feat: webhook URL parse (#221)

* feat: webhook URL parse

Signed-off-by: jolheiser <john.olheiser@gmail.com>

* review: update func name

Co-authored-by: ToπSenpai <15636011+TopiSenpai@users.noreply.github.com>

* review: fix tests

Co-authored-by: ToπSenpai <15636011+TopiSenpai@users.noreply.github.com>

Signed-off-by: jolheiser <john.olheiser@gmail.com>
Co-authored-by: ToπSenpai <15636011+TopiSenpai@users.noreply.github.com>

webhook/webhook_client_impl.go

@@ -2,12 +2,36 @@ package webhook
 
 import (
 	"context"
+	"errors"
+	"net/url"
+	"strings"
 
 	"github.com/disgoorg/disgo/discord"
 	"github.com/disgoorg/disgo/rest"
 	"github.com/disgoorg/snowflake/v2"
 )
 
+// ParseURL parses a webhook URL
+func NewWithURL(webhook string, opts ...ConfigOpt) (Client, error) {
+	u, err := url.Parse(webhook)
+	if err != nil {
+		return nil, err
+	}
+
+	parts := strings.FieldsFunc(u.Path, func(r rune) bool { return r == '/' })
+	if len(parts) != 4 {
+		return nil, errors.New("invalid webhook URL")
+	}
+	id, token := parts[2], parts[3]
+
+	sf, err := snowflake.Parse(id)
+	if err != nil {
+		return nil, err
+	}
+
+	return New(sf, token, opts...), nil
+}
+
 // New creates a new Client with the given ID, token and ConfigOpt(s).
 func New(id snowflake.ID, token string, opts ...ConfigOpt) Client {
 	config := DefaultConfig()

webhook/webook_test.go

@@ -0,0 +1,56 @@
+package webhook
+
+import (
+	"testing"
+
+	"github.com/disgoorg/snowflake/v2"
+	"github.com/stretchr/testify/require"
+)
+
+func TestParseURL(t *testing.T) {
+	tt := []struct {
+		URL   string
+		ID    snowflake.ID
+		Token string
+		Err   bool
+	}{
+		{
+			URL:   "https://discord.com/api/webhooks/123456789123456789/foo",
+			ID:    snowflake.ID(123456789123456789),
+			Token: "foo",
+		},
+		{
+			URL:   "https://discord.com/api/webhooks/123456789123456789/foo/",
+			ID:    snowflake.ID(123456789123456789),
+			Token: "foo",
+		},
+		{
+			URL:   "https://canary.discord.com/api/webhooks/123456789123456789/foo",
+			ID:    snowflake.ID(123456789123456789),
+			Token: "foo",
+		},
+		{
+			URL: "foobarbaz",
+			Err: true,
+		},
+		{
+			URL:   "https://discord.com/api/webhooks/123456789123456789/foo?wait=10",
+			ID:    snowflake.ID(123456789123456789),
+			Token: "foo",
+		},
+	}
+
+	for _, tc := range tt {
+		t.Run(tc.URL, func(t *testing.T) {
+			assert := require.New(t)
+
+			c, err := NewWithURL(tc.URL)
+			if tc.Err {
+				assert.Error(err, "URL parsing should have resulted in an error")
+				return
+			}
+			assert.Equal(tc.ID, c.ID(), "URL ID should match")
+			assert.Equal(tc.Token, c.Token(), "URL token should match")
+		})
+	}
+}