getting strange issue while parsing data of the following items:

• Grand Charm of life
• Chipped Ruby

Currently no info about frequency of the behaviour

there is a lot of connections between various fields in item structure. IMO it needs an easy in use API

d2sdifficulty.Difficulty is a map-type. So I store pointer to it in main D2S structure, but the problem is, that reffering to a pointer-map is a bit... strange. it looks like `(*p.d2s.Difficulty)[d2enum.DifficultyNormal]. I suggest to add some api for this stuff or reduce this noise in some other way

for clearity, it could be cool, to add wrapcheck linter

each quests has some status notes. We need to parse them into Quest structure.
see more here

Currently, when we do:
ioutil.WriteFile("testchar.d2s", New().SetName("testchar").Encode(), 0o644)

package main

import (
	"io/ioutil"

	"github.com/gucio321/d2d2s/pkg/d2s"
)

func main() {
	data, _ := d2s.New().SetName("testchar").Encode()
	ioutil.WriteFile("testchar.d2s", data, 0o644)
}

we'll get

https://github.com/golang-standards/project-layout

Hi there, I'd like to describe used in a project tests template.
each _test.go file should look as follows:

1. testdata() map[*TestedType]binaryFormat method.
   this method should specify as much, as possible/necessary test cases in described map form
2. Test_Load(t *testing.T) this method is really easy

// declare testdata
td := testdata()

// testing loop
for key, value := range td {
    // load tested structure using data (value) given
    // in some cases, it could be necessary to create bitmuncher (datautils.CreateBitMuncher(value, 0) ) and pass it as an argument to load
    s := New()
    s.Load(value)

    // then just use `assert` to check results
    assert.Equal(t, key, s, "unexpected structure loaded")
}

3. Test_Encode(t *testing.T) is also really simple

td := testdata()
for key, value := range td {
    // encode tested structure into binary form (value)
    data := key.Encode()

    // use assert to detect differences
    assert.Equal(t, value, data, "unexpected data encoded")
}

Yo!
datautils was copied (and modified) from OpenDiablo2. It could be cool to get back to original base (using it as a dependency).
But base doesn't have some methods used here.
see OpenDiablo2/OpenDiablo2#1123

OpenDiablo2/OpenDiablo2 dependency is a wrong idea. there are 2 alternatives:

• use internal data reader (internal/datautils)
• use OpenDiablo2/bitstream

hmm, this giant nolint directive over the d2sitems/itemdata/item.go looks.... strange
I think, that it should be cut.
IMO gomnd could be left.

hmm. RareName1, RareName2 isn't ok

IMO names MagicalPrefix0, MagicalPrefix1 aren't correct 😀

it is a time, to split this d2s package into a several smaller 😀

+ d2s
   + d2sirongolem
    + d2smerc
    + d2sitems
        + itemdata
    + d2sdifficulty

e.t.c.

Yo!
d2senums/skill_id.go should contain enumeration of all skill IDs with its strings.
for list of them, see here

currently, attribute structure Name field and Values field
String method should join them and instead of +{0} to Strength [5] should print +5 to Strength

for more details, see here

currently, items.go wrapps d2s/d2s.go:ParseItemsList
We need to verify, if it is possible to encode this structure or it is needed to create a new decoder/encoder

also need to split some long methods to avoid nolint directives

Originally posted by @gucio321 in #8 (comment)

the save files has to contain a 32-bit checksum, because the game will not read them.

what do we know about this field?

• documentation
  

checksum needs to be calculated in the same way as file size.

Hi
currently, app stores merc code in an uint16 format, but there are known merc types and we need to enumerate them.
see here

For now, all data in Stats structure are uint64s or float64s
I think, that it could be something smaller

there is Item.ClassSpecific substructure. We need to parse Data to something human-readable

Cannot open and write again (with no diff) a new file created by retail d2 lod 1.14d (see test failure).
It seems not working since at least v1.1