From 75f5eb14565f2a4eb50480d33091ffbb25612fc4 Mon Sep 17 00:00:00 2001
From: LittleSheep <littlesheep.code@hotmail.com>
Date: Tue, 3 Sep 2024 20:30:47 +0800
Subject: [PATCH] :sparkles: Whats new API

---
 pkg/internal/server/api/index.go         |  2 +
 pkg/internal/server/api/whats_new_api.go | 64 ++++++++++++++++++++++++
 2 files changed, 66 insertions(+)
 create mode 100644 pkg/internal/server/api/whats_new_api.go

diff --git a/pkg/internal/server/api/index.go b/pkg/internal/server/api/index.go
index 7b69c03..e0131ee 100644
--- a/pkg/internal/server/api/index.go
+++ b/pkg/internal/server/api/index.go
@@ -46,5 +46,7 @@ func MapAPIs(app *fiber.App, baseURL string) {
 			channels.Delete("/:channel/calls/ongoing/participant", kickParticipantInCall)
 			channels.Post("/:channel/calls/ongoing/token", exchangeCallToken)
 		}
+
+		api.Get("/whats-new", getWhatsNew)
 	}
 }
diff --git a/pkg/internal/server/api/whats_new_api.go b/pkg/internal/server/api/whats_new_api.go
new file mode 100644
index 0000000..5a77b52
--- /dev/null
+++ b/pkg/internal/server/api/whats_new_api.go
@@ -0,0 +1,64 @@
+package api
+
+import (
+	"fmt"
+	"git.solsynth.dev/hydrogen/messaging/pkg/internal/database"
+	"git.solsynth.dev/hydrogen/messaging/pkg/internal/gap"
+	"git.solsynth.dev/hydrogen/messaging/pkg/internal/models"
+	"github.com/gofiber/fiber/v2"
+)
+
+func getWhatsNew(c *fiber.Ctx) error {
+	if err := gap.H.EnsureAuthenticated(c); err != nil {
+		return err
+	}
+	user := c.Locals("user").(models.Account)
+
+	pivot := c.QueryInt("pivot", 0)
+	if pivot < 0 {
+		return fiber.NewError(fiber.StatusBadRequest, "pivot must be greater than zero")
+	}
+
+	take := c.QueryInt("take", 10)
+	if take > 100 {
+		take = 100
+	}
+
+	tx := database.C
+
+	var lookupRange []uint
+	var channelMembers []models.ChannelMember
+	if err := database.C.Where("account_id = ?", user.ID).Select("channel_id").Find(&channelMembers).Error; err != nil {
+		return fiber.NewError(fiber.StatusInternalServerError, fmt.Sprintf("unable to get channel identity of you: %v", err))
+	} else {
+		for _, member := range channelMembers {
+			lookupRange = append(lookupRange, member.ChannelID)
+		}
+	}
+
+	tx = tx.Where("channel_id IN ?", lookupRange)
+	tx = tx.Where("id > ?", pivot)
+
+	countTx := tx
+	var count int64
+	if err := countTx.Model(&models.Event{}).Count(&count).Error; err != nil {
+		return fiber.NewError(fiber.StatusInternalServerError, err.Error())
+	}
+
+	var items []models.Event
+	if err := database.C.
+		Where("channel_id IN ?", lookupRange).
+		Limit(take).
+		Order("created_at DESC").
+		Preload("Sender").
+		Preload("Sender.Account").
+		Find(&items).Error; err != nil {
+		return fiber.NewError(fiber.StatusBadRequest, err.Error())
+	}
+
+	return c.JSON(fiber.Map{
+		"count": count,
+		"data":  items,
+	})
+
+}