add getUserChannelProfile API and update

Subscription model name

src/controllers/user.controller.js

@@ -256,7 +256,7 @@ const getCurrentUser = asyncHandler(async(req, res) => {
     .status(200)
     .json(new ApiResponse(
         200,
-        user,
+        req.user,
         "User fetched successfully"
     ))
 })
@@ -353,6 +353,78 @@ const updateUserCoverImage = asyncHandler(async(req, res) => {
 })
 
 
+const getUserChannelProfile = asyncHandler(async(req, res) => {
+    const {username} = req.params
+
+    if (!username?.trim()) {
+        throw new ApiError(400, "username is missing")
+    }
+
+    const channel = await User.aggregate([
+        {
+            $match: {
+                username: username?.toLowerCase()
+            }
+        },
+        {
+            $lookup: {
+                from: "subscriptions",
+                localField: "_id",
+                foreignField: "channel",
+                as: "subscribers"
+            }
+        },
+        {
+            $lookup: {
+                from: "subscriptions",
+                localField: "_id",
+                foreignField: "subscriber",
+                as: "subscribedTo"
+            }
+        },
+        {
+            $addFields: {
+                subscribersCount: {
+                    $size: "$subscribers"
+                },
+                channelsSubscribedToCount: {
+                    $size: "$subscribedTo"
+                },
+                isSubscribed: {
+                    $cond: {
+                        if: {$in: [req.user?._id, "$subscribers.subscriber"]},
+                        then: true,
+                        else: false
+                    }
+                }
+            }
+        },
+        {
+            $project: {
+                fullName: 1,
+                username: 1,
+                subscribersCount: 1,
+                channelsSubscribedToCount: 1,
+                isSubscribed: 1,
+                avatar: 1,
+                coverImage: 1,
+                email: 1
+
+            }
+        }
+    ])
+
+    if (!channel?.length) {
+        throw new ApiError(404, "channel does not exists")
+    }
+
+    return res
+    .status(200)
+    .json(
+        new ApiResponse(200, channel[0], "User channel fetched successfully")
+    )
+})
+
 
 export {
     registerUser,
@@ -363,5 +435,7 @@ export {
     getCurrentUser,
     updateAccountDetails,
     updateUserAvatar,
-    updateUserCoverImage
+    updateUserCoverImage,
+    getUserChannelProfile
+
 }

src/models/subscription.model.js

@@ -13,4 +13,4 @@ const subscriptionSchema = new Schema({
 
 
 
-export const Subsciption = mongoose.model("Subsciption", subscriptionSchema)
+export const Subsciption = mongoose.model("Subscription", subscriptionSchema)