| 1 | #pragma once |
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| 2 | |
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| 3 | #include <mbgl/storage/offline.hpp> |
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| 4 | #include <mbgl/storage/resource.hpp> |
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| 5 | |
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| 6 | #include <list> |
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| 7 | #include <unordered_set> |
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| 8 | #include <memory> |
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| 9 | #include <deque> |
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| 10 | |
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| 11 | namespace mbgl { |
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| 12 | |
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| 13 | class OfflineDatabase; |
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| 14 | class FileSource; |
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| 15 | class AsyncRequest; |
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| 16 | class Response; |
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| 17 | class Tileset; |
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| 18 | |
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| 19 | namespace style { |
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| 20 | class Parser; |
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| 21 | } // namespace style |
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| 22 | |
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| 23 | /** |
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| 24 | * Coordinates the request and storage of all resources for an offline region. |
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| 25 | |
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| 26 | * @private |
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| 27 | */ |
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| 28 | class OfflineDownload { |
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| 29 | public: |
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| 30 | OfflineDownload(int64_t id, OfflineRegionDefinition&&, OfflineDatabase& offline, FileSource& online); |
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| 31 | ~OfflineDownload(); |
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| 32 | |
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| 33 | void setObserver(std::unique_ptr<OfflineRegionObserver>); |
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| 34 | void setState(OfflineRegionDownloadState); |
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| 35 | |
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| 36 | OfflineRegionStatus getStatus() const; |
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| 37 | |
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| 38 | private: |
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| 39 | void activateDownload(); |
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| 40 | void continueDownload(); |
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| 41 | void deactivateDownload(); |
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| 42 | |
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| 43 | /* |
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| 44 | * Ensure that the resource is stored in the database, requesting it if necessary. |
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| 45 | * While the request is in progress, it is recorded in `requests`. If the download |
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| 46 | * is deactivated, all in progress requests are cancelled. |
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| 47 | */ |
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| 48 | void ensureResource(const Resource&, std::function<void (Response)> = {}); |
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| 49 | |
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| 50 | void onMapboxTileCountLimitExceeded(); |
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| 51 | |
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| 52 | int64_t id; |
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| 53 | OfflineRegionDefinition definition; |
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| 54 | OfflineDatabase& offlineDatabase; |
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| 55 | FileSource& onlineFileSource; |
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| 56 | OfflineRegionStatus status; |
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| 57 | std::unique_ptr<OfflineRegionObserver> observer; |
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| 58 | |
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| 59 | std::list<std::unique_ptr<AsyncRequest>> requests; |
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| 60 | std::unordered_set<std::string> requiredSourceURLs; |
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| 61 | std::deque<Resource> resourcesRemaining; |
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| 62 | std::list<std::tuple<Resource, Response>> buffer; |
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| 63 | |
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| 64 | void queueResource(Resource); |
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| 65 | void queueTiles(style::SourceType, uint16_t tileSize, const Tileset&); |
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| 66 | }; |
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| 67 | |
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| 68 | } // namespace mbgl |
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| 69 | |
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