cmd/pkgserver: add status endpoint

cmd/pkgserver/main.go

@@ -1,9 +1,26 @@
 package main
 
 import (
+	"bytes"
+	"cmp"
+	"context"
 	"embed"
 	"fmt"
+	"io"
+	"log"
 	"net/http"
+	"os"
+	"os/signal"
+	"path"
+	"slices"
+	"strings"
+	"syscall"
+
+	"hakurei.app/command"
+	"hakurei.app/container/check"
+	"hakurei.app/internal/pkg"
+	"hakurei.app/internal/rosa"
+	"hakurei.app/message"
 )
 
 //go:generate sh -c "sass ui/static/dark.scss ui/static/dark.css && sass ui/static/light.scss ui/static/light.css && tsc ui/static/index.ts"
@@ -43,13 +60,170 @@ func serveStaticContent(w http.ResponseWriter, r *http.Request) {
 
 	}
 }
-func serveAPI(w http.ResponseWriter, r *http.Request) {
+func serveAPI(index *PackageIndex) func(w http.ResponseWriter, r *http.Request) {
+	return func(w http.ResponseWriter, r *http.Request) {}
+}
 
+func serveStatus(index *PackageIndex) func(w http.ResponseWriter, r *http.Request) {
+	return func(w http.ResponseWriter, r *http.Request) {
+		if index == nil {
+			http.Error(w, "index is nil", http.StatusInternalServerError)
+			return
+		}
+		base := path.Base(r.URL.Path)
+		name := strings.TrimSuffix(base, ".log")
+		p, ok := rosa.ResolveName(name)
+		if !ok {
+			http.NotFound(w, r)
+			return
+		}
+		m := rosa.GetMetadata(p)
+		pk, ok := index.names[m.Name]
+		if !ok {
+			http.NotFound(w, r)
+			return
+		}
+		if len(pk.status) > 0 {
+			w.Header().Set("Content-Type", "text/plain; charset=utf-8")
+			w.Header().Set("Cache-Control", "no-cache, no-store, must-revalidate")
+			w.WriteHeader(http.StatusOK)
+			_, err := io.Copy(w, bytes.NewReader(pk.status))
+			if err != nil {
+				http.Error(w, err.Error(), http.StatusInternalServerError)
+			}
+		} else {
+			http.NotFound(w, r)
+		}
+	}
+}
+
+type SortOrders int
+
+const (
+	DeclarationAscending SortOrders = iota
+	DeclarationDescending
+	NameAscending
+	NameDescending
+	limitSortOrders
+)
+
+type PackageIndex struct {
+	sorts [limitSortOrders][rosa.PresetUnexportedStart]*PackageIndexEntry
+	names map[string]*PackageIndexEntry
+}
+
+type PackageIndexEntry struct {
+	Name        string `json:"name"`
+	Description string `json:"description"`
+	Website     string `json:"website"`
+	Version     string `json:"version"`
+	status      []byte
+}
+
+func createPackageIndex(cache *pkg.Cache, report *rosa.Report) (_ *PackageIndex, err error) {
+	index := new(PackageIndex)
+	index.names = make(map[string]*PackageIndexEntry, rosa.PresetUnexportedStart)
+	work := make([]PackageIndexEntry, rosa.PresetUnexportedStart)
+	defer report.HandleAccess(&err)()
+	for p := range rosa.PresetUnexportedStart {
+		m := rosa.GetMetadata(p)
+		v := rosa.Std.Version(p)
+		a := rosa.Std.Load(p)
+		id := cache.Ident(a)
+		st, n := report.ArtifactOf(id)
+		var status []byte
+		if n < 1 {
+			status = nil
+		} else {
+			status = st
+		}
+		log.Printf("Processing package %s...\n", m.Name)
+		entry := PackageIndexEntry{
+			Name:        m.Name,
+			Description: m.Description,
+			Website:     m.Website,
+			Version:     v,
+			status:      status,
+		}
+		work[p] = entry
+		index.names[m.Name] = &entry
+	}
+	for i, p := range work {
+		index.sorts[DeclarationAscending][i] = &p
+	}
+	slices.Reverse(work)
+	for i, p := range work {
+		index.sorts[DeclarationDescending][i] = &p
+	}
+	slices.SortFunc(work, func(a PackageIndexEntry, b PackageIndexEntry) int {
+		return cmp.Compare(a.Name, b.Name)
+	})
+	for i, p := range work {
+		index.sorts[NameAscending][i] = &p
+	}
+	slices.Reverse(work)
+	for i, p := range work {
+		index.sorts[NameDescending][i] = &p
+	}
+	return index, err
 }
 func main() {
+	log.SetFlags(0)
+	log.SetPrefix("pkgserver: ")
+
+	var (
+		flagBaseDir string
+		flagPort    int
+	)
+
+	ctx, stop := signal.NotifyContext(context.Background(), syscall.SIGINT, syscall.SIGTERM, syscall.SIGHUP)
+	defer stop()
+	msg := message.New(log.Default())
+
+	c := command.New(os.Stderr, log.Printf, "pkgserver", func(args []string) error {
+		reportPath := args[0]
+		baseDir, err := check.NewAbs(flagBaseDir)
+		if err != nil {
+			return err
+		}
+		log.Println("baseDir:", baseDir)
+		cache, err := pkg.Open(ctx, msg, 0, baseDir)
+		if err != nil {
+			return err
+		}
+		report, err := rosa.OpenReport(reportPath)
+		if err != nil {
+			return err
+		}
+		log.Println("reportPath:", reportPath)
+		log.Println("indexing packages...")
+		index, err := createPackageIndex(cache, report)
+		if err != nil {
+			return err
+		}
+		log.Println("created package index")
 		http.HandleFunc("GET /{$}", serveWebUI)
 		http.HandleFunc("GET /favicon.ico", serveStaticContent)
 		http.HandleFunc("GET /static/", serveStaticContent)
-	http.HandleFunc("GET /api/", serveAPI)
+		http.HandleFunc("GET /api/", serveAPI(index))
-	http.ListenAndServe(":8067", nil)
+		http.HandleFunc("GET /api/status/", serveStatus(index))
+		log.Println("listening on", flagPort)
+		err = http.ListenAndServe(fmt.Sprintf(":%d", flagPort), nil)
+		if err != nil {
+			return err
+		}
+		return nil
+	}).Flag(
+		&flagBaseDir,
+		"b", command.StringFlag(""),
+		"base directory for cache",
+	).Flag(
+		&flagPort,
+		"p", command.IntFlag(8067),
+		"http listen port",
+	)
+	c.MustParse(os.Args[1:], func(e error) {
+		log.Fatal(e)
+	})
+
 }