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1 /*******************************************************************************
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2
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3 copyright: Copyright (c) 2007 Kris Bell. All rights reserved
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4
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5 license: BSD style: $(LICENSE)
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6
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7 version: Oct 2007: Initial version
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8
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9 author: Kris
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10
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11 *******************************************************************************/
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12
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13 module tango.io.vfs.FileFolder;
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14
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15 private import tango.io.FilePath,
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16 tango.io.FileConduit;
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17
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18 private import tango.util.PathUtil;
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19
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20 private import tango.core.Exception;
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21
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22 private import tango.io.vfs.model.Vfs;
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23
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24 private import tango.io.model.IConduit;
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25
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26 /*******************************************************************************
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27
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28 Represents a physical folder in a file system. Use one of these
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29 to address specific paths (sub-trees) within the file system.
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30
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31 *******************************************************************************/
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32
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33 class FileFolder : VfsFolder
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34 {
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35 private FilePath path;
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36 private VfsStats stats;
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37
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38 /***********************************************************************
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39
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40 Create a file folder with the given name and path. The
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41 name itself should not include '.' or '/' characters,
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42 though the path can point at whatever it pleases.
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43
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44 Option 'create' will create the folder when set true,
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45 and open an existing folder otherwise
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46
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47 ***********************************************************************/
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48
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49 this (char[] path, bool create=false)
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50 {
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51 this.path = open (FilePath(path), create);
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52 }
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53
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54 /***********************************************************************
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55
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56 create a FileFolder as a Group member
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57
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58 ***********************************************************************/
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59
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60 private this (FilePath path)
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61 {
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62 this.path = path;
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63 }
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64
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65 /***********************************************************************
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66
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67 explicitly create() or open() a named folder
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68
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69 ***********************************************************************/
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70
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71 private this (FileFolder parent, char[] name, bool create=false)
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72 {
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73 assert (parent);
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74 this.path = open (parent.path.dup.append(name), create);
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75 }
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76
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77 /***********************************************************************
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78
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79 Return a short name
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80
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81 ***********************************************************************/
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82
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83 final char[] name ()
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84 {
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85 return path.name;
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86 }
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87
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88 /***********************************************************************
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89
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90 Return a long name
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91
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92 ***********************************************************************/
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93
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94 final char[] toString ()
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95 {
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96 return path.toString;
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97 }
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98
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99 /***********************************************************************
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100
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101 A folder is being added or removed from the hierarchy. Use
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102 this to test for validity (or whatever) and throw exceptions
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103 as necessary
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104
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105 Here we test for folder overlap, and bail-out when found.
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106
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107 ***********************************************************************/
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108
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109 final void verify (VfsFolder folder, bool mounting)
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110 {
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111 if (mounting && cast(FileFolder) folder)
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112 {
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113 auto src = FilePath.padded(this.toString);
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114 auto dst = FilePath.padded(folder.toString);
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115
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116 auto len = src.length;
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117 if (len > dst.length)
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118 len = dst.length;
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119
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120 if (src[0..len] == dst[0..len])
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121 error ("folders '"~dst~"' and '"~src~"' overlap");
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122 }
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123 }
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124
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125 /***********************************************************************
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126
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127 Return a contained file representation
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128
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129 ***********************************************************************/
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130
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131 final VfsFile file (char[] name)
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132 {
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133 return (new FileHost).set (path.toString, name);
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134 }
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135
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136 /***********************************************************************
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137
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138 Return a contained folder representation
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139
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140 ***********************************************************************/
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141
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142 final VfsFolderEntry folder (char[] path)
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143 {
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144 return new FolderHost (this, path);
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145 }
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146
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147 /***********************************************************************
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148
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149 Remove the folder subtree
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150
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151 ***********************************************************************/
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152
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153 final VfsFolder clear ()
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154 {
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155 path.remove;
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156 return this;
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157 }
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158
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159 /***********************************************************************
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160
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161 Is folder writable?
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162
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163 ***********************************************************************/
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164
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165 final bool writable ()
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166 {
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167 return path.isWritable;
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168 }
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169
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170 /***********************************************************************
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171
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172 Returns content information about this folder
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173
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174 ***********************************************************************/
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175
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176 final VfsFolders self ()
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177 {
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178 return new FolderGroup (this, false);
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179 }
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180
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181 /***********************************************************************
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182
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183 Returns a subtree of folders matching the given name
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184
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185 ***********************************************************************/
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186
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187 final VfsFolders tree ()
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188 {
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189 return new FolderGroup (this, true);
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190 }
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191
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192 /***********************************************************************
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193
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194 Iterate over the set of immediate child folders. This is
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195 useful for reflecting the hierarchy
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196
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197 ***********************************************************************/
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198
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199 final int opApply (int delegate(inout VfsFolder) dg)
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200 {
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201 int result;
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202
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203 foreach (folder; folders(true))
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204 {
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205 VfsFolder x = folder;
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206 if ((result = dg(x)) != 0)
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207 break;
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208 }
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209 return result;
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210 }
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211
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212 /***********************************************************************
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213
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214 Close and/or synchronize changes made to this folder. Each
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215 driver should take advantage of this as appropriate, perhaps
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216 combining multiple files together, or possibly copying to a
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217 remote location
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218
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219 ***********************************************************************/
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220
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221 VfsFolder close (bool commit = true)
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222 {
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223 return this;
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224 }
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225
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226 /***********************************************************************
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227
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228 Sweep owned folders
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229
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230 ***********************************************************************/
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231
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232 private final FileFolder[] folders (bool collect)
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233 {
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234 FileFolder[] folders;
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235
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236 stats = stats.init;
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237 foreach (info; path)
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238 if (info.folder)
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239 {
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240 if (collect)
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241 folders ~= new FileFolder (FilePath.from (info));
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242 ++stats.folders;
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243 }
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244 else
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245 {
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246 stats.bytes += info.bytes;
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247 ++stats.files;
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248 }
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249
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250 return folders;
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251 }
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252
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253
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254 /***********************************************************************
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255
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256 Sweep owned files
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257
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258 ***********************************************************************/
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259
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260 private final FilePath[] files (ref VfsStats stats, VfsFilter filter = null)
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261 {
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262 FilePath[] files;
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263
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264 foreach (info; path)
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265 if (info.folder is false)
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266 if (filter is null || filter(cast(VfsInfo) &info))
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267 {
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268 files ~= FilePath.from (info);
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269 stats.bytes += info.bytes;
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270 ++stats.files;
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271 }
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272
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273 return files;
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274 }
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275
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276 /***********************************************************************
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277
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278 Throw an exception
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279
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280 ***********************************************************************/
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281
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282 private final char[] error (char[] msg)
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283 {
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284 throw new VfsException (msg);
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285 }
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286
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287 /***********************************************************************
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288
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289 Create or open the given path, and detect path errors
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290
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291 ***********************************************************************/
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292
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293 private final FilePath open (FilePath path, bool create)
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294 {
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295 if (path.exists)
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296 {
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297 if (path.isFolder is false)
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298 error ("FileFolder.open :: path exists but not as a folder: "~path.toString);
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299 }
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300 else
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301 if (create)
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302 path.create;
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303 else
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304 error ("FileFolder.open :: path does not exist: "~path.toString);
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305 return path;
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306 }
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307 }
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308
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309
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310 /*******************************************************************************
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311
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312 Represents a group of files (need this declared here to avoid
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313 a bunch of bizarre compiler warnings)
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314
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315 *******************************************************************************/
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316
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317 class FileGroup : VfsFiles
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318 {
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319 private FilePath[] group;
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320 private VfsStats stats;
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321
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322 /***********************************************************************
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323
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324 ***********************************************************************/
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325
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326 this (FolderGroup host, VfsFilter filter)
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327 {
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328 foreach (folder; host.members)
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329 group ~= folder.files (stats, filter);
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330 }
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331
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332 /***********************************************************************
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333
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334 Iterate over the set of contained VfsFile instances
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335
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336 ***********************************************************************/
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337
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338 final int opApply (int delegate(inout VfsFile) dg)
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339 {
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340 int result;
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341 auto host = new FileHost;
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342
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343 foreach (file; group)
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344 {
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345 host.path = file;
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346 VfsFile x = host;
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347 if ((result = dg(x)) != 0)
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348 break;
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349 }
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350 return result;
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351 }
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352
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353 /***********************************************************************
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354
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355 Return the total number of entries
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356
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357 ***********************************************************************/
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358
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359 final uint files ()
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360 {
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361 return group.length;
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362 }
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363
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364 /***********************************************************************
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365
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366 Return the total size of all files
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367
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368 ***********************************************************************/
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369
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370 final ulong bytes ()
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371 {
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372 return stats.bytes;
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373 }
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374 }
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375
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376
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377 /*******************************************************************************
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378
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379 A set of folders representing a selection. This is where file
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380 selection is made, and pattern-matched folder subsets can be
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381 extracted. You need one of these to expose statistics (such as
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382 file or folder count) of a selected folder group
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383
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384 *******************************************************************************/
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385
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386 private class FolderGroup : VfsFolders
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387 {
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388 private FileFolder[] members; // folders in group
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389
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390 /***********************************************************************
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391
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392 Create a subset group
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393
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394 ***********************************************************************/
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395
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396 private this () {}
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397
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398 /***********************************************************************
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399
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400 Create a folder group including the provided folder and
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401 (optionally) all child folders
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402
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403 ***********************************************************************/
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404
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405 private this (FileFolder root, bool recurse)
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406 {
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407 members = root ~ scan (root, recurse);
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408 }
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409
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410 /***********************************************************************
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411
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412 Iterate over the set of contained VfsFolder instances
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413
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414 ***********************************************************************/
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415
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416 final int opApply (int delegate(inout VfsFolder) dg)
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417 {
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418 int result;
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419
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420 foreach (folder; members)
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421 {
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422 VfsFolder x = folder;
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423 if ((result = dg(x)) != 0)
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424 break;
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425 }
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426 return result;
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427 }
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428
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429 /***********************************************************************
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430
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431 Return the number of files in this group
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432
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433 ***********************************************************************/
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434
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435 final uint files ()
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436 {
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437 uint files;
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438 foreach (folder; members)
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439 files += folder.stats.files;
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440 return files;
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441 }
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442
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443 /***********************************************************************
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444
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445 Return the total size of all files in this group
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446
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447 ***********************************************************************/
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448
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449 final ulong bytes ()
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450 {
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451 ulong bytes;
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452
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453 foreach (folder; members)
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454 bytes += folder.stats.bytes;
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455 return bytes;
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456 }
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457
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458 /***********************************************************************
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459
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460 Return the number of folders in this group
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461
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462 ***********************************************************************/
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463
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464 final uint folders ()
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465 {
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466 return members.length;
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467 }
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468
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469 /***********************************************************************
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470
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471 Return the total number of entries in this group
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472
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473 ***********************************************************************/
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474
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475 final uint entries ()
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476 {
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477 return files + folders;
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478 }
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479
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480 /***********************************************************************
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481
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482 Return a subset of folders matching the given pattern
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483
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484 ***********************************************************************/
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485
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486 final VfsFolders subset (char[] pattern)
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487 {
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488 auto set = new FolderGroup;
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489
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490 foreach (folder; members)
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491 if (patternMatch (folder.path.name, pattern))
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492 set.members ~= folder;
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493 return set;
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494 }
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495
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496 /***********************************************************************
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497
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498 Return a set of files matching the given pattern
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499
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500 ***********************************************************************/
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501
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502 final FileGroup catalog (char[] pattern)
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503 {
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504 bool foo (VfsInfo info)
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505 {
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506 return patternMatch (info.name, pattern);
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507 }
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508
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509 return catalog (&foo);
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510 }
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511
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512 /***********************************************************************
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513
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514 Returns a set of files conforming to the given filter
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515
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516 ***********************************************************************/
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517
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518 final FileGroup catalog (VfsFilter filter = null)
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519 {
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520 return new FileGroup (this, filter);
|
|
|
521 }
|
|
|
522
|
|
|
523 /***********************************************************************
|
|
|
524
|
|
|
525 Internal routine to traverse the folder tree
|
|
|
526
|
|
|
527 ***********************************************************************/
|
|
|
528
|
|
|
529 private final FileFolder[] scan (FileFolder root, bool recurse)
|
|
|
530 {
|
|
|
531 auto folders = root.folders (recurse);
|
|
|
532 if (recurse)
|
|
|
533 foreach (child; folders)
|
|
|
534 folders ~= scan (child, recurse);
|
|
|
535 return folders;
|
|
|
536 }
|
|
|
537 }
|
|
|
538
|
|
|
539
|
|
|
540 /*******************************************************************************
|
|
|
541
|
|
|
542 A host for folders, currently used to harbor create() and open()
|
|
|
543 methods only
|
|
|
544
|
|
|
545 *******************************************************************************/
|
|
|
546
|
|
|
547 private class FolderHost : VfsFolderEntry
|
|
|
548 {
|
|
|
549 private char[] path;
|
|
|
550 private FileFolder parent;
|
|
|
551
|
|
|
552 /***********************************************************************
|
|
|
553
|
|
|
554 ***********************************************************************/
|
|
|
555
|
|
|
556 private this (FileFolder parent, char[] path)
|
|
|
557 {
|
|
|
558 this.path = path;
|
|
|
559 this.parent = parent;
|
|
|
560 }
|
|
|
561
|
|
|
562 /***********************************************************************
|
|
|
563
|
|
|
564 ***********************************************************************/
|
|
|
565
|
|
|
566 final VfsFolder create ()
|
|
|
567 {
|
|
|
568 return new FileFolder (parent, path, true);
|
|
|
569 }
|
|
|
570
|
|
|
571 /***********************************************************************
|
|
|
572
|
|
|
573 ***********************************************************************/
|
|
|
574
|
|
|
575 final VfsFolder open ()
|
|
|
576 {
|
|
|
577 return new FileFolder (parent, path, false);
|
|
|
578 }
|
|
|
579
|
|
|
580 /***********************************************************************
|
|
|
581
|
|
|
582 Test to see if a folder exists
|
|
|
583
|
|
|
584 ***********************************************************************/
|
|
|
585
|
|
|
586 bool exists ()
|
|
|
587 {
|
|
|
588 try {
|
|
|
589 open();
|
|
|
590 return true;
|
|
|
591 } catch (IOException x) {}
|
|
|
592 return false;
|
|
|
593 }
|
|
|
594 }
|
|
|
595
|
|
|
596
|
|
|
597 /*******************************************************************************
|
|
|
598
|
|
|
599 Represents things you can do with a file
|
|
|
600
|
|
|
601 *******************************************************************************/
|
|
|
602
|
|
|
603 private class FileHost : VfsFile
|
|
|
604 {
|
|
|
605 private FilePath path;
|
|
|
606
|
|
|
607 /***********************************************************************
|
|
|
608
|
|
|
609 ***********************************************************************/
|
|
|
610
|
|
|
611 private this (char[] path = null)
|
|
|
612 {
|
|
|
613 this.path = FilePath (path);
|
|
|
614 }
|
|
|
615
|
|
|
616 /***********************************************************************
|
|
|
617
|
|
|
618 Return a short name
|
|
|
619
|
|
|
620 ***********************************************************************/
|
|
|
621
|
|
|
622 final char[] name()
|
|
|
623 {
|
|
|
624 return path.file;
|
|
|
625 }
|
|
|
626
|
|
|
627 /***********************************************************************
|
|
|
628
|
|
|
629 Return a long name
|
|
|
630
|
|
|
631 ***********************************************************************/
|
|
|
632
|
|
|
633 final char[] toString ()
|
|
|
634 {
|
|
|
635 return path.toString;
|
|
|
636 }
|
|
|
637
|
|
|
638 /***********************************************************************
|
|
|
639
|
|
|
640 Does this file exist?
|
|
|
641
|
|
|
642 ***********************************************************************/
|
|
|
643
|
|
|
644 final bool exists()
|
|
|
645 {
|
|
|
646 return path.exists;
|
|
|
647 }
|
|
|
648
|
|
|
649 /***********************************************************************
|
|
|
650
|
|
|
651 Return the file size
|
|
|
652
|
|
|
653 ***********************************************************************/
|
|
|
654
|
|
|
655 final ulong size()
|
|
|
656 {
|
|
|
657 return path.fileSize;
|
|
|
658 }
|
|
|
659
|
|
|
660 /***********************************************************************
|
|
|
661
|
|
|
662 Create a new file instance
|
|
|
663
|
|
|
664 ***********************************************************************/
|
|
|
665
|
|
|
666 final VfsFile create ()
|
|
|
667 {
|
|
|
668 path.createFile ();
|
|
|
669 return this;
|
|
|
670 }
|
|
|
671
|
|
|
672 /***********************************************************************
|
|
|
673
|
|
|
674 Create a new file instance and populate with stream
|
|
|
675
|
|
|
676 ***********************************************************************/
|
|
|
677
|
|
|
678 final VfsFile create (InputStream input)
|
|
|
679 {
|
|
|
680 create.output.copy(input).close;
|
|
|
681 return this;
|
|
|
682 }
|
|
|
683
|
|
|
684 /***********************************************************************
|
|
|
685
|
|
|
686 Create and copy the given source
|
|
|
687
|
|
|
688 ***********************************************************************/
|
|
|
689
|
|
|
690 VfsFile copy (VfsFile source)
|
|
|
691 {
|
|
|
692 auto input = source.input;
|
|
|
693 scope (exit) input.close;
|
|
|
694 return create (input);
|
|
|
695 }
|
|
|
696
|
|
|
697 /***********************************************************************
|
|
|
698
|
|
|
699 Create and copy the given source, and remove the source
|
|
|
700
|
|
|
701 ***********************************************************************/
|
|
|
702
|
|
|
703 final VfsFile move (VfsFile source)
|
|
|
704 {
|
|
|
705 copy (source);
|
|
|
706 source.remove;
|
|
|
707 return this;
|
|
|
708 }
|
|
|
709
|
|
|
710 /***********************************************************************
|
|
|
711
|
|
|
712 Return the input stream. Don't forget to close it
|
|
|
713
|
|
|
714 ***********************************************************************/
|
|
|
715
|
|
|
716 final InputStream input ()
|
|
|
717 {
|
|
|
718 return new FileConduit (path.dup);
|
|
|
719 }
|
|
|
720
|
|
|
721 /***********************************************************************
|
|
|
722
|
|
|
723 Return the output stream. Don't forget to close it
|
|
|
724
|
|
|
725 ***********************************************************************/
|
|
|
726
|
|
|
727 final OutputStream output ()
|
|
|
728 {
|
|
|
729 return new FileConduit (path.dup, FileConduit.WriteExisting);
|
|
|
730 }
|
|
|
731
|
|
|
732 /***********************************************************************
|
|
|
733
|
|
|
734 Remove this file
|
|
|
735
|
|
|
736 ***********************************************************************/
|
|
|
737
|
|
|
738 final VfsFile remove ()
|
|
|
739 {
|
|
|
740 path.remove;
|
|
|
741 return this;
|
|
|
742 }
|
|
|
743
|
|
|
744 /***********************************************************************
|
|
|
745
|
|
|
746 Duplicate this entry
|
|
|
747
|
|
|
748 ***********************************************************************/
|
|
|
749
|
|
|
750 final VfsFile dup()
|
|
|
751 {
|
|
|
752 return new FileHost (path.toString);
|
|
|
753 }
|
|
|
754
|
|
|
755 /***********************************************************************
|
|
|
756
|
|
|
757 ***********************************************************************/
|
|
|
758
|
|
|
759 private VfsFile set (char[] folder, char[] name)
|
|
|
760 {
|
|
|
761 path.set(folder).append(name);
|
|
|
762 return this;
|
|
|
763 }
|
|
|
764 }
|
|
|
765
|
|
|
766
|
|
|
767 debug (FileFolder)
|
|
|
768 {
|
|
|
769
|
|
|
770 /*******************************************************************************
|
|
|
771
|
|
|
772 *******************************************************************************/
|
|
|
773
|
|
|
774 import tango.io.Stdout;
|
|
|
775 import tango.io.Buffer;
|
|
|
776
|
|
|
777 void main()
|
|
|
778 {
|
|
|
779 auto root = new FileFolder ("d:/d/import/temp", true);
|
|
|
780 root.folder("test").create;
|
|
|
781 root.file("test.txt").create(new Buffer("hello"));
|
|
|
782 Stdout.formatln ("test.txt.length = {}", root.file("test.txt").size);
|
|
|
783
|
|
|
784 root = new FileFolder ("c:/");
|
|
|
785
|
|
|
786 auto set = root.self;
|
|
|
787
|
|
|
788 Stdout.formatln ("self.files = {}", set.files);
|
|
|
789 Stdout.formatln ("self.bytes = {}", set.bytes);
|
|
|
790 Stdout.formatln ("self.folders = {}", set.folders);
|
|
|
791 Stdout.formatln ("self.entries = {}", set.entries);
|
|
|
792
|
|
|
793 set = root.tree;
|
|
|
794 Stdout.formatln ("tree.files = {}", set.files);
|
|
|
795 Stdout.formatln ("tree.bytes = {}", set.bytes);
|
|
|
796 Stdout.formatln ("tree.folders = {}", set.folders);
|
|
|
797 Stdout.formatln ("tree.entries = {}", set.entries);
|
|
|
798
|
|
|
799 //foreach (folder; set)
|
|
|
800 // Stdout.formatln ("tree.folder '{}' has {} files", folder.name, folder.self.files);
|
|
|
801
|
|
|
802 auto cat = set.catalog ("s*");
|
|
|
803 Stdout.formatln ("cat.files = {}", cat.files);
|
|
|
804 Stdout.formatln ("cat.bytes = {}", cat.bytes);
|
|
|
805 //foreach (file; cat)
|
|
|
806 // Stdout.formatln ("cat.name '{}' '{}'", file.name, file.toString);
|
|
|
807 }
|
|
|
808 }
|
