Add Resultsf() to *Poll.

Optimise PollResults() with a byte buffer.

common/poll.go

@@ -28,30 +28,49 @@ func (p *Poll) CastVote(optionIndex, uid int, ip string) error {
 	if Config.DisablePollIP || !p.AntiCheat {
 		ip = ""
 	}
-	_, err := pollStmts.addVote.Exec(p.ID, uid, optionIndex, ip)
-	if err != nil {
-		return err
+	_, e := pollStmts.addVote.Exec(p.ID, uid, optionIndex, ip)
+	if e != nil {
+		return e
 	}
-	_, err = pollStmts.incVoteCount.Exec(p.ID)
-	if err != nil {
-		return err
+	_, e = pollStmts.incVoteCount.Exec(p.ID)
+	if e != nil {
+		return e
 	}
-	_, err = pollStmts.incVoteCountForOption.Exec(optionIndex, p.ID)
-	return err
+	_, e = pollStmts.incVoteCountForOption.Exec(optionIndex, p.ID)
+	return e
 }
 
 func (p *Poll) Delete() error {
-	_, err := pollStmts.deletePollVotes.Exec(p.ID)
-	if err != nil {
-		return err
+	_, e := pollStmts.deletePollVotes.Exec(p.ID)
+	if e != nil {
+		return e
 	}
-	_, err = pollStmts.deletePollOptions.Exec(p.ID)
-	if err != nil {
-		return err
+	_, e = pollStmts.deletePollOptions.Exec(p.ID)
+	if e != nil {
+		return e
 	}
-	_, err = pollStmts.deletePoll.Exec(p.ID)
+	_, e = pollStmts.deletePoll.Exec(p.ID)
 	_ = Polls.GetCache().Remove(p.ID)
-	return err
+	return e
+}
+
+func (p *Poll) Resultsf(f func(votes int) error) error {
+	rows, e := pollStmts.getResults.Query(p.ID)
+	if e != nil {
+		return e
+	}
+	defer rows.Close()
+
+	var votes int
+	for rows.Next() {
+		if e := rows.Scan(&votes); e != nil {
+			return e
+		}
+		if e := f(votes); e != nil {
+			return e
+		}
+	}
+	return rows.Err()
 }
 
 func (p *Poll) Copy() Poll {
@@ -59,9 +78,12 @@ func (p *Poll) Copy() Poll {
 }
 
 type PollStmts struct {
+	getResults *sql.Stmt
+
 	addVote               *sql.Stmt
 	incVoteCount          *sql.Stmt
 	incVoteCountForOption *sql.Stmt
+
 	deletePoll        *sql.Stmt
 	deletePollOptions *sql.Stmt
 	deletePollVotes   *sql.Stmt
@@ -70,13 +92,17 @@ type PollStmts struct {
 func init() {
 	DbInits.Add(func(acc *qgen.Accumulator) error {
 		p := "polls"
+		wh := "pollID=?"
 		pollStmts = PollStmts{
+			getResults: acc.Select("polls_options").Columns("votes").Where("pollID=?").Orderby("option ASC").Prepare(),
+
 			addVote:               acc.Insert("polls_votes").Columns("pollID,uid,option,castAt,ip").Fields("?,?,?,UTC_TIMESTAMP(),?").Prepare(),
-			incVoteCount:          acc.Update(p).Set("votes = votes + 1").Where("pollID=?").Prepare(),
-			incVoteCountForOption: acc.Update("polls_options").Set("votes = votes + 1").Where("option=? AND pollID=?").Prepare(),
-			deletePoll:            acc.Delete(p).Where("pollID=?").Prepare(),
-			deletePollOptions:     acc.Delete("polls_options").Where("pollID=?").Prepare(),
-			deletePollVotes:       acc.Delete("polls_votes").Where("pollID=?").Prepare(),
+			incVoteCount:          acc.Update(p).Set("votes=votes+1").Where(wh).Prepare(),
+			incVoteCountForOption: acc.Update("polls_options").Set("votes=votes+1").Where("option=? AND pollID=?").Prepare(),
+
+			deletePoll:        acc.Delete(p).Where(wh).Prepare(),
+			deletePollOptions: acc.Delete("polls_options").Where(wh).Prepare(),
+			deletePollVotes:   acc.Delete("polls_votes").Where(wh).Prepare(),
 		}
 		return acc.FirstError()
 	})

misc_test.go

@@ -1546,6 +1546,32 @@ func TestPolls(t *testing.T) {
 	expectNilErr(t, e)
 	testPoll(p, 1, tid, "topics", 0, false, 1)
 
+	var vslice []int
+	expectNilErr(t, p.Resultsf(func(votes int) error {
+		vslice = append(vslice, votes)
+		return nil
+	}))
+	//fmt.Printf("vslice: %+v\n", vslice)
+	exf(vslice[0] == 1, "vslice[0] should be %d not %d", 0, vslice[0])
+	exf(vslice[1] == 0, "vslice[1] should be %d not %d", 1, vslice[1])
+	exf(vslice[2] == 0, "vslice[2] should be %d not %d", 0, vslice[2])
+
+	expectNilErr(t, p.CastVote(2, 1, ""))
+	expectNilErr(t, c.Polls.Reload(p.ID))
+	p, e = c.Polls.Get(1)
+	expectNilErr(t, e)
+	testPoll(p, 1, tid, "topics", 0, false, 2)
+
+	vslice = nil
+	expectNilErr(t, p.Resultsf(func(votes int) error {
+		vslice = append(vslice, votes)
+		return nil
+	}))
+	//fmt.Printf("vslice: %+v\n", vslice)
+	exf(vslice[0] == 1, "vslice[0] should be %d not %d", 1, vslice[0])
+	exf(vslice[1] == 0, "vslice[1] should be %d not %d", 0, vslice[1])
+	exf(vslice[2] == 1, "vslice[2] should be %d not %d", 1, vslice[2])
+
 	expectNilErr(t, c.Polls.ClearIPs())
 	// TODO: Test to see if it worked
 

routes/poll.go

@@ -1,13 +1,13 @@
 package routes
 
 import (
+	"bytes"
 	"database/sql"
 	"errors"
 	"net/http"
 	"strconv"
 
 	c "github.com/Azareal/Gosora/common"
-	qgen "github.com/Azareal/Gosora/query_gen"
 )
 
 func PollVote(w http.ResponseWriter, r *http.Request, u *c.User, sPollID string) c.RouteError {
@@ -78,29 +78,23 @@ func PollResults(w http.ResponseWriter, r *http.Request, u *c.User, sPollID stri
 		return c.InternalError(err, w, r)
 	}
 
-	// TODO: Abstract this
-	rows, err := qgen.NewAcc().Select("polls_options").Columns("votes").Where("pollID=?").Orderby("option ASC").Query(poll.ID)
-	if err != nil {
-		return c.InternalError(err, w, r)
+	// TODO: Implement a version of this which doesn't rely so much on sequential order
+	var ob bytes.Buffer
+	ob.WriteRune('[')
+	var i int
+	e := poll.Resultsf(func(votes int) error {
+		if i != 0 {
+			ob.WriteRune(',')
 		}
-	defer rows.Close()
-
-	optList := ""
-	var votes int
-	for rows.Next() {
-		if e := rows.Scan(&votes); e != nil {
+		ob.WriteString(strconv.Itoa(votes))
+		i++
+		return nil
+	})
+	if e != nil && e != sql.ErrNoRows {
 		return c.InternalError(e, w, r)
 	}
-		optList += strconv.Itoa(votes) + ","
-	}
-	if err = rows.Err(); err != nil {
-		return c.InternalError(err, w, r)
-	}
+	ob.WriteRune(']')
+	w.Write(ob.Bytes())
 
-	// TODO: Implement a version of this which doesn't rely so much on sequential order
-	if len(optList) > 0 {
-		optList = optList[:len(optList)-1]
-	}
-	w.Write([]byte("[" + optList + "]"))
 	return nil
 }