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feat: group member full sync and incr sync.
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,97 @@ | ||
| package datafetcher | ||
|
|
||
| import ( | ||
| "context" | ||
| "github.com/openimsdk/openim-sdk-core/v3/pkg/db/db_interface" | ||
| "github.com/openimsdk/tools/errs" | ||
| "github.com/openimsdk/tools/utils/datautil" | ||
| ) | ||
|
|
||
| // DataFetcher is a struct that handles data synchronization | ||
| type DataFetcher[T any] struct { | ||
| db db_interface.VersionSyncModel | ||
| TabName string | ||
| EntityID string | ||
| Key func(T) string | ||
| batchInsert func(ctx context.Context, servers []T) error | ||
| FetchFromLocal FetchDataFunc[T] | ||
| fetchFromServer FetchFromServerFunc[T] | ||
| } | ||
|
|
||
| // FetchDataFunc is a function type for fetching data | ||
| type FetchDataFunc[T any] func(ctx context.Context, uids []string) ([]T, error) | ||
|
|
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| // FetchFromServerFunc is a function type for fetching data from server | ||
| type FetchFromServerFunc[T any] func(ctx context.Context, uids []string) ([]T, error) | ||
|
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| // NewDataFetcher creates a new NewDataFetcher | ||
| func NewDataFetcher[T any](db db_interface.VersionSyncModel, tabName string, entityID string, key func(T) string, | ||
| batchInsert func(ctx context.Context, servers []T) error, fetchFromLocal FetchDataFunc[T], fetchFromServer FetchFromServerFunc[T]) *DataFetcher[T] { | ||
| return &DataFetcher[T]{ | ||
| db: db, | ||
| TabName: tabName, | ||
| EntityID: entityID, | ||
| Key: key, | ||
| batchInsert: batchInsert, | ||
| FetchFromLocal: fetchFromLocal, | ||
| fetchFromServer: fetchFromServer, | ||
| } | ||
| } | ||
|
|
||
| // FetchWithPagination fetches data with pagination and fills missing data from server | ||
| func (ds *DataFetcher[T]) FetchWithPagination(ctx context.Context, offset, limit int) ([]T, error) { | ||
| versionInfo, err := ds.db.GetVersionSync(ctx, ds.TabName, ds.EntityID) | ||
| if err != nil { | ||
| return nil, err | ||
| } | ||
|
|
||
| if offset > len(versionInfo.UIDList) { | ||
| return nil, errs.New("offset exceeds the length of the UID list").Wrap() | ||
| } | ||
|
|
||
| end := offset + limit | ||
| if end > len(versionInfo.UIDList) { | ||
| end = len(versionInfo.UIDList) | ||
| } | ||
|
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| paginatedUIDs := versionInfo.UIDList[offset:end] | ||
|
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| localData, err := ds.FetchMissingAndFillLocal(ctx, paginatedUIDs) | ||
| if err != nil { | ||
| return nil, err | ||
| } | ||
|
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| return localData, nil | ||
| } | ||
|
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||
| // FetchMissingAndFillLocal fetches missing data from server and fills local database | ||
| func (ds *DataFetcher[T]) FetchMissingAndFillLocal(ctx context.Context, uids []string) ([]T, error) { | ||
| localData, err := ds.FetchFromLocal(ctx, uids) | ||
| if err != nil { | ||
| return nil, err | ||
| } | ||
|
|
||
| localUIDSet := datautil.SliceSetAny(localData, ds.Key) | ||
|
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||
| var missingUIDs []string | ||
| for _, uid := range uids { | ||
| if _, found := localUIDSet[uid]; !found { | ||
| missingUIDs = append(missingUIDs, uid) | ||
| } | ||
| } | ||
|
|
||
| if len(missingUIDs) > 0 { | ||
| serverData, err := ds.fetchFromServer(ctx, missingUIDs) | ||
| if err != nil { | ||
| return nil, err | ||
| } | ||
|
|
||
| if err := ds.batchInsert(ctx, serverData); err != nil { | ||
| return nil, err | ||
| } | ||
|
|
||
| localData = append(localData, serverData...) | ||
| } | ||
|
|
||
| return localData, nil | ||
| } |
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