
  max-issues-per-linter: 0
  max-same-issues: 0

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

package main

import (
	"bufio"
	"context"
	"errors"
	"os"

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

var database *pgxpool.Pool

var config struct {
	HTTP struct {
		Net          string `scfg:"net"`
		Addr         string `scfg:"addr"`
		CookieExpiry int    `scfg:"cookie_expiry"`
		Root         string `scfg:"root"`

		ReadTimeout  uint   `scfg:"read_timeout"`
		WriteTimeout uint   `scfg:"write_timeout"`
		IdleTimeout  uint   `scfg:"idle_timeout"`

		ReadTimeout  uint32 `scfg:"read_timeout"`
		WriteTimeout uint32 `scfg:"write_timeout"`
		IdleTimeout  uint32 `scfg:"idle_timeout"`

		ReverseProxy bool   `scfg:"reverse_proxy"`
	} `scfg:"http"`
	Hooks struct {
		Socket string `scfg:"socket"`
		Execs  string `scfg:"execs"`
	} `scfg:"hooks"`
	Git struct {
		RepoDir string `scfg:"repo_dir"`
	} `scfg:"git"`
	SSH struct {
		Net  string `scfg:"net"`
		Addr string `scfg:"addr"`
		Key  string `scfg:"key"`
		Root string `scfg:"root"`
	} `scfg:"ssh"`
	IRC struct {
		Net   string `scfg:"net"`
		Addr  string `scfg:"addr"`
		TLS   bool   `scfg:"tls"`
		SendQ uint   `scfg:"sendq"`
		Nick  string `scfg:"nick"`
		User  string `scfg:"user"`
		Gecos string `scfg:"gecos"`
	} `scfg:"irc"`
	General struct {
		Title string `scfg:"title"`
	} `scfg:"general"`
	DB struct {
		Type string `scfg:"type"`
		Conn string `scfg:"conn"`
	} `scfg:"db"`
}

func loadConfig(path string) (err error) {
	var configFile *os.File
	var decoder *scfg.Decoder

	if configFile, err = os.Open(path); err != nil {
		return err
	}
	defer configFile.Close()

	decoder = scfg.NewDecoder(bufio.NewReader(configFile))
	if err = decoder.Decode(&config); err != nil {
		return err
	}

	if config.DB.Type != "postgres" {
		return errors.New("unsupported database type")
	}

	if database, err = pgxpool.New(context.Background(), config.DB.Conn); err != nil {
		return err
	}

	globalData["forge_title"] = config.General.Title

	return nil
}

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

package main

import (
	"bytes"

	"fmt"

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

	"github.com/alecthomas/chroma/v2"
	chromaHTML "github.com/alecthomas/chroma/v2/formatters/html"
	chromaLexers "github.com/alecthomas/chroma/v2/lexers"
	chromaStyles "github.com/alecthomas/chroma/v2/styles"
	"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 httpHandleRepoTree(writer http.ResponseWriter, request *http.Request, params map[string]any) {
	var rawPathSpec, pathSpec string
	var repo *git.Repository
	var refHash plumbing.Hash
	var refHashSlice []byte
	var commitObject *object.Commit
	var tree *object.Tree
	var err error

	rawPathSpec = params["rest"].(string)
	repo, pathSpec = params["repo"].(*git.Repository), strings.TrimSuffix(rawPathSpec, "/")
	params["path_spec"] = pathSpec

	if refHash, err = getRefHash(repo, params["ref_type"].(string), params["ref_name"].(string)); err != nil {
		errorPage500(writer, params, "Error getting ref hash: "+err.Error())
		return
	}
	refHashSlice = refHash[:]

	cacheHandle := append(refHashSlice, []byte(pathSpec)...)

	fmt.Printf("%#v\n", string(cacheHandle))

	if value, found := treeReadmeCache.Get(cacheHandle); found {
		params["files"] = value.DisplayTree
		params["readme_filename"] = value.ReadmeFilename
		params["readme"] = value.ReadmeRendered
		renderTemplate(writer, "repo_tree_dir", params)
		return
	}

	if value, found := commitPathFileHTMLCache.Get(cacheHandle); found {
		params["file_contents"] = value
		renderTemplate(writer, "repo_tree_file", params)
		return
	}
	start := time.Now()

	fmt.Println("miss")

	var target *object.Tree
	if pathSpec == "" {
		if commitObject, err = repo.CommitObject(refHash); err != nil {
			errorPage500(writer, params, "Error getting commit object: "+err.Error())
			return
		}
		if tree, err = commitObject.Tree(); err != nil {
			errorPage500(writer, params, "Error getting file tree: "+err.Error())
			return
		}

		displayTree := makeDisplayTree(tree)
		readmeFilename, readmeRendered := renderReadmeAtTree(tree)
		cost := time.Since(start).Nanoseconds()

		params["files"] = displayTree
		params["readme_filename"] = readmeFilename
		params["readme"] = readmeRendered

		entry := treeReadmeCacheEntry{
			DisplayTree:    displayTree,
			ReadmeFilename: readmeFilename,
			ReadmeRendered: readmeRendered,
		}
		treeReadmeCache.Set(cacheHandle, entry, cost)

		renderTemplate(writer, "repo_tree_dir", params)
		return
	}

	if commitObject, err = repo.CommitObject(refHash); err != nil {
		errorPage500(writer, params, "Error getting commit object: "+err.Error())
		return
	}
	if tree, err = commitObject.Tree(); err != nil {
		errorPage500(writer, params, "Error getting file tree: "+err.Error())
		return
	}
	if target, err = tree.Tree(pathSpec); err != nil {
		var file *object.File
		var fileContent string
		var lexer chroma.Lexer
		var iterator chroma.Iterator
		var style *chroma.Style
		var formatter *chromaHTML.Formatter
		var formattedHTML template.HTML

		if file, err = tree.File(pathSpec); err != nil {
			errorPage500(writer, params, "Error retrieving path: "+err.Error())
			return
		}
		if redirectNoDir(writer, request) {
			return
		}
		if fileContent, err = file.Contents(); err != nil {
			errorPage500(writer, params, "Error reading file: "+err.Error())
			return
		}
		lexer = chromaLexers.Match(pathSpec)
		if lexer == nil {
			lexer = chromaLexers.Fallback
		}
		if iterator, err = lexer.Tokenise(nil, fileContent); err != nil {
			errorPage500(writer, params, "Error tokenizing code: "+err.Error())
			return
		}
		var formattedHTMLStr bytes.Buffer
		style = chromaStyles.Get("autumn")
		formatter = chromaHTML.New(chromaHTML.WithClasses(true), chromaHTML.TabWidth(8))
		if err = formatter.Format(&formattedHTMLStr, style, iterator); err != nil {
			errorPage500(writer, params, "Error formatting code: "+err.Error())
			return
		}
		formattedHTML = template.HTML(formattedHTMLStr.Bytes()) //#nosec G203
		cost := time.Since(start).Nanoseconds()

		commitPathFileHTMLCache.Set(cacheHandle, formattedHTML, cost)

		params["file_contents"] = formattedHTML

		renderTemplate(writer, "repo_tree_file", params)
		return
	}

	if len(rawPathSpec) != 0 && rawPathSpec[len(rawPathSpec)-1] != '/' {
		http.Redirect(writer, request, path.Base(pathSpec)+"/", http.StatusSeeOther)
		return
	}

	displayTree := makeDisplayTree(target)
	readmeFilename, readmeRendered := renderReadmeAtTree(target)
	cost := time.Since(start).Nanoseconds()

	entry := treeReadmeCacheEntry{
		DisplayTree:    displayTree,
		ReadmeFilename: readmeFilename,
		ReadmeRendered: readmeRendered,
	}

	fmt.Println(treeReadmeCache.Set(cacheHandle, entry, cost))

	treeReadmeCache.Set(cacheHandle, entry, cost)

	params["readme_filename"], params["readme"] = readmeFilename, readmeRendered
	params["files"] = displayTree

	renderTemplate(writer, "repo_tree_dir", params)
}