api/usage: init

2 files changed, 55 insertions, 3 deletions

diff --git a/api/main.go b/api/main.go
index 7081d3c..32f7d08 100644
--- a/api/main.go
+++ b/api/main.go
@@ -1,10 +1,12 @@
 package api
 
 import (
+	"context"
 	"encoding/json"
 	"log"
 	"net"
 
+	"sinanmohd.com/redq/db"
 	"sinanmohd.com/redq/usage"
 )
 
@@ -40,7 +42,7 @@ func New() (*Api, error) {
 	return &a, nil
 }
 
-func (a *Api) Run(u *usage.Usage) {
+func (a *Api) Run(u *usage.Usage, queries *db.Queries, ctxDb context.Context) {
 	for {
 		conn, err := a.sock.Accept()
 		if err != nil {
@@ -48,11 +50,11 @@ func (a *Api) Run(u *usage.Usage) {
 			continue
 		}
 
-		go handleConn(conn, u)
+		go handleConn(conn, u, queries, ctxDb)
 	}
 }
 
-func handleConn(conn net.Conn, u *usage.Usage) {
+func handleConn(conn net.Conn, u *usage.Usage, queries *db.Queries, ctxDb context.Context) {
 	defer conn.Close()
 	var req ApiReq
 	buf := make([]byte, bufSize)
@@ -72,6 +74,8 @@ func handleConn(conn net.Conn, u *usage.Usage) {
 	switch req.Type {
 	case "bandwidth":
 		handleBandwidth(conn, u)
+	case "usage":
+		handleUsage(conn, u, queries, ctxDb)
 	default:
 		log.Printf("invalid request type: %s", req.Type)
 	}
diff --git a/api/usage.go b/api/usage.go
new file mode 100644
index 0000000..5849ba7
--- /dev/null
+++ b/api/usage.go
@@ -0,0 +1,48 @@
+package api
+
+import (
+	"context"
+	"encoding/json"
+	"log"
+	"net"
+
+	"github.com/dustin/go-humanize"
+	"sinanmohd.com/redq/db"
+	"sinanmohd.com/redq/usage"
+)
+
+type UsageStat struct {
+	Ingress string `json:"ingress"`
+	Egress  string `json:"egress"`
+}
+
+type UsageResp map[string]UsageStat
+
+func handleUsage(conn net.Conn, u *usage.Usage, queries *db.Queries, ctxDb context.Context) {
+	resp := make(UsageResp)
+
+	fetchedUsage, err := queries.GetUsage(ctxDb)
+	if err != nil {
+		log.Printf("fetching from database: %s", err)
+		return
+	}
+
+	u.Mutex.RLock()
+	for _, value := range u.Data {
+		fetchedUsage.Ingress += int64(value.Ingress)
+		fetchedUsage.Egress += int64(value.Egress)
+	}
+	u.Mutex.RUnlock()
+	resp["total"] = UsageStat{
+		Ingress: humanize.Bytes(uint64(fetchedUsage.Ingress)),
+		Egress:  humanize.Bytes(uint64(fetchedUsage.Egress)),
+	}
+
+	buf, err := json.Marshal(resp)
+	if err != nil {
+		log.Printf("marshaling json: %s", err)
+		return
+	}
+
+	conn.Write(buf)
+}