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annotate src/core/filesystem.cc @ 391:c3f717b7321b

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filesystem: only iterate over the list once when erasing deleted files :)
author Paper <paper@tflc.us>
date Fri, 07 Nov 2025 07:09:31 -0500
parents 0265e125f680
children 963047512d34
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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2743011a6042 *: mass update
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1 #include "core/filesystem.h"
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cde8f67a7c7d *: update, megacommit :)
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2 #include "core/config.h"
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3 #include "core/strings.h"
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4
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5 #include <QStandardPaths>
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6
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7 #include <filesystem>
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8
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fc1bf97c528b *: use C++11 standard
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9 namespace Filesystem {
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10
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11 /* this runs fs::create_directories() on the
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12 PARENT directory. */
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13 void CreateDirectories(const std::filesystem::path &path)
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14 {
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15 if (path.empty())
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16 return;
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17
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18 const auto &parent = path.parent_path();
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19 if (!std::filesystem::exists(parent))
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20 std::filesystem::create_directories(parent);
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21 }
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22
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23 std::filesystem::path GetDotPath()
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24 {
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25 /*
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26 * Windows: ~/AppData/Roaming/Minori
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27 * macOS: ~/Library/Application Support/Minori
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28 * ...: ~/.config/minori
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29 *
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30 * FIXME: are windows and mac properly cased?
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31 */
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5c0397762b53 INCOMPLETE: megacommit :)
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32 #ifdef WIN32
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33 return Strings::ToUtf8String(QStandardPaths::writableLocation(QStandardPaths::AppDataLocation));
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34 #else
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35 return Strings::ToUtf8String(QStandardPaths::writableLocation(QStandardPaths::AppConfigLocation));
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36 #endif
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4b05bc7668eb filesystem: split config path into dotpath and config, add anime db path
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37 }
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38
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39 std::filesystem::path GetConfigPath()
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40 {
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41 return GetDotPath() / CONFIG_NAME;
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42 }
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43
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44 std::filesystem::path GetAnimeDBPath()
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45 {
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46 return GetDotPath() / "anime" / "db.json";
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47 }
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48
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49 std::filesystem::path GetTorrentsPath()
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50 {
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51 return GetDotPath() / "torrents";
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52 }
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53
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5912dafc6e28 anime: add poster cache
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54 std::filesystem::path GetAnimePostersPath()
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55 {
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56 return GetDotPath() / "anime" / "posters";
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57 }
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58
382
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59 /* ------------------------------------------------------------------------ */
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60 /* Ehhhhh */
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61
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62 class Watcher : public IWatcher {
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63 public:
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64 Watcher(void *opaque, const std::filesystem::path &path, EventHandler handler)
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65 : path_(path)
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66 , handler_(handler)
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67 , opaque_(opaque)
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68 {
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69 }
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70
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71 virtual ~Watcher() override
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72 {
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73 }
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74
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75 protected:
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76 std::filesystem::path path_;
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77 EventHandler handler_;
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78 void *opaque_;
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79 };
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80
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81 /* ------------------------------------------------------------------------ */
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82 /* Filesystem watcher.
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83 * This is the portable version for non-Windows (of which the Windows
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84 * specific version hasn't been written yet... TODO) */
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85
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86 template<typename T>
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87 class StdFilesystemWatcher : public Watcher {
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88 public:
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89 StdFilesystemWatcher(void *opaque, const std::filesystem::path &path, EventHandler handler)
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90 : Watcher(opaque, path, handler)
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91 {
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92 }
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93
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94 virtual ~StdFilesystemWatcher() override
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95 {
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96 }
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97
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98 virtual void Process() override
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99 {
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100 /* Untoggle all paths. This allows us to only ever
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101 * iterate over the directory ONCE. */
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102 UntoggleAllPaths();
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103
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104 for (const auto &item : T(path_)) {
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105 std::filesystem::path p = item.path();
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106
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107 if (FindAndTogglePath(p))
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108 continue;
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109
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110 /* Hand the path off to the listener */
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111 handler_(opaque_, p, Event::Created);
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112 paths_.push_back({true, p});
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113 }
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114
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115 DeleteUntoggledPaths();
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116 }
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117
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118 protected:
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119 bool FindAndTogglePath(const std::filesystem::path &p)
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120 {
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121 for (auto &pp : paths_) {
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122 if (pp.path == p) {
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123 pp.found = true;
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124 return true;
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125 }
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126 }
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127
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128 return false;
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129 }
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130
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131 void UntoggleAllPaths()
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132 {
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133 for (auto &pp : paths_)
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134 pp.found = false;
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135 }
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136
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137 void DeleteUntoggledPaths()
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138 {
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139 auto it = paths_.begin();
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140
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141 while (it != paths_.end()) {
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142 if (!it->found) {
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143 handler_(opaque_, it->path, Event::Deleted);
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144 it = paths_.erase(it);
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145 } else {
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146 it++;
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147 }
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148 }
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149 }
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150
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151 struct PathStatus {
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152 bool found;
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153 std::filesystem::path path;
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154 };
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155
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156 /* TODO this is probably DAMN slow */
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157 std::vector<PathStatus> paths_;
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158 };
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159
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160 IWatcher *GetRecursiveFilesystemWatcher(void *opaque,
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161 const std::filesystem::path &path, IWatcher::EventHandler handler)
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162 {
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163 /* .... :) */
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164 return new StdFilesystemWatcher<std::filesystem::recursive_directory_iterator>(opaque, path, handler);
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165 }
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166
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167 IWatcher *GetFilesystemWatcher(void *opaque, const std::filesystem::path &path, IWatcher::EventHandler handler)
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168 {
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169 return new StdFilesystemWatcher<std::filesystem::directory_iterator>(opaque, path, handler);
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170 }
0265e125f680 filesystem: implement filesystem watcher
Paper <paper@tflc.us>
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171
15
cde8f67a7c7d *: update, megacommit :)
Paper <mrpapersonic@gmail.com>
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172 } // namespace Filesystem