users: huge cleanup/dedupe, interface-based third-party services

shared "newUser" method is now "NewUserPostVerification", and is shared
between all routes which create a jellyfin account. The new
"NewUserFromInvite", "NewUserFromAdmin" and "NewUserFromConfirmationKey"
are smaller as a result. Discord, Telegram, and Matrix now implement the
"ContactMethodLinker" and "ContactMethodUser" interfaces, meaning code
is shared a lot between them in the NewUser methods, and the specifics
are now in their own files. Ombi/Jellyseerr similarly implement a
simpler interface "ThirdPartyService", which simply has ImportUser and
AddContactMethod routes. Note these new interface methods are only used
for user creation as of yet, but could likely be used in other places.

api-jellyseerr.go

@@ -1,10 +1,12 @@
 package main
 
 import (
+	"fmt"
 	"net/url"
 	"strconv"
 
 	"github.com/gin-gonic/gin"
+	"github.com/hrfee/jfa-go/jellyseerr"
 	lm "github.com/hrfee/jfa-go/logmessages"
 )
 
@@ -97,3 +99,67 @@ func (app *appContext) DeleteJellyseerrProfile(gc *gin.Context) {
 	app.storage.SetProfileKey(profileName, profile)
 	respondBool(204, true, gc)
 }
+
+type JellyseerrWrapper struct {
+	*jellyseerr.Jellyseerr
+}
+
+func (js *JellyseerrWrapper) ImportUser(jellyfinID string, req newUserDTO, profile Profile) (err error, ok bool) {
+	// Gets existing user (not possible) or imports the given user.
+	_, err = js.MustGetUser(jellyfinID)
+	if err != nil {
+		return
+	}
+	ok = true
+	err = js.ApplyTemplateToUser(jellyfinID, profile.Jellyseerr.User)
+	if err != nil {
+		err = fmt.Errorf(lm.FailedApplyTemplate, "user", lm.Jellyseerr, jellyfinID, err)
+		return
+	}
+	err = js.ApplyNotificationsTemplateToUser(jellyfinID, profile.Jellyseerr.Notifications)
+	if err != nil {
+		err = fmt.Errorf(lm.FailedApplyTemplate, "notifications", lm.Jellyseerr, jellyfinID, err)
+		return
+	}
+	return
+}
+
+func (js *JellyseerrWrapper) AddContactMethods(jellyfinID string, req newUserDTO, discord *DiscordUser, telegram *TelegramUser) (err error) {
+	_, err = js.MustGetUser(jellyfinID)
+	if err != nil {
+		return
+	}
+	contactMethods := map[jellyseerr.NotificationsField]any{}
+	if emailEnabled {
+		err = js.ModifyMainUserSettings(jellyfinID, jellyseerr.MainUserSettings{Email: req.Email})
+		if err != nil {
+			// FIXME: This is a little ugly, considering all other errors are unformatted
+			err = fmt.Errorf(lm.FailedSetEmailAddress, lm.Jellyseerr, jellyfinID, err)
+			return
+		} else {
+			contactMethods[jellyseerr.FieldEmailEnabled] = req.EmailContact
+		}
+	}
+	if discordEnabled && discord != nil {
+		contactMethods[jellyseerr.FieldDiscord] = discord.ID
+		contactMethods[jellyseerr.FieldDiscordEnabled] = req.DiscordContact
+	}
+	if telegramEnabled && discord != nil {
+		contactMethods[jellyseerr.FieldTelegram] = telegram.ChatID
+		contactMethods[jellyseerr.FieldTelegramEnabled] = req.TelegramContact
+	}
+	if len(contactMethods) > 0 {
+		err = js.ModifyNotifications(jellyfinID, contactMethods)
+		if err != nil {
+			// app.err.Printf(lm.FailedSyncContactMethods, lm.Jellyseerr, err)
+			return
+		}
+	}
+	return
+}
+
+func (js *JellyseerrWrapper) Name() string { return lm.Jellyseerr }
+
+func (js *JellyseerrWrapper) Enabled(app *appContext, profile *Profile) bool {
+	return profile != nil && profile.Jellyseerr.Enabled && app.config.Section("jellyseerr").Key("enabled").MustBool(false)
+}