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package server
import (
"bytes"
"context"
"io"
"log/slog"
"net/http"
"slices"
"strings"
"sync"
"time"
"github.com/jpappel/atlas/pkg/data"
"github.com/jpappel/atlas/pkg/index"
"github.com/jpappel/atlas/pkg/query"
)
type Server interface {
ListenAndServe() error
Shutdown(context.Context) error
}
func info(w http.ResponseWriter, r *http.Request) {
w.Write([]byte(`<h1>Atlas Server</h1>
<p>This is the experimental atlas server!
Try POSTing a query to <pre>/search</pre></p>
<hr>
<p>You can sort the results using the query param <pre>sortBy</pre>
<ul>
<li>path</li>
<li>title</li>
<li>date</li>
<li>headings</li>
<li>filetime</li>
<li>meta</li>
</ul>
You can change the order using <pre>sortOrder</pre> with <pre>asc</pre> or <pre>desc</pre>
</p>
<form action="/search" method="post">
<fieldset><legend>Submit a Query</legend>
<label for="query">Query:</label>
<input type="text" name="query" required />
<input type="submit" />
</fieldset>
</form>
`))
}
func NewMux(db *data.Query) *http.ServeMux {
mux := http.NewServeMux()
outputBufPool := &sync.Pool{}
outputBufPool.New = func() any {
return &bytes.Buffer{}
}
mux.HandleFunc("/", info)
mux.HandleFunc("POST /search", func(w http.ResponseWriter, r *http.Request) {
b := &strings.Builder{}
r.ParseForm()
if v := r.Form.Get("query"); v != "" {
slog.Debug("parsing form, got value", slog.String("value", v))
b.WriteString(v)
} else if _, err := io.Copy(b, r.Body); err != nil {
w.WriteHeader(http.StatusInternalServerError)
w.Write([]byte("Error processing request"))
slog.Error("Error reading request body", slog.String("err", err.Error()))
return
}
artifact, err := query.Compile(b.String(), 0, 1)
if err != nil {
w.WriteHeader(http.StatusBadRequest)
w.Write([]byte(err.Error()))
slog.Error("Error compiling query", slog.String("err", err.Error()))
return
}
pathDocs, err := db.Execute(r.Context(), artifact)
if err != nil {
w.WriteHeader(http.StatusInternalServerError)
w.Write([]byte("Error executing query"))
slog.Error("Error executing query", slog.String("err", err.Error()))
return
}
docs := make([]*index.Document, 0, len(pathDocs))
var maxFileTime time.Time
for _, doc := range pathDocs {
docs = append(docs, doc)
if doc.FileTime.After(maxFileTime) {
maxFileTime = doc.FileTime
}
}
queryParams := r.URL.Query()
if queryParams.Has("sortBy") {
sortBy := queryParams.Get("sortBy")
sortOrder := queryParams.Get("sortOrder")
docCmp, ok := index.NewDocCmp(sortBy, sortOrder == "desc" || sortOrder == "descending")
if ok {
slices.SortFunc(docs, docCmp)
}
}
if !maxFileTime.IsZero() {
w.Header().Add("Last-Modified", maxFileTime.UTC().Format(http.TimeFormat))
}
buf, ok := outputBufPool.Get().(*bytes.Buffer)
if !ok {
panic("Expected *bytes.Buffer in pool")
}
_, err = query.JsonOutput{}.OutputTo(buf, docs)
if err != nil {
w.WriteHeader(http.StatusInternalServerError)
w.Write([]byte("Error while writing output"))
slog.Error("Error writing json output", slog.String("err", err.Error()))
}
http.ServeContent(w, r, "result.json", maxFileTime, bytes.NewReader(buf.Bytes()))
})
return mux
}
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