Making it up as I go.

CO 30ish
R1-R10- k1p1 for 10 rows
R11-K2tog (on a knit stitch) yo
R12- k all
R13 kf/b every stitch (60sts)
Start ribbing cable pattern.
Groups of 10 - p2, k4, p2, k2
Row 1- p2, k4, p2 k2
Row 2- p2, k4, p2 (k2tog. Do not drop stitch knit into front stitch again) slip off both sts.
Row 3- p2,k4,p2,k2
Row4-p2, c4f, p2, k2tog. Do not drop stitch knit into front stitch again) slip off both sts.

Knit to length
K2tog, yo (for drawstring eyelets)
K5rows to curve in. BO

Pick up 7sts somewhere after eyelet row. Knitn in seed st till flap is long enough.

Buttonhole row seed st for 3 sts. K2tog. YO twice, k2tog, seed stitch.

Continue seed st till long enough.

Crochet ties for eyelet rows, sew on button, stuff.