Selectively query DB based on GraphQL query field collection

Fixes #5

pkg/db/sqlite/dto.go

@@ -1,11 +1,82 @@
 package sqlite
 
-import "time"
+import (
+	"database/sql"
+	"errors"
+	"fmt"
+	"net/http"
+	"net/url"
+	"strconv"
+	"time"
+
+	"github.com/dstotijn/hetty/pkg/reqlog"
+)
+
+type reqURL url.URL
+
+type httpRequest struct {
+	ID        int64     `db:"req_id"`
+	Proto     string    `db:"req_proto"`
+	URL       reqURL    `db:"url"`
+	Method    string    `db:"method"`
+	Body      []byte    `db:"req_body"`
+	Timestamp time.Time `db:"req_timestamp"`
+	httpResponse
+}
 
 type httpResponse struct {
-	ID         *int64
-	Proto      *string
-	StatusCode *int
-	Body       *[]byte
-	Timestamp  *time.Time
+	ID           sql.NullInt64  `db:"res_id"`
+	RequestID    sql.NullInt64  `db:"res_req_id"`
+	Proto        sql.NullString `db:"res_proto"`
+	StatusCode   sql.NullInt64  `db:"status_code"`
+	StatusReason sql.NullString `db:"status_reason"`
+	Body         []byte         `db:"res_body"`
+	Timestamp    sql.NullTime   `db:"res_timestamp"`
+}
+
+// Value implements driver.Valuer.
+func (u *reqURL) Scan(value interface{}) error {
+	rawURL, ok := value.(string)
+	if !ok {
+		return errors.New("sqlite: cannot scan non-string value")
+	}
+
+	parsed, err := url.Parse(rawURL)
+	if err != nil {
+		return fmt.Errorf("sqlite: could not parse URL: %v", err)
+	}
+
+	*u = reqURL(*parsed)
+
+	return nil
+}
+
+func (dto httpRequest) toRequestLog() reqlog.Request {
+	u := url.URL(dto.URL)
+	reqLog := reqlog.Request{
+		ID: dto.ID,
+		Request: http.Request{
+			Proto:  dto.Proto,
+			Method: dto.Method,
+			URL:    &u,
+		},
+		Body:      dto.Body,
+		Timestamp: dto.Timestamp,
+	}
+
+	if dto.httpResponse.ID.Valid {
+		reqLog.Response = &reqlog.Response{
+			ID:        dto.httpResponse.ID.Int64,
+			RequestID: dto.httpResponse.RequestID.Int64,
+			Response: http.Response{
+				Status:     strconv.FormatInt(dto.StatusCode.Int64, 10) + " " + dto.StatusReason.String,
+				StatusCode: int(dto.StatusCode.Int64),
+				Proto:      dto.httpResponse.Proto.String,
+			},
+			Body:      dto.httpResponse.Body,
+			Timestamp: dto.httpResponse.Timestamp.Time,
+		}
+	}
+
+	return reqLog
 }