new styling for frontpage, update login and authorize templates (#46)

* new styling for frontpage, update login and authorize templates

* run go fmt

* add AssetBaseDir to command flag parsing

* untested: move landing page to it's own router

* go fmt, fix typo

* fix package, adapt to proper Route structure

internal/web/base.go

@@ -0,0 +1,85 @@
+/*
+   GoToSocial
+   Copyright (C) 2021 GoToSocial Authors admin@gotosocial.org
+
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU Affero General Public License as published by
+   the Free Software Foundation, either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU Affero General Public License for more details.
+
+   You should have received a copy of the GNU Affero General Public License
+   along with this program.  If not, see <http://www.gnu.org/licenses/>.
+*/
+
+package web
+
+import (
+	"fmt"
+	"net/http"
+	"os"
+	"path/filepath"
+
+	"github.com/gin-contrib/static"
+	"github.com/gin-gonic/gin"
+	"github.com/sirupsen/logrus"
+	"github.com/superseriousbusiness/gotosocial/internal/api"
+	"github.com/superseriousbusiness/gotosocial/internal/config"
+	"github.com/superseriousbusiness/gotosocial/internal/processing"
+	"github.com/superseriousbusiness/gotosocial/internal/router"
+)
+
+type Module struct {
+	config    *config.Config
+	processor processing.Processor
+	log       *logrus.Logger
+}
+
+func New(config *config.Config, processor processing.Processor, log *logrus.Logger) api.ClientModule {
+	return &Module{
+		config:    config,
+		log:       log,
+		processor: processor,
+	}
+}
+
+func (m *Module) baseHandler(c *gin.Context) {
+	l := m.log.WithField("func", "BaseGETHandler")
+	l.Trace("serving index html")
+
+	instance, err := m.processor.InstanceGet(m.config.Host)
+	if err != nil {
+		l.Debugf("error getting instance from processor: %s", err)
+		c.JSON(http.StatusInternalServerError, gin.H{"error": "internal server error"})
+		return
+	}
+
+	// FIXME: fill in more variables?
+	c.HTML(http.StatusOK, "index.tmpl", gin.H{
+		"instance":      instance,
+		"countUsers":    3,
+		"countStatuses": 42069,
+		"version":       "1.0.0",
+		"adminUsername": "@admin",
+	})
+}
+
+// Route satisfies the RESTAPIModule interface
+func (m *Module) Route(s router.Router) error {
+
+	// serve static files from /assets
+	cwd, err := os.Getwd()
+	if err != nil {
+		return fmt.Errorf("error getting current working directory: %s", err)
+	}
+	assetPath := filepath.Join(cwd, m.config.TemplateConfig.AssetBaseDir)
+	s.AttachMiddleware(static.Serve("/assets", static.LocalFile(assetPath, false)))
+
+	// serve front-page
+	s.AttachHandler(http.MethodGet, "/", m.baseHandler)
+	return nil
+}