Implement getElectionResults

internal/models/votes.go

@@ -3,17 +3,27 @@ package models
 import (
 	"database/sql"
 	"errors"
+	"time"
 )
 
 type VoteModelInterface interface {
 	Insert(voterIdentity string, electionId int, choiceText string, tokens int) (int, error)
 	Exists(voterIdentity string, electionID int) (bool, error)
+	GetByElection(electionID int) (*[]Vote, error)
 }
 
 type VoteModel struct {
 	DB *sql.DB
 }
 
+type Vote struct {
+	VoterIdentity string
+	ElectionID    int
+	ChoiceText    string
+	Tokens        int
+	CreatedAt     time.Time
+}
+
 func (v *VoteModel) Insert(voterIdentity string, electionId int, choiceText string, tokens int) (int, error) {
 	tx, err := v.DB.Begin()
 	if err != nil {
@@ -55,3 +65,43 @@ func (v *VoteModel) Exists(voterIdentity string, electionID int) (bool, error) {
 	}
 	return exists, nil
 }
+
+func (v *VoteModel) GetByElection(electionID int) (*[]Vote, error) {
+	query := `
+		SELECT voter_identity, election_id, choice_text, tokens, created_at
+		FROM votes
+		WHERE election_id = ?
+	`
+
+	rows, err := v.DB.Query(query, electionID)
+	if err != nil {
+		return nil, err
+	}
+	defer rows.Close()
+
+	var votes []Vote
+	for rows.Next() {
+		var vote Vote
+		err := rows.Scan(
+			&vote.VoterIdentity,
+			&vote.ElectionID,
+			&vote.ChoiceText,
+			&vote.Tokens,
+			&vote.CreatedAt,
+		)
+		if err != nil {
+			return nil, err
+		}
+		votes = append(votes, vote)
+	}
+
+	if err = rows.Err(); err != nil {
+		return nil, err
+	}
+
+	if len(votes) == 0 {
+		return nil, sql.ErrNoRows
+	}
+
+	return &votes, nil
+}