[MM-42739] Insights - Top Channels API Endpoint (#19953)

* [MM-42739] Initial setup for top channels for team

* [MM-42739] Add initial tests

* [MM-42739] Update tests

* [MM-42739] Add top channels for user

* [MM-42739] Fix query

* [MM-42739] Update query

* [MM-42739] Improve query performance

* [MM-42739] Remove rank

* [MM-42739] Fix tests to use new time range today

* [MM-42739] Add tests for top channels for user

* [MM-42739] Add test for pagination

* Remove top channels by time struct

* [MM-42739] Update test names

* [MM-42739] Remove rank from top reactions

* [MM-42739] Return empty array instead of nil when result is empty

* [MM-42739] Add additional tests and update permissions check for teams

* [MM-42739] Add excluded channel tests for top reactions

* [MM-42739] Move insights to api4/insights and keep time range as string until required

* [MM-42739] Update queries only check DeleteAt after union

* [MM-42739] Improve query performance by using publicchannels table

* [MM-42739] Fix broken query after merge

web/context.go

@@ -374,17 +374,6 @@ func (c *Context) RequireTimestamp() *Context {
 	return c
 }
 
-func (c *Context) RequireTimeRange() *Context {
-	if c.Err != nil {
-		return c
-	}
-
-	if c.Params.TimeRange == 0 {
-		c.SetInvalidURLParam("time_range")
-	}
-	return c
-}
-
 func (c *Context) RequireChannelId() *Context {
 	if c.Err != nil {
 		return c

web/params.go

@@ -31,7 +31,7 @@ type Params struct {
 	TokenId                   string
 	ThreadId                  string
 	Timestamp                 int64
-	TimeRange                 int64
+	TimeRange                 string
 	ChannelId                 string
 	PostId                    string
 	PolicyId                  string
@@ -255,11 +255,7 @@ func ParamsFromRequest(r *http.Request) *Params {
 		params.Timestamp = val
 	}
 
-	if val, err := model.GetStartUnixMilliForTimeRange(query.Get("time_range")); err != nil {
-		params.TimeRange = 0
-	} else {
-		params.TimeRange = val
-	}
+	params.TimeRange = query.Get("time_range")
 
 	if val, err := strconv.ParseBool(query.Get("permanent")); err == nil {
 		params.Permanent = val