[feature] Web profile pages for accounts (#449)

* add default avatars

* allow webModule to error

* return errWithCode from account get

* add AccountGetLocalByUsername

* check nil requesting account

* add timestampShort function for just month/year

* move loading logic to New + add default avatars

* add profile page view

* update swagger docs

* add excludeReblogs to GetAccountStatuses

* ignore casing when selecting local account by username

* appropriate redirects

* css fiddling

* add 'about' heading

* adjust thread page to work with routing

* return AP representation if requested + authorized

* simplify auth check

* go fmt

* golangci-lint ignore math/rand

internal/web/profile.go

@@ -0,0 +1,139 @@
+/*
+   GoToSocial
+   Copyright (C) 2021-2022 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 (
+	"context"
+	"encoding/json"
+	"fmt"
+	"math/rand"
+	"net/http"
+
+	"github.com/gin-gonic/gin"
+	"github.com/sirupsen/logrus"
+	"github.com/spf13/viper"
+	"github.com/superseriousbusiness/gotosocial/internal/ap"
+	"github.com/superseriousbusiness/gotosocial/internal/api"
+	"github.com/superseriousbusiness/gotosocial/internal/config"
+	"github.com/superseriousbusiness/gotosocial/internal/oauth"
+)
+
+func (m *Module) profileTemplateHandler(c *gin.Context) {
+	l := logrus.WithField("func", "profileTemplateHandler")
+	l.Trace("rendering profile template")
+	ctx := c.Request.Context()
+
+	username := c.Param(usernameKey)
+	if username == "" {
+		c.JSON(http.StatusBadRequest, gin.H{"error": "no account username specified"})
+		return
+	}
+
+	authed, err := oauth.Authed(c, false, false, false, false)
+	if err != nil {
+		l.Errorf("error authing profile GET request: %s", err)
+		c.JSON(http.StatusInternalServerError, gin.H{"error": "internal server error"})
+		return
+	}
+
+	instance, errWithCode := m.processor.InstanceGet(ctx, viper.GetString(config.Keys.Host))
+	if errWithCode != nil {
+		l.Debugf("error getting instance from processor: %s", errWithCode.Error())
+		c.JSON(errWithCode.Code(), gin.H{"error": errWithCode.Safe()})
+		return
+	}
+
+	account, errWithCode := m.processor.AccountGetLocalByUsername(ctx, authed, username)
+	if errWithCode != nil {
+		l.Debugf("error getting account from processor: %s", errWithCode.Error())
+		if errWithCode.Code() == http.StatusNotFound {
+			m.NotFoundHandler(c)
+			return
+		}
+		c.JSON(errWithCode.Code(), gin.H{"error": errWithCode.Safe()})
+		return
+	}
+
+	// if we're getting an AP request on this endpoint we should render the account's AP representation instead
+	accept := c.NegotiateFormat(string(api.TextHTML), string(api.AppActivityJSON), string(api.AppActivityLDJSON))
+	if accept == string(api.AppActivityJSON) || accept == string(api.AppActivityLDJSON) {
+		m.returnAPRepresentation(ctx, c, username, accept)
+		return
+	}
+
+	// get latest 10 top-level public statuses;
+	// ie., exclude replies and boosts, public only,
+	// with or without media
+	statuses, errWithCode := m.processor.AccountStatusesGet(ctx, authed, account.ID, 10, true, true, "", "", false, false, true)
+	if errWithCode != nil {
+		l.Debugf("error getting statuses from processor: %s", errWithCode.Error())
+		c.JSON(errWithCode.Code(), gin.H{"error": errWithCode.Safe()})
+		return
+	}
+
+	// pick a random dummy avatar if this account avatar isn't set yet
+	if account.Avatar == "" && len(m.defaultAvatars) > 0 {
+		//nolint:gosec
+		randomIndex := rand.Intn(len(m.defaultAvatars))
+		dummyAvatar := m.defaultAvatars[randomIndex]
+		account.Avatar = dummyAvatar
+		for _, s := range statuses {
+			s.Account.Avatar = dummyAvatar
+		}
+	}
+
+	c.HTML(http.StatusOK, "profile.tmpl", gin.H{
+		"instance": instance,
+		"account":  account,
+		"statuses": statuses,
+		"stylesheets": []string{
+			"/assets/Fork-Awesome/css/fork-awesome.min.css",
+			"/assets/status.css",
+			"/assets/profile.css",
+		},
+	})
+}
+
+func (m *Module) returnAPRepresentation(ctx context.Context, c *gin.Context, username string, accept string) {
+	verifier, signed := c.Get(string(ap.ContextRequestingPublicKeyVerifier))
+	if signed {
+		ctx = context.WithValue(ctx, ap.ContextRequestingPublicKeyVerifier, verifier)
+	}
+
+	signature, signed := c.Get(string(ap.ContextRequestingPublicKeySignature))
+	if signed {
+		ctx = context.WithValue(ctx, ap.ContextRequestingPublicKeySignature, signature)
+	}
+
+	user, errWithCode := m.processor.GetFediUser(ctx, username, c.Request.URL) // GetFediUser handles auth as well
+	if errWithCode != nil {
+		logrus.Infof(errWithCode.Error())
+		c.JSON(errWithCode.Code(), gin.H{"error": errWithCode.Safe()})
+		return
+	}
+
+	b, mErr := json.Marshal(user)
+	if mErr != nil {
+		err := fmt.Errorf("could not marshal json: %s", mErr)
+		c.JSON(http.StatusInternalServerError, gin.H{"error": err.Error()})
+		return
+	}
+
+	c.Data(http.StatusOK, accept, b)
+}