1 | import au.com.bytecode.opencsv.CSVWriter |
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2 | import au.com.bytecode.opencsv.CSVReader |
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3 | |
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4 | /** |
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5 | * Provides some csv import/export methods. |
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6 | * Requires the opencsv jar to be available which is included in the grails-export plugin. |
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7 | */ |
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8 | class CsvService { |
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9 | |
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10 | boolean transactional = false |
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11 | |
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12 | /** |
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13 | * Import an asset tree creating items as required. |
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14 | * @param request The http request to run getFile against. |
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15 | * Get file should return a csv format file containing the asset tree as per template. |
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16 | */ |
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17 | def importAssetTree(request) { |
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18 | Asset.withTransaction { status -> |
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19 | def result = [:] |
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20 | |
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21 | def kByteMultiplier = 1000 |
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22 | def fileMaxSize = 500 * kByteMultiplier |
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23 | |
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24 | def multiPartFile = request.getFile('file') |
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25 | |
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26 | InputStreamReader sr = new InputStreamReader(multiPartFile.inputStream) |
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27 | CSVReader reader = new CSVReader(sr) |
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28 | |
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29 | def fail = { Map m -> |
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30 | status.setRollbackOnly() |
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31 | reader.close() |
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32 | result.error = [ code: m.code, args: m.args ] |
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33 | return result |
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34 | } |
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35 | |
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36 | if(!multiPartFile || multiPartFile.isEmpty()) |
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37 | return fail(code: "asset.tree.import.file.not.supplied") |
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38 | |
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39 | if (multiPartFile.getSize() > fileMaxSize) |
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40 | return fail(code: "asset.tree.import.file.over.max.size", args: [fileMaxSize/kByteMultiplier, "kB"]) |
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41 | |
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42 | def columnIndex = 0 |
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43 | def numberOfColumns = 0 |
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44 | def maxNumberOfColumns = 20 |
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45 | |
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46 | // Get first line. |
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47 | def line = reader.readNext() |
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48 | def lineNumber = 1 |
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49 | |
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50 | // Check for header line 1. |
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51 | if(line != templateHeaderLine1) { |
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52 | log.error "Failed to find header line 1. " |
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53 | log.error "Required: " + templateHeaderLine1.toString() |
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54 | log.error "Supplied: " + line.toString() |
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55 | return fail(code: "asset.tree.import.no.header") |
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56 | } |
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57 | |
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58 | // Get second line. |
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59 | line = reader.readNext() |
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60 | lineNumber ++ |
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61 | |
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62 | // Check for header line 2. |
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63 | if(line != templateHeaderLine2) { |
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64 | log.error "Failed to find header line 2. " |
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65 | log.error "Required: " + templateHeaderLine2.toString() |
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66 | log.error "Supplied: " + line.toString() |
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67 | return fail(code: "asset.tree.import.no.header") |
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68 | } |
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69 | |
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70 | log.info "Import checks passed, start processing asset file." |
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71 | |
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72 | // Prepare the first body line. |
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73 | line = reader.readNext() |
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74 | lineNumber ++ |
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75 | |
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76 | def siteInstance |
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77 | def departmentInstance |
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78 | def sectionInstance |
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79 | def assetInstance |
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80 | def assetSubItemInstance |
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81 | def parentItem |
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82 | |
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83 | def column = [:] |
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84 | |
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85 | def nextLine = { |
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86 | line = reader.readNext() |
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87 | lineNumber ++ |
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88 | log.info "Processing line: " + lineNumber |
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89 | } |
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90 | |
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91 | def nextColumn = { |
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92 | if( (columnIndex+2) > numberOfColumns ) { |
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93 | log.info "No more columns on line: " + lineNumber |
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94 | return false |
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95 | |
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96 | } |
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97 | if(!line[columnIndex]) { |
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98 | log.info "No name at " + "line: " + lineNumber + " col: " + columnIndex |
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99 | return false |
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100 | } |
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101 | column.name = line[columnIndex] |
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102 | column.description = line[++columnIndex] |
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103 | columnIndex++ |
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104 | // Success. |
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105 | return column |
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106 | } |
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107 | |
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108 | while(line) { |
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109 | numberOfColumns = Math.min( line.size(), maxNumberOfColumns ) |
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110 | columnIndex = 0 |
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111 | |
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112 | if(!nextColumn()) { |
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113 | nextLine() |
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114 | continue |
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115 | } |
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116 | |
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117 | // Ignore comment lines. |
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118 | if( column.name.startsWith("Comment") ) { |
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119 | log.info "Comment line found." |
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120 | nextLine() |
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121 | continue |
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122 | } |
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123 | |
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124 | // Ignore example lines. |
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125 | if( column.name.startsWith("Example") ) { |
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126 | log.info "Example line found." |
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127 | nextLine() |
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128 | continue |
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129 | } |
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130 | |
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131 | siteInstance = Site.findByName(column.name) |
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132 | if(!siteInstance) { |
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133 | log.info "Creating site: " + column.name |
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134 | siteInstance = new Site(name: column.name, |
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135 | description: column.description) |
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136 | if(!siteInstance.save()) { |
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137 | log.error "Failed to create site on line: " + column.name + "(" + lineNumber + ")" |
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138 | return fail(code: "asset.tree.import.failure", args: [lineNumber]) |
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139 | } |
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140 | } |
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141 | else log.info "Existing site: " + siteInstance |
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142 | |
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143 | if(!nextColumn()) { |
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144 | nextLine() |
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145 | continue |
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146 | } |
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147 | |
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148 | departmentInstance = Department.findByName(column.name) |
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149 | if(!departmentInstance) { |
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150 | log.info "Creating department: " + column.name |
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151 | departmentInstance = new Department(name: column.name, |
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152 | description: column.description, |
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153 | site: siteInstance) |
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154 | if(!departmentInstance.save()) { |
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155 | log.error "Failed to create department on line: " + column.name + "(" + lineNumber + ")" |
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156 | return fail(code: "asset.tree.import.failure", args: [lineNumber]) |
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157 | } |
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158 | } |
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159 | else log.info "Existing department: " + departmentInstance |
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160 | |
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161 | if(!nextColumn()) { |
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162 | nextLine() |
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163 | continue |
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164 | } |
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165 | |
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166 | sectionInstance = Section.findByName(column.name) |
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167 | if(!sectionInstance) { |
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168 | log.info "Creating section: " + column.name |
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169 | sectionInstance = new Section(name: column.name, |
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170 | description: column.description, |
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171 | site: siteInstance, |
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172 | department: departmentInstance) |
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173 | if(!sectionInstance.save()) { |
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174 | log.error "Failed to create section on line: " + column.name + "(" + lineNumber + ")" |
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175 | return fail(code: "asset.tree.import.failure", args: [lineNumber]) |
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176 | } |
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177 | } |
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178 | else log.info "Existing section: " + sectionInstance |
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179 | |
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180 | if(!nextColumn()) { |
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181 | nextLine() |
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182 | continue |
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183 | } |
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184 | |
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185 | assetInstance = Asset.findByName(column.name) |
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186 | if(!assetInstance) { |
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187 | log.info "Creating asset: " + column.name |
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188 | assetInstance = new Asset(name: column.name, |
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189 | description: column.description, |
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190 | section: sectionInstance) |
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191 | if(!assetInstance.save()) { |
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192 | log.error "Failed to create asset on line: " + column.name + "(" + lineNumber + ")" |
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193 | return fail(code: "asset.tree.import.failure", args: [lineNumber]) |
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194 | } |
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195 | } |
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196 | else log.info "Existing asset: " + assetInstance |
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197 | |
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198 | if(!nextColumn()) { |
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199 | nextLine() |
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200 | continue |
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201 | } |
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202 | |
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203 | assetSubItemInstance = AssetSubItem.findByName(column.name) |
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204 | if(!assetSubItemInstance) { |
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205 | log.info "Creating asset sub item: " + column.name |
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206 | assetSubItemInstance = new AssetSubItem(name: column.name, |
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207 | description: column.description) |
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208 | if(!assetInstance.save()) { |
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209 | log.error "Failed to create assetSubItem on line: " + column.name + "(" + lineNumber + ")" |
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210 | return fail(code: "asset.tree.import.failure", args: [lineNumber]) |
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211 | } |
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212 | } |
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213 | else log.info "Existing asset sub item: " + assetSubItemInstance |
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214 | |
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215 | assetInstance.addToAssetSubItems(assetSubItemInstance) |
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216 | |
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217 | while( nextColumn() ) { |
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218 | |
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219 | parentItem = assetSubItemInstance |
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220 | assetSubItemInstance = AssetSubItem.findByName(column.name) |
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221 | if(!assetSubItemInstance) { |
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222 | log.info "Creating asset sub item: " + column.name |
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223 | assetSubItemInstance = new AssetSubItem(name: column.name, |
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224 | description: column.description, |
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225 | parentItem: parentItem) |
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226 | if(!assetSubItemInstance.save()) { |
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227 | log.error "Failed to create assetSubItem on line: " + column.name + "(" + lineNumber + ")" |
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228 | return fail(code: "asset.tree.import.failure", args: [lineNumber]) |
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229 | } |
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230 | } |
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231 | else log.info "Existing asset sub item: " + assetSubItemInstance |
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232 | |
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233 | } // while( nextColumn() ) |
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234 | |
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235 | nextLine() |
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236 | } //while(line) |
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237 | |
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238 | // Success. |
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239 | log.info "End of file." |
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240 | reader.close() |
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241 | return result |
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242 | |
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243 | } //end withTransaction |
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244 | } // end importAssetTree() |
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245 | |
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246 | /** |
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247 | * Build an asset tree template csv file. |
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248 | * This template can then be populated for import. |
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249 | * @returns The template as a String in csv format. |
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250 | */ |
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251 | def buildAssetTreeTemplate() { |
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252 | |
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253 | StringWriter sw = new StringWriter() |
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254 | CSVWriter writer = new CSVWriter(sw) |
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255 | |
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256 | writeTemplateLines(writer) |
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257 | |
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258 | writer.close() |
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259 | return sw.toString() |
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260 | } |
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261 | |
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262 | private writeTemplateLines(writer) { |
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263 | writer.writeNext(templateHeaderLine1 as String[]) |
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264 | writer.writeNext(templateHeaderLine2 as String[]) |
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265 | writer.writeNext() |
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266 | writer.writeNext(["Example: Site1", "", "Department 1", "", "Section 1", "", "Asset 1", ""] as String[]) |
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267 | writer.writeNext() |
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268 | writer.writeNext(["Example: Site1", "", "Department 1", "", "Section 1", "", "Asset 2", ""] as String[]) |
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269 | writer.writeNext() |
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270 | writer.writeNext("Comment: the first two header lines are required.") |
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271 | writer.writeNext("Comment: leave a blank line between assets.") |
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272 | writer.writeNext("Comment: names are required, descriptions are optional.") |
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273 | writer.writeNext("Comment: identical names in each column will be considered as the same item.") |
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274 | writer.writeNext("Comment: any line starting with 'Comment' will be ignored.") |
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275 | writer.writeNext("Comment: any line starting with 'Example' will be ignored.") |
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276 | writer.writeNext("Comment: example and comment lines may be deleted.") |
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277 | writer.writeNext() |
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278 | } |
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279 | |
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280 | /** |
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281 | * Build an asset tree test file. |
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282 | * This test file can be imported to test the import and template methods. |
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283 | * @returns The test file as a String in csv format. |
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284 | */ |
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285 | def buildAssetTreeTest() { |
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286 | |
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287 | StringWriter sw = new StringWriter() |
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288 | CSVWriter writer = new CSVWriter(sw) |
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289 | |
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290 | writeTemplateLines(writer) |
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291 | |
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292 | writer.writeNext(["Lake Press", "Lake Press Site", |
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293 | "Print Department", "The printing department", |
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294 | "Press Section", "Contains all printing units", |
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295 | "Print Unit 1", "Printing Unit Number 1", |
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296 | "Print Unit", "Print Unit (Common to all units)", |
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297 | "Print Couple", "Includes blanket cylinder", |
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298 | "Motor", "Main Drive Motor", |
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299 | "NDS Bearing", "Non Drive Side Main Bearing" |
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300 | ] as String[]) |
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301 | |
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302 | writer.writeNext(["Lake Press", "Lake Press Site", |
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303 | "Print Department", "The printing department", |
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304 | "Press Section", "Contains all printing units", |
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305 | "Print Unit 1", "Printing Unit Number 1", |
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306 | "Print Unit", "Print Unit (Common to all units)", |
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307 | "Print Couple", "Includes blanket cylinder", |
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308 | "Motor", "Main Drive Motor", |
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309 | "DS Bearing", "Drive Side Main Bearing" |
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310 | ] as String[]) |
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311 | |
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312 | writer.close() |
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313 | return sw.toString() |
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314 | } |
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315 | |
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316 | /** |
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317 | * Build complete asset trees for export. |
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318 | * @param assetList The list of assets to build and export trees for. |
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319 | * @returns The tree as a String in csv format. |
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320 | */ |
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321 | def buildAssetTree(List assetList) { |
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322 | |
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323 | StringWriter sw = new StringWriter() |
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324 | CSVWriter writer = new CSVWriter(sw) |
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325 | |
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326 | //Header |
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327 | writer.writeNext(templateHeaderLine1 as String[]) |
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328 | writer.writeNext(templateHeaderLine2 as String[]) |
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329 | |
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330 | //Rows |
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331 | def row |
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332 | |
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333 | def writeAssetSubItem4 = { assetSubItem -> |
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334 | row.add(assetSubItem) |
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335 | writer.writeNext(row as String[]) |
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336 | } |
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337 | |
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338 | def writeAssetSubItem3 = { assetSubItem -> |
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339 | row.add(assetSubItem) |
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340 | |
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341 | if(assetSubItem.subItems.size() > 0) { |
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342 | assetSubItem.subItems.sort { p1, p2 -> p1.name.compareToIgnoreCase(p2.name) }.each() { assetSubItem4 -> |
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343 | writeAssetSubItem4(assetSubItem4) |
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344 | row.remove(row.last()) |
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345 | } |
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346 | } |
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347 | else { |
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348 | writer.writeNext(row as String[]) |
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349 | } |
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350 | |
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351 | } |
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352 | |
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353 | def writeAssetSubItem2 = { assetSubItem -> |
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354 | row.add(assetSubItem) |
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355 | |
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356 | if(assetSubItem.subItems.size() > 0) { |
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357 | assetSubItem.subItems.sort { p1, p2 -> p1.name.compareToIgnoreCase(p2.name) }.each() { assetSubItem3 -> |
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358 | writeAssetSubItem3(assetSubItem3) |
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359 | row.remove(row.last()) |
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360 | } |
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361 | } |
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362 | else { |
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363 | writer.writeNext(row as String[]) |
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364 | } |
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365 | |
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366 | } |
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367 | |
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368 | def writeAssetSubItem1 = { assetSubItem -> |
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369 | row.add(assetSubItem) |
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370 | |
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371 | if(assetSubItem.subItems.size() > 0) { |
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372 | assetSubItem.subItems.sort { p1, p2 -> p1.name.compareToIgnoreCase(p2.name) }.each() { assetSubItem2 -> |
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373 | writeAssetSubItem2(assetSubItem2) |
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374 | row.remove(row.last()) |
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375 | } |
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376 | } |
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377 | else { |
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378 | writer.writeNext(row as String[]) |
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379 | } |
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380 | |
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381 | } |
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382 | |
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383 | assetList.sort { p1, p2 -> p1.name.compareToIgnoreCase(p2.name) }.each() { asset -> |
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384 | row = [] |
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385 | writer.writeNext(row as String[]) //blank row between assets. |
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386 | row.add(asset.section.site) |
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387 | row.add(asset.section) |
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388 | row.add(asset.name) |
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389 | |
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390 | if(asset.assetSubItems.size() > 0) { |
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391 | asset.assetSubItems.each() { assetSubItem1 -> |
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392 | writeAssetSubItem1(assetSubItem1) |
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393 | row.remove(row.last()) |
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394 | } |
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395 | } |
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396 | else { |
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397 | writer.writeNext(row as String[]) |
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398 | } |
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399 | |
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400 | } |
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401 | |
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402 | writer.close() |
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403 | return sw.toString() |
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404 | } // end buildAssetTree |
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405 | |
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406 | private getTemplateHeaderLine1() { |
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407 | ["Site", "", "Department", "", "Section", "","Asset", "", "Sub Asset", "", "Functional Assembly", "", "Sub Assembly Group", "", "SubItem", ""] |
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408 | } |
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409 | |
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410 | private getTemplateHeaderLine2() { |
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411 | (["Name", "Description"])*8 |
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412 | } |
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413 | |
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414 | } // end class |
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