37 #include "Configuration.h" |
37 #include "Configuration.h" |
38 #include "AttributeFinder.h" |
38 #include "AttributeFinder.h" |
39 #include "FileAttributeFinder.h" |
39 #include "FileAttributeFinder.h" |
40 #include "XattrAttributeFinder.h" |
40 #include "XattrAttributeFinder.h" |
41 #include "StreamletAttributeFinder.h" |
41 #include "StreamletAttributeFinder.h" |
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42 #include "FilesystemWorker.h" |
42 |
43 |
43 namespace relpipe { |
44 namespace relpipe { |
44 namespace in { |
45 namespace in { |
45 namespace filesystem { |
46 namespace filesystem { |
46 |
47 |
47 namespace fs = std::filesystem; |
48 namespace fs = std::filesystem; |
48 using namespace relpipe::writer; |
49 using namespace relpipe::writer; |
49 |
50 |
50 class FilesystemCommand { |
51 class FilesystemCommand : public FilesystemWorker { |
51 protected: |
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52 std::wstring_convert<codecvt_utf8<wchar_t>> convertor; // TODO: support also other encodings. |
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53 |
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54 std::map<string_t, std::shared_ptr<AttributeFinder>> createAttributeFinders() { |
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55 return { |
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56 {RequestedField::GROUP_FILE, std::make_shared<FileAttributeFinder>()}, |
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57 {RequestedField::GROUP_STREAMLET, std::make_shared<StreamletAttributeFinder>()}, |
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58 {RequestedField::GROUP_XATTR, std::make_shared<XattrAttributeFinder>()}}; |
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59 } |
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60 |
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61 void reset(std::stringstream& stream) { |
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62 stream.str(""); |
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63 stream.clear(); |
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64 } |
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65 |
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66 bool readNext(std::istream& input, std::stringstream& originalName) { |
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67 for (char ch; input.get(ch);) { |
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68 if (ch == 0) return true; |
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69 else originalName << ch; |
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70 } |
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71 return originalName.tellp(); |
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72 } |
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73 |
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74 string_t fetchRelationName(Configuration* configuration) { |
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75 return configuration->relation.empty() ? L"filesystem" : configuration->relation; |
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76 } |
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77 |
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78 void writeHeader(RelationalWriter* writer, std::map<string_t, std::shared_ptr < AttributeFinder>> attributeFinders, string_t relationName, std::vector<RequestedField>* fields, bool writeHeader = true) { |
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79 std::vector<AttributeMetadata> attributesMetadata; |
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80 for (RequestedField field : *fields) { |
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81 std::shared_ptr<AttributeFinder> finder = attributeFinders[field.group]; |
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82 if (finder) for (AttributeMetadata m : finder->toMetadata(writer, relationName, field)) attributesMetadata.push_back(m); |
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83 else throw RelpipeWriterException(L"Unsupported field group: " + field.group); |
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84 } |
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85 |
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86 writer->startRelation(relationName, attributesMetadata, writeHeader); |
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87 } |
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88 |
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89 void processSingleFile(std::shared_ptr<RelationalWriter> writer, std::stringstream& originalName, std::map<string_t, std::shared_ptr < AttributeFinder>>&attributeFinders, Configuration& configuration, string_t relationName) { |
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90 fs::path file(originalName.str().empty() ? "." : originalName.str()); // interpret empty string as current directory (e.g. result of: find -printf '%P\0') |
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91 bool exists = false; |
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92 |
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93 try { |
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94 exists = fs::exists(file); |
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95 } catch (const fs::filesystem_error& e) { |
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96 // we probably do not have permissions to given directory → pretend that the file does not exist |
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97 } |
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98 |
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99 for (auto& finder : attributeFinders) finder.second->startFile(file, originalName.str(), exists); |
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100 |
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101 for (RequestedField field : configuration.fields) { |
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102 std::shared_ptr<AttributeFinder> finder = attributeFinders[field.group]; // should not be nullptr, because already checked while writing the relation metadata |
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103 finder->writeField(writer.get(), relationName, field); |
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104 } |
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105 |
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106 for (auto& finder : attributeFinders) finder.second->endFile(); |
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107 } |
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108 |
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109 public: |
52 public: |
110 |
53 |
111 virtual ~FilesystemCommand() = default; |
54 virtual ~FilesystemCommand() = default; |
112 |
55 |
113 virtual void process(int inputFD, int outputFD, Configuration& configuration) = 0; |
56 virtual void process(int inputFD, int outputFD, Configuration& configuration) = 0; |