feat: Initial prototype

pkg/diyanet/scraper.go

@@ -0,0 +1,64 @@
+package diyanet
+
+import (
+	"context"
+	"fmt"
+	"regexp"
+	"time"
+
+	"github.com/PuerkitoBio/goquery"
+
+	"prayertimes/pkg/prayer"
+)
+
+type Fetcher interface {
+	FetchParsed(ctx context.Context, url string) (*goquery.Document, error)
+}
+
+type Diyanet struct {
+	FetcherFunc func(ctx context.Context, url string) (*goquery.Document, error)
+}
+
+var reNumeric = regexp.MustCompile(`\d+`)
+
+func validateLocation(location string) error {
+	if !reNumeric.MatchString(location) {
+		return fmt.Errorf("invalid location id")
+	}
+	return nil
+}
+
+func (d Diyanet) Get(ctx context.Context, location string) ([]prayer.Times, error) {
+	if err := validateLocation(location); err != nil {
+		return nil, fmt.Errorf("%w: %v", prayer.ErrInvalidLocation, err)
+	}
+
+	u := fmt.Sprintf("https://namazvakitleri.diyanet.gov.tr/en-US/%s", location)
+	doc, err := d.FetcherFunc(ctx, u)
+	if err != nil {
+		return nil, fmt.Errorf("failed to fetch location %q: %w", location, err)
+	}
+
+	var times []prayer.Times
+
+	doc.Find("#tab-1 .vakit-table tbody tr").Each(func(_ int, el *goquery.Selection) {
+		date := el.Find("td:first-of-type").Text()
+		parsedDate, err := time.Parse("02.01.2006", date)
+		if err != nil {
+			return
+		}
+
+		row := prayer.Times{
+			Date:    parsedDate,
+			Fajr:    el.Find("td:nth-of-type(2)").Text(),
+			Sunrise: el.Find("td:nth-of-type(3)").Text(),
+			Dhuhr:   el.Find("td:nth-of-type(4)").Text(),
+			Asr:     el.Find("td:nth-of-type(5)").Text(),
+			Maghrib: el.Find("td:nth-of-type(6)").Text(),
+			Isha:    el.Find("td:nth-of-type(7)").Text(),
+		}
+		times = append(times, row)
+	})
+
+	return times, err
+}

pkg/diyanet/scraper_test.go

@@ -0,0 +1,113 @@
+package diyanet
+
+import (
+	"context"
+	"strings"
+	"testing"
+	"time"
+
+	"github.com/PuerkitoBio/goquery"
+	"github.com/stretchr/testify/assert"
+
+	"prayertimes/internal/scrapeutils"
+	"prayertimes/pkg/prayer"
+)
+
+type mockFetcher string
+
+func (f mockFetcher) Fetch(_ context.Context, _ string) (*goquery.Document, error) {
+	return goquery.NewDocumentFromReader(strings.NewReader(string(f)))
+}
+
+const mockHtml = `
+<div id='tab-1'>
+    <div class='table-responsive'>
+        <table class='table vakit-table'>
+            <caption>Monthly Prayer Times for Some Location</caption>
+            <thead>
+            <tr>
+                <th>Gregorian Calendar Date</th>
+                <th>Fajr</th>
+                <th>Sun</th>
+                <th>Dhuhr</th>
+                <th>Asr</th>
+                <th>Maghrib</th>
+                <th>Isha</th>
+            </tr>
+            </thead>
+            <tbody>
+            <tr>
+                <td>04.03.2023</td>
+                <td>05:48</td>
+                <td>07:11</td>
+                <td>13:05</td>
+                <td>16:15</td>
+                <td>18:49</td>
+                <td>20:06</td>
+            </tr>
+            <tr>
+                <td>05.03.2023</td>
+                <td>05:46</td>
+                <td>07:09</td>
+                <td>13:04</td>
+                <td>16:15</td>
+                <td>18:50</td>
+                <td>20:07</td>
+            </tr>
+            </tbody>
+        </table>
+    </div>
+</div>
+`
+
+func TestDiyanet_Get(t *testing.T) {
+	t.Run("validates location", func(t *testing.T) {
+		d := Diyanet{}
+		_, err := d.Get(context.Background(), " not numeric ")
+		assert.ErrorIs(t, err, prayer.ErrInvalidLocation)
+	})
+
+	t.Run("extracts prayer times", func(t *testing.T) {
+		d := Diyanet{
+			FetcherFunc: mockFetcher(mockHtml).Fetch,
+		}
+		actual, err := d.Get(context.Background(), "1234")
+		assert.NoError(t, err)
+
+		expected := []prayer.Times{
+			{
+				Date:    time.Date(2023, time.March, 4, 0, 0, 0, 0, time.UTC),
+				Fajr:    "05:48",
+				Sunrise: "07:11",
+				Dhuhr:   "13:05",
+				Asr:     "16:15",
+				Maghrib: "18:49",
+				Isha:    "20:06",
+			},
+			{
+				Date:    time.Date(2023, time.March, 5, 0, 0, 0, 0, time.UTC),
+				Fajr:    "05:46",
+				Sunrise: "07:09",
+				Dhuhr:   "13:04",
+				Asr:     "16:15",
+				Maghrib: "18:50",
+				Isha:    "20:07",
+			},
+		}
+		assert.Equal(t, expected, actual)
+	})
+
+	t.Run("real endpoint", func(t *testing.T) {
+		if testing.Short() {
+			t.Skip()
+		}
+
+		d := Diyanet{
+			FetcherFunc: scrapeutils.GetParsed,
+		}
+		times, err := d.Get(context.Background(), "9205")
+		assert.NoError(t, err)
+		assert.Greater(t, len(times), 1)
+		assert.NotZero(t, times[0].Date)
+	})
+}