Mercurial > gemma
annotate pkg/imports/wp.go @ 2079:9318973487a1
Waterway profiles import: Implemented the parsing of the data lines of the CSV file and stored the values into the database.
author | Sascha L. Teichmann <sascha.teichmann@intevation.de> |
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date | Wed, 30 Jan 2019 23:57:51 +0100 |
parents | dacf79a0658e |
children | ddbac0f22ffb |
rev | line source |
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1 // This is Free Software under GNU Affero General Public License v >= 3.0 |
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2 // without warranty, see README.md and license for details. |
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3 // |
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4 // SPDX-License-Identifier: AGPL-3.0-or-later |
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5 // License-Filename: LICENSES/AGPL-3.0.txt |
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6 // |
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7 // Copyright (C) 2018 by via donau |
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8 // – Österreichische Wasserstraßen-Gesellschaft mbH |
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9 // Software engineering by Intevation GmbH |
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10 // |
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11 // Author(s): |
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12 // * Sascha L. Teichmann <sascha.teichmann@intevation.de> |
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13 |
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14 package imports |
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15 |
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16 import ( |
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17 "bufio" |
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18 "context" |
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19 "database/sql" |
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20 "encoding/csv" |
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21 "fmt" |
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22 "io" |
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23 "os" |
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24 "path/filepath" |
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25 "strconv" |
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26 "strings" |
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27 "time" |
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28 |
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29 "gemma.intevation.de/gemma/pkg/common" |
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30 "gemma.intevation.de/gemma/pkg/misc" |
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31 "gemma.intevation.de/gemma/pkg/models" |
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32 "github.com/jackc/pgx/pgtype" |
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33 ) |
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34 |
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35 type WaterwayProfiles struct { |
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36 Dir string `json:"dir"` |
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37 } |
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38 |
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39 const WPJobKind JobKind = "wp" |
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40 |
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41 type wpJobCreator struct{} |
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42 |
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43 func init() { |
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44 RegisterJobCreator(WPJobKind, wpJobCreator{}) |
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45 } |
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46 |
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47 func (wpJobCreator) Create(_ JobKind, data string) (Job, error) { |
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48 wp := new(WaterwayProfiles) |
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49 if err := common.FromJSONString(data, wp); err != nil { |
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50 return nil, err |
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51 } |
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52 return wp, nil |
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53 } |
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54 |
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55 func (wpJobCreator) AutoAccept() bool { return false } |
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56 |
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57 func (wpJobCreator) Description() string { |
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58 return "waterway profiles" |
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59 } |
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60 |
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61 func (wpJobCreator) Depends() []string { |
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62 return []string{ |
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63 "waterway_profiles", |
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64 } |
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65 } |
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66 |
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67 const ( |
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68 insertWaterwayProfileSQL = ` |
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69 INSERT INTO waterway.waterway_profiles ( |
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70 location, |
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71 validity, |
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72 lnwl, |
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73 mwl, |
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74 hnwl, |
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75 fe30, |
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76 fe100, |
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77 date_info, |
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78 source_organization |
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79 ) VALUES ( |
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80 ($1, $2, $3, $4, $5), |
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81 $6, |
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82 $7, |
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83 $8, |
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84 $9, |
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85 $10, |
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86 $11, |
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87 $12, |
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88 $13 |
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89 ) RETURNING id` |
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90 |
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91 wpStageDoneSQL = ` |
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92 UPDATE waterway.waterway_profiles SET staging_done = true |
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93 WHERE id IN ( |
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94 SELECT key FROM import.track_imports |
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95 WHERE import_id = $1 AND |
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96 relation = 'waterway.waterway_profiles'::regclass)` |
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97 ) |
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98 |
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99 func (wpJobCreator) StageDone( |
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100 ctx context.Context, |
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101 tx *sql.Tx, |
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102 id int64, |
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103 ) error { |
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104 _, err := tx.ExecContext(ctx, wpStageDoneSQL, id) |
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105 return err |
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106 } |
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107 |
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108 func (wp *WaterwayProfiles) CleanUp() error { |
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109 return os.RemoveAll(wp.Dir) |
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110 } |
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111 |
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112 func parseFloat64(s string) (sql.NullFloat64, error) { |
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113 if s == "" { |
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114 return sql.NullFloat64{}, nil |
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115 } |
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116 s = strings.Replace(s, ",", ".", -1) |
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117 v, err := strconv.ParseFloat(s, 64) |
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118 if err != nil { |
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119 return sql.NullFloat64{}, err |
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120 } |
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121 return sql.NullFloat64{Float64: v, Valid: true}, nil |
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122 } |
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123 |
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124 func (wp *WaterwayProfiles) Do( |
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125 ctx context.Context, |
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126 importID int64, |
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127 conn *sql.Conn, |
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128 feedback Feedback, |
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129 ) (interface{}, error) { |
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130 |
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131 start := time.Now() |
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132 |
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133 f, err := os.Open(filepath.Join(wp.Dir, "wp.csv")) |
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134 if err != nil { |
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135 return nil, err |
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136 } |
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137 defer f.Close() |
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138 |
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139 r := csv.NewReader(bufio.NewReader(f)) |
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140 r.Comma = ';' |
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141 r.ReuseRecord = true |
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142 |
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143 headers, err := r.Read() |
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144 if err != nil { |
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145 return nil, err |
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146 } |
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147 |
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148 var ( |
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149 locationIdx = -1 |
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150 validFromIdx = -1 |
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151 validToIdx = -1 |
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152 lnwlIdx = -1 |
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153 mwlIdx = -1 |
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154 hnwlIdx = -1 |
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155 fe30Idx = -1 |
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156 fe100Idx = -1 |
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157 dateInfoIdx = -1 |
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158 sourceIdx = -1 |
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159 ) |
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160 |
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161 type headerField struct { |
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162 idx *int |
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163 substr string |
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164 } |
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165 |
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166 fields := []headerField{ |
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167 {&locationIdx, "location"}, |
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168 {&validFromIdx, "valid_from"}, |
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169 {&validToIdx, "valid_to"}, |
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170 {&lnwlIdx, "lnwl"}, |
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171 {&mwlIdx, "mwl"}, |
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172 {&hnwlIdx, "hnwl"}, |
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173 {&fe30Idx, "fe30"}, |
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174 {&fe100Idx, "fe100"}, |
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175 {&dateInfoIdx, "date_info"}, |
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176 {&sourceIdx, "source"}, |
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177 } |
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178 |
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179 nextHeader: |
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180 for i, h := range headers { |
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181 h = strings.ToLower(h) |
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182 for j := range fields { |
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183 if strings.Contains(h, fields[j].substr) { |
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184 if *fields[j].idx != -1 { |
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185 return nil, fmt.Errorf( |
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186 "CSV has more than one column with name containing '%s'", |
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187 fields[j].substr) |
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188 } |
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189 *fields[j].idx = i |
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190 continue nextHeader |
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191 } |
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192 } |
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193 } |
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194 |
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195 var missing []string |
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196 for i := range fields { |
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197 if *fields[i].idx == -1 { |
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198 missing = append(missing, fields[i].substr) |
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199 } |
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200 } |
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201 if len(missing) > 0 { |
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202 return nil, fmt.Errorf( |
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203 "CSV is missing columns: %s", |
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204 strings.Join(missing, ", ")) |
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205 } |
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206 |
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207 parseDate := misc.TimeGuesser([]string{"02.01.2006"}).Guess |
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208 |
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209 tx, err := conn.BeginTx(ctx, nil) |
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210 if err != nil { |
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211 return nil, err |
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212 } |
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213 defer tx.Rollback() |
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214 |
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215 insertStmt, err := tx.PrepareContext(ctx, insertWaterwayProfileSQL) |
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216 if err != nil { |
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217 return nil, err |
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218 } |
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219 defer insertStmt.Close() |
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220 |
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221 trackStmt, err := tx.PrepareContext(ctx, trackImportSQL) |
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222 if err != nil { |
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223 return nil, err |
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224 } |
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225 defer trackStmt.Close() |
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226 |
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227 var ids []int64 |
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228 |
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229 lines: |
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230 for line := 1; ; line++ { |
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231 |
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232 row, err := r.Read() |
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233 switch { |
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234 case err == io.EOF || len(row) == 0: |
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235 break lines |
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236 case err != nil: |
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237 return nil, fmt.Errorf("CSV parsing failed: %v", err) |
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238 } |
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239 |
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240 location, err := models.IsrsFromString(row[locationIdx]) |
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241 if err != nil { |
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242 return nil, fmt.Errorf( |
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243 "Invalid ISRS location code in line %d: %v", |
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244 line, err) |
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245 } |
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246 |
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247 validFromTime, err := parseDate(row[validFromIdx]) |
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248 if err != nil { |
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249 return nil, fmt.Errorf( |
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250 "Invalid 'valid_from' value in line %d: %v", |
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251 line, err) |
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252 } |
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253 validToTime, err := parseDate(row[validToIdx]) |
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254 if err != nil { |
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255 return nil, fmt.Errorf( |
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256 "Invalid 'valid_to' value in line %d: %v", |
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257 line, err) |
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258 } |
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259 |
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260 validFrom := pgtype.Timestamptz{ |
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261 Time: validFromTime, |
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262 Status: pgtype.Present, |
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263 } |
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264 |
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265 validTo := pgtype.Timestamptz{ |
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266 Time: validToTime, |
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267 Status: pgtype.Present, |
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268 } |
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269 |
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270 validity := pgtype.Tstzrange{ |
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271 Lower: validFrom, |
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272 Upper: validTo, |
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273 LowerType: pgtype.Inclusive, |
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274 UpperType: pgtype.Exclusive, |
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275 Status: pgtype.Present, |
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276 } |
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277 |
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278 lnwl, err := parseFloat64(row[lnwlIdx]) |
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279 if err != nil { |
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280 return nil, fmt.Errorf( |
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281 "Invalid 'lnwl' value in line %d: %v", |
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282 line, err) |
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283 } |
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284 mwl, err := parseFloat64(row[mwlIdx]) |
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285 if err != nil { |
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286 return nil, fmt.Errorf( |
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287 "Invalid 'mwl' value in line %d: %v", |
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288 line, err) |
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289 } |
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290 hnwl, err := parseFloat64(row[hnwlIdx]) |
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291 if err != nil { |
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292 return nil, fmt.Errorf( |
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293 "Invalid 'hnwl' value in line %d: %v", |
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294 line, err) |
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295 } |
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296 fe30, err := parseFloat64(row[fe30Idx]) |
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297 if err != nil { |
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298 return nil, fmt.Errorf( |
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299 "Invalid 'fe30' value in line %d: %v", |
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300 line, err) |
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301 } |
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302 fe100, err := parseFloat64(row[fe100Idx]) |
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303 if err != nil { |
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304 return nil, fmt.Errorf( |
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305 "Invalid 'fe100' value in line %d: %v", |
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306 line, err) |
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307 } |
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308 |
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309 var dateInfo time.Time |
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310 |
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311 if di := row[dateInfoIdx]; di == "" { |
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312 dateInfo = start |
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313 } else if dateInfo, err = parseDate(di); err != nil { |
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314 return nil, fmt.Errorf( |
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315 "Invalid 'date_info' value in line %d: %v", |
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316 line, err) |
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317 } |
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318 |
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319 source := row[sourceIdx] |
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320 |
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321 var id int64 |
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322 if err := insertStmt.QueryRowContext( |
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323 ctx, |
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324 location.CountryCode, |
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325 location.LoCode, |
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326 location.FairwaySection, |
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327 location.Orc, |
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328 location.Hectometre, |
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329 &validity, |
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330 lnwl, |
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331 mwl, |
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332 hnwl, |
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333 fe30, |
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334 fe100, |
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335 dateInfo, |
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336 source, |
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337 ).Scan(&id); err != nil { |
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338 return nil, err |
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339 } |
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340 |
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341 if _, err := trackStmt.ExecContext( |
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342 ctx, importID, "waterway.waterway_profiles", id); err != nil { |
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343 return nil, err |
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344 } |
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345 ids = append(ids, id) |
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346 } |
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347 if len(ids) == 0 { |
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348 return nil, UnchangedError("No new entries in waterway profiles.") |
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349 } |
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350 |
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351 if err := tx.Commit(); err != nil { |
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352 return nil, fmt.Errorf( |
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353 "Importing waterway profiles failed after %s: %v", |
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354 time.Since(start), err) |
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355 } |
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356 |
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357 feedback.Info("%d new entries in waterway profiles.", len(ids)) |
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358 feedback.Info("Importing waterway profiles took %s", |
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359 time.Since(start)) |
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360 |
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361 summary := struct { |
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362 IDs []int64 `json:"ids"` |
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363 }{ |
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364 IDs: ids, |
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365 } |
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366 return &summary, nil |
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367 } |