github-code-scanning[bot] commented on code in PR #7079:
URL: https://github.com/apache/trafficcontrol/pull/7079#discussion_r988365003


##########
traffic_ops/traffic_ops_golang/server/servers_server_capability.go:
##########
@@ -453,77 +454,167 @@
        }
        defer inf.Close()
 
-       var msc tc.MultipleServerCapabilities
-       if err := json.NewDecoder(r.Body).Decode(&msc); err != nil {
-               api.HandleErr(w, r, tx, http.StatusBadRequest, err, nil)
+       var mssc tc.MultipleServersCapabilities
+       if err := json.NewDecoder(r.Body).Decode(&mssc); err != nil {
+               api.HandleErr(w, r, tx, http.StatusBadRequest, 
fmt.Errorf("error decoding POST request body into MultipleServersCapabilities 
struct %w", err), nil)
                return
        }
 
-       // Check existence prior to checking type
-       _, exists, err := dbhelpers.GetServerNameFromID(tx, int64(msc.ServerID))
-       if err != nil {
-               api.HandleErr(w, r, tx, http.StatusInternalServerError, nil, 
err)
-       }
-       if !exists {
-               userErr := fmt.Errorf("server %d does not exist", msc.ServerID)
-               api.HandleErr(w, r, tx, http.StatusNotFound, userErr, nil)
-               return
+       if len(mssc.ServerIDs) == 1 {
+               errCode, userErr, sysErr = checkExistingServer(tx, 
mssc.ServerIDs[0], inf.User.UserName)
+               if userErr != nil || sysErr != nil {
+                       api.HandleErr(w, r, inf.Tx.Tx, errCode, userErr, sysErr)
+                       return
+               }
        }
 
-       // Ensure type is correct
-       correctType := true
-       if err := tx.QueryRow(scCheckServerTypeQuery(), 
msc.ServerID).Scan(&correctType); err != nil {
+       //Check if the server type is MID and/or EDGE
+       var servArray []int64
+       queryType := `SELECT array_agg(s.id) 
+               FROM server s
+               JOIN type t ON s.type = t.id
+               WHERE s.id = any ($1)
+               AND t.use_in_table = 'server'
+               AND (t.name LIKE 'MID%' OR t.name LIKE 'EDGE%')`
+       if err := tx.QueryRow(queryType, 
pq.Array(mssc.ServerIDs)).Scan(pq.Array(&servArray)); err != nil {
                api.HandleErr(w, r, tx, http.StatusInternalServerError, nil, 
fmt.Errorf("checking server type: %w", err))
                return
        }
-       if !correctType {
-               userErr := fmt.Errorf("server %d has an incorrect server type. 
Server capabilities can only be assigned to EDGE or MID servers", msc.ServerID)
-               api.HandleErr(w, r, tx, http.StatusBadRequest, userErr, nil)
-               return
+       cmp := make(map[int64]bool)
+       for _, item := range servArray {
+               cmp[item] = true
+       }
+       for _, sid := range mssc.ServerIDs {
+               if _, ok := cmp[sid]; !ok {
+                       userErr := fmt.Errorf("server id: %d has an incorrect 
server type. Server capability can only be assigned to EDGE or MID servers", 
sid)
+                       api.HandleErr(w, r, tx, http.StatusBadRequest, userErr, 
nil)
+                       return
+               }
+       }
+
+       // Insert rows in DB
+       sid := make([]int64, len(mssc.ServerCapabilities))
+       scs := make([]string, len(mssc.ServerIDs))
+       if len(mssc.ServerIDs) == 1 {
+               if len(mssc.ServerCapabilities) >= 1 {
+                       for i := range mssc.ServerCapabilities {
+                               sid[i] = mssc.ServerIDs[0]
+                       }
+                       scs = mssc.ServerCapabilities
+               }
+       } else if len(mssc.ServerCapabilities) == 1 {
+               if len(mssc.ServerIDs) >= 1 {
+                       for i := range mssc.ServerIDs {
+                               scs[i] = mssc.ServerCapabilities[0]
+                       }
+                       sid = mssc.ServerIDs
+               }
+       } else {
+               scs = mssc.ServerCapabilities
+               sid = mssc.ServerIDs
        }
 
-       cdnName, err := dbhelpers.GetCDNNameFromServerID(tx, 
int64(msc.ServerID))
+       msscQuery := `INSERT INTO server_server_capability
+                       select "server_capability", "server"
+                       FROM UNNEST($1::text[], $2::int[]) AS 
tmp("server_capability", "server")`
+       _, err := tx.Query(msscQuery, pq.Array(scs), pq.Array(sid))
        if err != nil {
-               api.HandleErr(w, r, tx, http.StatusInternalServerError, nil, 
err)
+               useErr, sysErr, statusCode := api.ParseDBError(err)
+               api.HandleErr(w, r, tx, statusCode, useErr, sysErr)
                return
        }
 
-       userErr, sysErr, errCode = dbhelpers.CheckIfCurrentUserCanModifyCDN(tx, 
string(cdnName), inf.User.UserName)
+       var alerts tc.Alerts
+       if len(mssc.ServerCapabilities) == 1 && len(mssc.ServerIDs) == 1 {
+               alerts = tc.CreateAlerts(tc.SuccessLevel, "Assigned either a 
Server Capability to a server or a Server to a capability")
+       } else if len(mssc.ServerCapabilities) > 1 && len(mssc.ServerIDs) == 1 {
+               alerts = tc.CreateAlerts(tc.SuccessLevel, "Multiple Server 
Capabilities assigned to a server")
+       } else if len(mssc.ServerCapabilities) == 1 && len(mssc.ServerIDs) > 1 {
+               alerts = tc.CreateAlerts(tc.SuccessLevel, "Multiple Servers 
assigned to a capability")
+       } else {
+               alerts = tc.CreateAlerts(tc.SuccessLevel, "Multiple Servers 
assigned to multiple capabilities")
+       }
+       api.WriteAlertsObj(w, r, http.StatusOK, alerts, mssc)
+       return
+}
+
+// DeleteMultipleServersCapabilities deletes multiple servers to a capability 
or multiple server capabilities to a server
+func DeleteMultipleServersCapabilities(w http.ResponseWriter, r *http.Request) 
{
+       inf, userErr, sysErr, errCode := api.NewInfo(r, nil, nil)
+       tx := inf.Tx.Tx
        if userErr != nil || sysErr != nil {
-               api.HandleErr(w, r, tx, errCode, userErr, sysErr)
+               api.HandleErr(w, r, inf.Tx.Tx, errCode, userErr, sysErr)
                return
        }
+       defer inf.Close()
 
-       //Delete existing rows from server_server_capability for a given server
-       _, err = tx.Exec("DELETE FROM server_server_capability ssc WHERE 
ssc.server=$1", msc.ServerID)
-       if err != nil {
-               useErr, sysErr, statusCode := api.ParseDBError(err)
-               api.HandleErr(w, r, tx, statusCode, useErr, sysErr)
+       var mssc tc.MultipleServersCapabilities
+       if err := json.NewDecoder(r.Body).Decode(&mssc); err != nil {
+               api.HandleErr(w, r, tx, http.StatusBadRequest, 
fmt.Errorf("error decoding DELETE request body into MultipleServersCapabilities 
struct %w", err), nil)
                return
        }
 
-       multipleServerCapabilities := make([]string, 0, 
len(msc.ServerCapabilities))
+       if len(mssc.ServerIDs) == 1 {
+               errCode, userErr, sysErr = checkExistingServer(tx, 
mssc.ServerIDs[0], inf.User.UserName)
+               if userErr != nil || sysErr != nil {
+                       api.HandleErr(w, r, inf.Tx.Tx, errCode, userErr, sysErr)
+                       return
+               }
+       }
 
-       mscQuery := `WITH inserted AS (
-               INSERT INTO server_server_capability
-               SELECT "server_capability", $2
-               FROM UNNEST($1::text[]) AS tmp("server_capability")
-               RETURNING server_capability
-               )
-               SELECT ARRAY_AGG(server_capability)
-               FROM (
-                       SELECT server_capability
-                       FROM inserted
-               ) AS returned(server_capability)`
+       //Delete existing rows from server_server_capability for a given server 
or for a given capability
+       var where string
+       if len(mssc.ServerCapabilities) == 1 && len(mssc.ServerIDs) == 1 {
+               where = fmt.Sprintf("WHERE ssc.server_capability='%s' AND 
ssc.server=%v", mssc.ServerCapabilities[0], mssc.ServerIDs[0])
+       } else if len(mssc.ServerCapabilities) == 1 {
+               where = fmt.Sprintf("WHERE ssc.server_capability='%s'", 
mssc.ServerCapabilities[0])
+       } else if len(mssc.ServerIDs) == 1 {
+               where = fmt.Sprintf("WHERE ssc.server=%v", mssc.ServerIDs[0])
+       }
 
-       err = tx.QueryRow(mscQuery, pq.Array(msc.ServerCapabilities), 
msc.ServerID).Scan(pq.Array(&multipleServerCapabilities))
+       delString := "DELETE FROM server_server_capability ssc " + where
+       result, err := tx.Exec(delString)

Review Comment:
   ## Database query built from user-controlled sources
   
   This query depends on a [user-provided value](1).
   
   [Show more 
details](https://github.com/apache/trafficcontrol/security/code-scanning/234)



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