7487858638

Committed 11 Jan 2024 11:05AM CUT coverage: 83.468% (-0.3%) from 83.766%

Build # 7487858638

Build Type

Pull #3

github

Committed by

web-flow

Commit Message

Merge 7ca67c00c into 8937cb386

Pull Request Pull Request #3: Serialize entity relations

Run Details

207 of 248 relevant lines covered (83.47%)

28.39 hits per line

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79.31

/deserialize.go

package archeserde

import (
        "encoding/json"
        "fmt"
        "reflect"

        "github.com/mlange-42/arche/ecs"
)

// Deserialize an Arche [ecs.World] from JSON.
//
// The world must be prepared the following way:
//   - All required component types must be registered using [ecs.ComponentID]
//   - All required resources must be added using [ecs.AddResource]
func Deserialize(jsonData []byte, world *ecs.World) error {
        infos := map[ecs.ID]ecs.CompInfo{}
        ids := map[string]ecs.ID{}
        for i := 0; i < ecs.MaskTotalBits; i++ {
                if info, ok := ecs.ComponentInfo(world, ecs.ID(i)); ok {
                        infos[ecs.ID(i)] = info
                        ids[info.Type.String()] = ecs.ID(i)
                }
        }

        resTypes := map[ecs.ResID]reflect.Type{}
        resIds := map[string]ecs.ResID{}
        for i := 0; i < ecs.MaskTotalBits; i++ {
                if tp, ok := ecs.ResourceType(world, ecs.ResID(i)); ok {
                        resTypes[ecs.ResID(i)] = tp
                        resIds[tp.String()] = ecs.ResID(i)
                }
        }

        deserial := deserializer{}

        if err := json.Unmarshal(jsonData, &deserial); err != nil {
                return err
        }

        world.SetEntityData(&deserial.World)

        for _, tp := range deserial.Types {
                if _, ok := ids[tp]; !ok {
                        return fmt.Errorf("component type is not registered: %s", tp)
                }
        }

        entityMap := map[ecs.Entity]int{}
        for idx, entity := range deserial.Entities {
                entityMap[entity] = idx
        }

        for i, comps := range deserial.Components {
                entity := deserial.Entities[i]

                mp := map[string]entry{}

                if err := json.Unmarshal(comps.Bytes, &mp); err != nil {
                        return err
                }

                target := ecs.Entity{}
                var targetComp ecs.ID
                components := []ecs.Component{}
                for tpName, value := range mp {
                        if tpName == targetTag {
                                if err := json.Unmarshal(value.Bytes, &target); err != nil {
                                        return err
                                }
                                continue
                        }

                        id := ids[tpName]
                        info := infos[id]

                        if info.IsRelation {
                                targetComp = id
                        }

                        component := reflect.New(info.Type).Interface()
                        if err := json.Unmarshal(value.Bytes, &component); err != nil {
                                return err
                        }
                        components = append(components, ecs.Component{
                                ID:   id,
                                Comp: component,
                        })
                }

                world.Assign(entity, components...)
                if !target.IsZero() {
                        world.Relations().Set(entity, targetComp, target)
                }
        }

        for tpName, res := range deserial.Resources {
                resID, ok := resIds[tpName]
                if !ok {
                        return fmt.Errorf("resource type is not registered: %s", tpName)
                }

                tp := resTypes[resID]
                resource := reflect.New(tp).Interface()
                if err := json.Unmarshal(res.Bytes, &resource); err != nil {
                        return err
                }

                resLoc := world.Resources().Get(resID)
                if resLoc == nil {
                        return fmt.Errorf("resource type registered but nil: %s", tpName)
                }

                rValue := reflect.ValueOf(resLoc)
                ptr := rValue.UnsafePointer()
                value := reflect.NewAt(tp, ptr).Interface()

                if err := json.Unmarshal(res.Bytes, &value); err != nil {
                        return err
                }
        }

        return nil
}

1	package archeserde
2
3	import (
4	"encoding/json"
5	"fmt"
6	"reflect"
7
8	"github.com/mlange-42/arche/ecs"
9	)
10
11	// Deserialize an Arche [ecs.World] from JSON.
12	//
13	// The world must be prepared the following way:
14	// - All required component types must be registered using [ecs.ComponentID]
15	// - All required resources must be added using [ecs.AddResource]
16	func Deserialize(jsonData []byte, world *ecs.World) error {	3✔
17	infos := map[ecs.ID]ecs.CompInfo{}	3✔
18	ids := map[string]ecs.ID{}	3✔
19	for i := 0; i < ecs.MaskTotalBits; i++ {	771✔
20	if info, ok := ecs.ComponentInfo(world, ecs.ID(i)); ok {	773✔
21	infos[ecs.ID(i)] = info	5✔
22	ids[info.Type.String()] = ecs.ID(i)	5✔
23	}	5✔
24	}
25
26	resTypes := map[ecs.ResID]reflect.Type{}	3✔
27	resIds := map[string]ecs.ResID{}	3✔
28	for i := 0; i < ecs.MaskTotalBits; i++ {	771✔
29	if tp, ok := ecs.ResourceType(world, ecs.ResID(i)); ok {	769✔
30	resTypes[ecs.ResID(i)] = tp	1✔
31	resIds[tp.String()] = ecs.ResID(i)	1✔
32	}	1✔
33	}
34
35	deserial := deserializer{}	3✔
36		3✔
37	if err := json.Unmarshal(jsonData, &deserial); err != nil {	3✔
38	return err	×
39	}	×
40
41	world.SetEntityData(&deserial.World)	3✔
42		3✔
43	for _, tp := range deserial.Types {	8✔
44	if _, ok := ids[tp]; !ok {	5✔
45	return fmt.Errorf("component type is not registered: %s", tp)	×
46	}	×
47	}
48
49	entityMap := map[ecs.Entity]int{}	3✔
50	for idx, entity := range deserial.Entities {	8✔
51	entityMap[entity] = idx	5✔
52	}	5✔
53
54	for i, comps := range deserial.Components {	8✔
55	entity := deserial.Entities[i]	5✔
56		5✔
57	mp := map[string]entry{}	5✔
58		5✔
59	if err := json.Unmarshal(comps.Bytes, &mp); err != nil {	5✔
60	return err	×
61	}	×
62
63	target := ecs.Entity{}	5✔
64	var targetComp ecs.ID	5✔
65	components := []ecs.Component{}	5✔
66	for tpName, value := range mp {	16✔
67	if tpName == targetTag {	13✔
68	if err := json.Unmarshal(value.Bytes, &target); err != nil {	2✔
69	return err	×
70	}	×
71	continue	2✔
72	}
73
74	id := ids[tpName]	9✔
75	info := infos[id]	9✔
76		9✔
77	if info.IsRelation {	11✔
78	targetComp = id	2✔
79	}	2✔
80
81	component := reflect.New(info.Type).Interface()	9✔
82	if err := json.Unmarshal(value.Bytes, &component); err != nil {	9✔
83	return err	×
84	}	×
85	components = append(components, ecs.Component{	9✔
86	ID: id,	9✔
87	Comp: component,	9✔
88	})	9✔
89	}
90
91	world.Assign(entity, components...)	5✔
92	if !target.IsZero() {	6✔
93	world.Relations().Set(entity, targetComp, target)	1✔
94	}	1✔
95	}
96
97	for tpName, res := range deserial.Resources {	4✔
98	resID, ok := resIds[tpName]	1✔
99	if !ok {	1✔
100	return fmt.Errorf("resource type is not registered: %s", tpName)	×
101	}	×
102
103	tp := resTypes[resID]	1✔
104	resource := reflect.New(tp).Interface()	1✔
105	if err := json.Unmarshal(res.Bytes, &resource); err != nil {	1✔
106	return err	×
107	}	×
108
109	resLoc := world.Resources().Get(resID)	1✔
110	if resLoc == nil {	1✔
111	return fmt.Errorf("resource type registered but nil: %s", tpName)	×
112	}	×
113
114	rValue := reflect.ValueOf(resLoc)	1✔
115	ptr := rValue.UnsafePointer()	1✔
116	value := reflect.NewAt(tp, ptr).Interface()	1✔
117		1✔
118	if err := json.Unmarshal(res.Bytes, &value); err != nil {	1✔
119	return err	×
120	}	×
121	}
122
123	return nil	3✔
124	}

mlange-42 / arche-serde / 7487858638

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