fix: parse multi reply with same message for all

internal/fourchan/parse.go

@@ -71,7 +71,14 @@ func explodePost(post Post) (posts []Post) {
 	}
 
 	// Add simple 1/1 reply/comment messages
-	if len(replies) == len(findings) && (len(replies) == 1 || !containsEmptyString(replies)) {
+	if len(replies) == len(findings) &&
+		(len(replies) == 1 || allEmptyButLast(replies) || !containsEmptyString(replies)) {
+
+		// squash many/1 reply/comment into 1/1
+		if allEmptyButLast(replies) {
+			replies = []string{replies[len(replies)-1]}
+		}
+
 		for i, reply := range replies {
 			parentId := getParentId(findings[i])
 			if parentId == 0 {
@@ -100,6 +107,18 @@ func explodePost(post Post) (posts []Post) {
 	return
 }
 
+func allEmptyButLast(replies []string) bool {
+	if len(replies) == 0 {
+		return false
+	}
+	for _, reply := range replies[:len(replies)-1] {
+		if reply != "" {
+			return false
+		}
+	}
+	return replies[len(replies)-1] != ""
+}
+
 func fixComments(comments []string) (ret []string) {
 	for _, comment := range comments {
 		ret = append(ret, plaintextComment(cleanComment(comment)))

internal/fourchan/parse_test.go

@@ -152,7 +152,7 @@ func TestExplodeNPosts(t *testing.T) {
 func TestNParents(t *testing.T) {
 	thread := toThread(testThread)
 	got := len(thread.posts)
-	expected := 8
+	expected := 7
 	if got != expected {
 		t.Errorf("got %d expected %d", got, expected)
 	}
@@ -190,3 +190,28 @@ func TestCleanComment(t *testing.T) {
 		}
 	}
 }
+
+func TestAllEmptyButLast(t *testing.T) {
+	testReplies := []struct {
+		replies  []string
+		expected bool
+	}{
+		{[]string{"", "", "foo"}, true},
+		{[]string{"foo", "bar"}, false},
+		{[]string{"", "foo"}, true},
+		{[]string{}, false},
+	}
+	for _, reply := range testReplies {
+		got := allEmptyButLast(reply.replies)
+		expected := reply.expected
+		if expected != got {
+			t.Errorf(
+				"got %t expected %t - (%d)%+v",
+				got,
+				expected,
+				len(reply.replies),
+				reply.replies,
+			)
+		}
+	}
+}