one off hack to cache query results between requests... need generalization

database.go

@@ -24,6 +24,7 @@ import (
 	"sort"
 	"strconv"
 	"strings"
+	"sync"
 	"time"
 
 	"humungus.tedunangst.com/r/webs/cache"
@@ -215,11 +216,38 @@ func gethonksforuserfirstclass(userid int64, wanted int64) []*Honk {
 	rows, err := stmtHonksForUserFirstClass.Query(wanted, userid, dt, userid, userid)
 	return getsomehonks(rows, err)
 }
+
+var mehonks = make(map[int64][]*Honk)
+var melock sync.Mutex
+
 func gethonksforme(userid int64, wanted int64) []*Honk {
+	if wanted > 0 {
 		dt := time.Now().UTC().Add(-7 * 24 * time.Hour).Format(dbtimeformat)
 		rows, err := stmtHonksForMe.Query(wanted, userid, dt, userid)
 		return getsomehonks(rows, err)
 	}
+
+	melock.Lock()
+	defer melock.Unlock()
+	honks := mehonks[userid]
+	if len(honks) == 0 {
+		dt := time.Now().UTC().Add(-7 * 24 * time.Hour).Format(dbtimeformat)
+		rows, err := stmtHonksForMe.Query(wanted, userid, dt, userid)
+		honks = getsomehonks(rows, err)
+		mehonks[userid] = honks
+		return honks
+	}
+	wanted = honks[0].ID
+	dt := time.Now().UTC().Add(-7 * 24 * time.Hour).Format(dbtimeformat)
+	rows, err := stmtHonksForMe.Query(wanted, userid, dt, userid)
+	honks = getsomehonks(rows, err)
+	honks = append(honks, mehonks[userid]...)
+	if len(honks) > 250 {
+		honks = honks[:250]
+	}
+	mehonks[userid] = honks
+	return honks
+}
 func getsavedhonks(userid int64, wanted int64) []*Honk {
 	rows, err := stmtHonksISaved.Query(wanted, userid)
 	return getsomehonks(rows, err)