pre cw with probe and a bunch script to read game behavior

internal/sdkserver/player_data_update.go

@@ -0,0 +1,104 @@
+package sdkserver
+
+import (
+	"encoding/json"
+	"fmt"
+	"os"
+
+	"gac-hkrpg-go/internal/common"
+)
+
+// POST patches fields; PUT explicitly replaces a complete player document.
+// Keep raw JSON values so unrelated IDs and numeric values are not rounded.
+func preparePlayerDataUpdate(existing, payload []byte, replace bool) ([]byte, error) {
+	var patch map[string]json.RawMessage
+	if err := json.Unmarshal(payload, &patch); err != nil || patch == nil {
+		return nil, fmt.Errorf("player data must be a JSON object")
+	}
+	result := make(map[string]json.RawMessage)
+	if replace {
+		for _, key := range []string{"avatars", "lightcones", "relics", "battle_config"} {
+			if _, present := patch[key]; !present {
+				return nil, fmt.Errorf("full replacement is missing %s; use POST for a partial update", key)
+			}
+		}
+		// FreeSR exports do not necessarily include the inventory editor's
+		// material overrides. Omission preserves them; an explicit materials
+		// object (including zero counts or {}) still replaces that field.
+		if _, present := patch["materials"]; !present && len(existing) != 0 {
+			var current map[string]json.RawMessage
+			if err := json.Unmarshal(existing, &current); err != nil || current == nil {
+				return nil, fmt.Errorf("existing player data is invalid; restore it before applying updates")
+			}
+			if value, present := current["materials"]; present {
+				result["materials"] = value
+			}
+		}
+	} else if err := json.Unmarshal(existing, &result); err != nil || result == nil {
+		return nil, fmt.Errorf("existing player data is invalid; restore it before applying updates")
+	}
+	for key, value := range patch {
+		if key == "avatars" && !replace {
+			var incoming map[string]json.RawMessage
+			if err := json.Unmarshal(value, &incoming); err != nil || len(incoming) == 0 {
+				return nil, fmt.Errorf("avatars update must be a non-empty object")
+			}
+			current := make(map[string]json.RawMessage)
+			if raw, found := result[key]; found {
+				if err := json.Unmarshal(raw, &current); err != nil || current == nil {
+					return nil, fmt.Errorf("existing avatars data is invalid")
+				}
+			}
+			for id, avatar := range incoming {
+				current[id] = avatar
+			}
+			merged, err := json.Marshal(current)
+			if err != nil {
+				return nil, err
+			}
+			result[key] = merged
+		} else {
+			result[key] = value
+		}
+	}
+	out, err := json.MarshalIndent(result, "", "  ")
+	if err != nil {
+		return nil, err
+	}
+	var data common.FreesrData
+	if err := json.Unmarshal(out, &data); err != nil {
+		return nil, fmt.Errorf("invalid player data: %w", err)
+	}
+	if err := common.ValidateAvatarRoster(data.Avatars); err != nil {
+		return nil, err
+	}
+	if saved, err := common.ReadPersistent(); err == nil {
+		if err := common.ValidateAdventureLineup(data.Avatars, saved.Lineups); err != nil {
+			return nil, err
+		}
+	} else if !os.IsNotExist(err) {
+		return nil, fmt.Errorf("cannot validate active lineup: %w", err)
+	}
+	return out, nil
+}
+
+func writePlayerDataAtomic(data []byte) error {
+	file, err := os.CreateTemp(".", ".gac-freesr-*.tmp")
+	if err != nil {
+		return err
+	}
+	name := file.Name()
+	defer os.Remove(name)
+	if _, err := file.Write(data); err != nil {
+		file.Close()
+		return err
+	}
+	if err := file.Sync(); err != nil {
+		file.Close()
+		return err
+	}
+	if err := file.Close(); err != nil {
+		return err
+	}
+	return os.Rename(name, "freesr-data.json")
+}