update last_updated when calling the API with a token

app/start.go

@@ -74,6 +74,9 @@ func Start(conf common.Conf, dbO *sqlx.DB) *gin.Engine {
 		DB:       conf.RedisDB,
 	})
 
+	// token updater
+	go tokenUpdater(db)
+
 	api := r.Group("/api")
 	{
 		p := api.Group("/")

app/tokens.go

@@ -4,20 +4,20 @@ import (
 	"crypto/md5"
 	"database/sql"
 	"fmt"
-
+	"time"
-	"github.com/jmoiron/sqlx"
 
 	"git.zxq.co/ripple/rippleapi/common"
+	"github.com/jmoiron/sqlx"
 )
 
 // GetTokenFull retrieves an user ID and their token privileges knowing their API token.
 func GetTokenFull(token string, db *sqlx.DB) (common.Token, bool) {
-	var t common.Token
 	var (
+		t             common.Token
 		tokenPrivsRaw uint64
 		userPrivsRaw  uint64
+		priv8         bool
 	)
-	var priv8 bool
 	err := db.QueryRow(`SELECT 
 	t.id, t.user, t.privileges, t.private, u.privileges
 FROM tokens t
@@ -27,6 +27,7 @@ WHERE token = ? LIMIT 1`,
 		Scan(
 			&t.ID, &t.UserID, &tokenPrivsRaw, &priv8, &userPrivsRaw,
 		)
+	updateTokens <- t.ID
 	if priv8 {
 		tokenPrivsRaw = common.PrivilegeReadConfidential | common.PrivilegeWrite
 	}
@@ -42,3 +43,43 @@ WHERE token = ? LIMIT 1`,
 		return t, true
 	}
 }
+
+var updateTokens = make(chan int, 100)
+
+func tokenUpdater(db *sqlx.DB) {
+	for {
+		// prepare a queue of tokens to update.
+		tokensToUpdate := make([]int, 0, 50)
+	AwaitLoop:
+		for {
+			// if we got ten, move on and update
+			if len(tokensToUpdate) >= 50 {
+				break
+			}
+			// if we ain't got any, add what we get straight from updateTokens
+			if len(tokensToUpdate) == 0 {
+				x := <-updateTokens
+				tokensToUpdate = append(tokensToUpdate, x)
+				continue
+			}
+
+			// otherwise, wait from updateTokens with a timeout of 10 seconds
+			select {
+			case x := <-updateTokens:
+				tokensToUpdate = append(tokensToUpdate, x)
+			case <-time.After(10 * time.Second):
+				// wondering what this means?
+				// https://golang.org/ref/spec#Break_statements
+				break AwaitLoop
+			}
+		}
+
+		q, a, _ := sqlx.In("UPDATE tokens SET last_updated = ? WHERE id IN (?)", time.Now().Unix(), tokensToUpdate)
+
+		q = db.Rebind(q)
+		_, err := db.Exec(q, a...)
+		if err != nil {
+			fmt.Println(err)
+		}
+	}
+}

app/v1/token.go

@@ -4,6 +4,7 @@ import (
 	"crypto/md5"
 	"database/sql"
 	"fmt"
+	"time"
 
 	"github.com/jmoiron/sqlx"
 
@@ -121,7 +122,8 @@ func TokenNewPOST(md common.MethodData) common.CodeMessager {
 			return Err500
 		}
 	}
-	_, err = md.DB.Exec("INSERT INTO tokens(user, privileges, description, token, private) VALUES (?, ?, ?, ?, '0')", r.ID, r.Privileges, data.Description, tokenMD5)
+	_, err = md.DB.Exec("INSERT INTO tokens(user, privileges, description, token, private, last_updated) VALUES (?, ?, ?, ?, '0', ?)",
+		r.ID, r.Privileges, data.Description, tokenMD5, time.Now().Unix())
 	if err != nil {
 		md.Err(err)
 		return Err500
@@ -149,6 +151,7 @@ type token struct {
 	ID          int                  `json:"id"`
 	Privileges  uint64               `json:"privileges"`
 	Description string               `json:"description"`
+	LastUpdated common.UnixTimestamp `json:"last_updated"`
 }
 type tokenResponse struct {
 	common.ResponseBase
@@ -157,14 +160,14 @@ type tokenResponse struct {
 
 // TokenGET retrieves a list listing all the user's public tokens.
 func TokenGET(md common.MethodData) common.CodeMessager {
-	rows, err := md.DB.Query("SELECT id, privileges, description FROM tokens WHERE user = ? AND private = '0'", md.ID())
+	rows, err := md.DB.Query("SELECT id, privileges, description, last_updated FROM tokens WHERE user = ? AND private = '0'", md.ID())
 	if err != nil {
 		return Err500
 	}
 	var r tokenResponse
 	for rows.Next() {
 		var t token
-		err = rows.Scan(&t.ID, &t.Privileges, &t.Description)
+		err = rows.Scan(&t.ID, &t.Privileges, &t.Description, &t.LastUpdated)
 		if err != nil {
 			md.Err(err)
 			continue
@@ -187,9 +190,9 @@ func TokenSelfGET(md common.MethodData) common.CodeMessager {
 	}
 	var r tokenSingleResponse
 	// md.User.ID = token id, userid would have been md.User.UserID. what a clusterfuck
-	err := md.DB.QueryRow("SELECT id, privileges, description FROM tokens WHERE id = ? "+
+	err := md.DB.QueryRow("SELECT id, privileges, description, last_updated FROM tokens WHERE id = ? "+
 		common.Paginate(md.Query("p"), md.Query("l"), 50), md.User.ID).Scan(
-		&r.ID, &r.Privileges, &r.Description,
+		&r.ID, &r.Privileges, &r.Description, &r.LastUpdated,
 	)
 	if err != nil {
 		md.Err(err)