refactor: consolidate handlers into single files

internal/vault/handlers/index/handlers.go

@@ -0,0 +1,48 @@
+package handlers
+
+import (
+	"net/http"
+
+	"github.com/labstack/echo/v4"
+	"github.com/onsonr/sonr/internal/vault/pages/index"
+	session "github.com/onsonr/sonr/internal/vault/session"
+	"github.com/onsonr/sonr/pkg/common/response"
+)
+
+func HandleIndex(c echo.Context) error {
+	if isInitial(c) {
+		return response.TemplEcho(c, index.InitialView())
+	}
+	if isExpired(c) {
+		return response.TemplEcho(c, index.ReturningView())
+	}
+	return c.Render(http.StatusOK, "index.templ", nil)
+}
+
+// ╭─────────────────────────────────────────────────────────╮
+// │                    Utility Functions                    │
+// ╰─────────────────────────────────────────────────────────╯
+
+// Initial users have no authorization, user handle, or vault address
+func isInitial(c echo.Context) bool {
+	noAuth := !session.HasAuthorization(c)
+	noUserHandle := !session.HasUserHandle(c)
+	noVaultAddress := !session.HasVaultAddress(c)
+	return noUserHandle && noVaultAddress && noAuth
+}
+
+// Expired users have either a user handle or vault address
+func isExpired(c echo.Context) bool {
+	noAuth := !session.HasAuthorization(c)
+	hasUserHandle := session.HasUserHandle(c)
+	hasVaultAddress := session.HasVaultAddress(c)
+	return noAuth && hasUserHandle || noAuth && hasVaultAddress
+}
+
+// Returning users have a valid authorization, and either a user handle or vault address
+func isReturning(c echo.Context) bool {
+	hasAuth := session.HasAuthorization(c)
+	hasUserHandle := session.HasUserHandle(c)
+	hasVaultAddress := session.HasVaultAddress(c)
+	return hasAuth && (hasUserHandle || hasVaultAddress)
+}