84 lines
1.9 KiB
Go
84 lines
1.9 KiB
Go
package main
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import (
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"net/http"
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"time"
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)
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func commentVote(commenterHex string, commentHex string, direction int) error {
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if commentHex == "" || commenterHex == "" {
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return errorMissingField
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}
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statement := `
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SELECT commenterHex
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FROM comments
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WHERE commentHex = $1;
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`
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row := db.QueryRow(statement, commentHex)
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var authorHex string
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if err := row.Scan(&authorHex); err != nil {
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logger.Errorf("erorr selecting authorHex for vote")
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return errorInternal
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}
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if authorHex == commenterHex {
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return errorSelfVote
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}
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statement = `
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INSERT INTO
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votes (commentHex, commenterHex, direction, voteDate)
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VALUES ($1, $2, $3, $4 )
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ON CONFLICT (commentHex, commenterHex) DO
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UPDATE SET direction = $3;
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`
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_, err := db.Exec(statement, commentHex, commenterHex, direction, time.Now().UTC())
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if err != nil {
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logger.Errorf("error inserting/updating votes: %v", err)
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return errorInternal
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}
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return nil
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}
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func commentVoteHandler(w http.ResponseWriter, r *http.Request) {
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type request struct {
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Session *string `json:"session"`
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CommentHex *string `json:"commentHex"`
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Direction *int `json:"direction"`
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}
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var x request
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if err := unmarshalBody(r, &x); err != nil {
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writeBody(w, response{"success": false, "message": err.Error()})
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return
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}
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if *x.Session == "anonymous" {
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writeBody(w, response{"success": false, "message": errorUnauthorisedVote.Error()})
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return
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}
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c, err := commenterGetBySession(*x.Session)
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if err != nil {
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writeBody(w, response{"success": false, "message": err.Error()})
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return
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}
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direction := 0
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if *x.Direction > 0 {
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direction = 1
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} else if *x.Direction < 0 {
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direction = -1
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}
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if err := commentVote(c.CommenterHex, *x.CommentHex, direction); err != nil {
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writeBody(w, response{"success": false, "message": err.Error()})
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return
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}
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writeBody(w, response{"success": true})
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}
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