Add divide chunk fn (#40)

* add divide chunk file

* add readZipContent fn

* fmt

* change zip pkg name

* review

* review changes

* add tests

* lint

* fix syntax

* improve test

go.mod

@@ -1,3 +1,11 @@
 module github.com/massalabs/DeWeb
 
-go 1.22
+go 1.22
+
+require github.com/stretchr/testify v1.9.0
+
+require (
+	github.com/davecgh/go-spew v1.1.1 // indirect
+	github.com/pmezard/go-difflib v1.0.0 // indirect
+	gopkg.in/yaml.v3 v3.0.1 // indirect
+)

go.sum

@@ -0,0 +1,10 @@
+github.com/davecgh/go-spew v1.1.1 h1:vj9j/u1bqnvCEfJOwUhtlOARqs3+rkHYY13jYWTU97c=
+github.com/davecgh/go-spew v1.1.1/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
+github.com/pmezard/go-difflib v1.0.0 h1:4DBwDE0NGyQoBHbLQYPwSUPoCMWR5BEzIk/f1lZbAQM=
+github.com/pmezard/go-difflib v1.0.0/go.mod h1:iKH77koFhYxTK1pcRnkKkqfTogsbg7gZNVY4sRDYZ/4=
+github.com/stretchr/testify v1.9.0 h1:HtqpIVDClZ4nwg75+f6Lvsy/wHu+3BoSGCbBAcpTsTg=
+github.com/stretchr/testify v1.9.0/go.mod h1:r2ic/lqez/lEtzL7wO/rwa5dbSLXVDPFyf8C91i36aY=
+gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405 h1:yhCVgyC4o1eVCa2tZl7eS0r+SDo693bJlVdllGtEeKM=
+gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
+gopkg.in/yaml.v3 v3.0.1 h1:fxVm/GzAzEWqLHuvctI91KS9hhNmmWOoWu0XTYJS7CA=
+gopkg.in/yaml.v3 v3.0.1/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=

pkg/website/chunk.go

@@ -0,0 +1,20 @@
+package chunk
+
+func DivideIntoChunks(data []byte, chunkSize int) [][]byte {
+	if data == nil || chunkSize <= 0 {
+		return nil
+	}
+
+	var chunks [][]byte
+
+	for i := 0; i < len(data); i += chunkSize {
+		end := i + chunkSize
+		if end > len(data) {
+			end = len(data)
+		}
+
+		chunks = append(chunks, data[i:end])
+	}
+
+	return chunks
+}

pkg/website/chunk_test.go

@@ -0,0 +1,38 @@
+package chunk
+
+import (
+	"testing"
+
+	"github.com/stretchr/testify/assert"
+)
+
+func TestChunk(t *testing.T) {
+	tests := []struct {
+		name      string
+		data      []byte
+		chunkSize int
+	}{
+		{"Empty byte array", []byte(nil), 2},
+		{"Nil chunkSize", []byte("Hello"), 0},
+		{"Nominal test case", []byte("Hello, World!"), 1},
+		{"Median", []byte("Hello, World!"), 4},
+		{"Big byte array", []byte("Lorem ipsum dolor sit amet, consectetur adipiscing elit."), 16},
+		{"Small byte array", []byte("hello"), 32},
+	}
+
+	for _, test := range tests {
+		t.Run(test.name, func(t *testing.T) {
+			chunks := DivideIntoChunks(test.data, test.chunkSize)
+
+			if test.data == nil || test.chunkSize <= 0 {
+				assert.Nil(t, chunks)
+
+				return
+			}
+
+			expectedLen := (len(test.data) + test.chunkSize - 1) / test.chunkSize
+
+			assert.Equal(t, len(chunks), expectedLen)
+		})
+	}
+}