1 files changed, 99 insertions, 0 deletions
diff --git a/index.go b/index.go
new file mode 100644
index 0000000..9b53b6c
--- /dev/null
+++ b/index.go
@@ -0,0 +1,99 @@
+package main
+
+import (
+	"context"
+	"errors"
+	"fmt"
+	"log"
+	"net/http"
+
+	"github.com/jackc/pgx/v5"
+)
+
+func handle_index(w http.ResponseWriter, req *http.Request) {
+	session_cookie, err := req.Cookie("session")
+	if errors.Is(err, http.ErrNoCookie) {
+		err = tmpl.ExecuteTemplate(
+			w,
+			"index_login",
+			map[string]string{
+				"authUrl": generate_authorization_url(),
+			},
+		)
+		if err != nil {
+			log.Println(err)
+			return
+		}
+		return
+	} else if err != nil {
+		w.Header().Set("Content-Type", "text/plain; charset=utf-8")
+		w.WriteHeader(400)
+		w.Write([]byte(fmt.Sprintf(
+			"Error\n" +
+				"Unable to check cookie.",
+		)))
+		return
+	}
+	var userid string
+	var expr int
+	err = db.QueryRow(context.Background(), "SELECT userid, expr FROM sessions WHERE cookie = $1", session_cookie.Value).Scan(&userid, &expr)
+	if err != nil {
+		if errors.Is(err, pgx.ErrNoRows) {
+			err = tmpl.ExecuteTemplate(
+				w,
+				"index_login",
+				map[string]interface{}{
+					"authUrl": generate_authorization_url(),
+					"notes":   []string{"Technically you have a session cookie, but it seems invalid."},
+				},
+			)
+			if err != nil {
+				log.Println(err)
+				return
+			}
+			return
+		} else {
+			w.Header().Set("Content-Type", "text/plain; charset=utf-8")
+			w.WriteHeader(500)
+			w.Write([]byte(fmt.Sprintf(
+				"Error\nUnexpected database error.\n%s\n",
+				err,
+			)))
+			return
+		}
+	}
+	var name string
+	err = db.QueryRow(context.Background(), "SELECT name FROM users WHERE id = $1", userid).Scan(&name)
+	if err != nil {
+		if errors.Is(err, pgx.ErrNoRows) {
+			w.Header().Set("Content-Type", "text/plain; charset=utf-8")
+			w.WriteHeader(500)
+			w.Write([]byte(fmt.Sprintf(
+				"Error\nYour user doesn't exist. (This looks like a data integrity error.)\n%s\n",
+				err,
+			)))
+			return
+		} else {
+			w.Header().Set("Content-Type", "text/plain; charset=utf-8")
+			w.WriteHeader(500)
+			w.Write([]byte(fmt.Sprintf(
+				"Error\nUnexpected database error.\n%s\n",
+				err,
+			)))
+			return
+		}
+	}
+	err = tmpl.ExecuteTemplate(
+		w,
+		"index",
+		map[string]interface{}{
+			"user": map[string]interface{}{
+				"Name": name,
+			},
+		},
+	)
+	if err != nil {
+		log.Println(err)
+		return
+	}
+}