Mercurial > gemma

annotate pkg/controllers/fwa.go @ 5197:c352dbbf2778 new-fwa

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Started with loading limiting factors and validities.
author Sascha L. Teichmann <sascha.teichmann@intevation.de>
date Thu, 07 May 2020 17:50:29 +0200
parents 5bc8daa986d9
children 5001582f2ee1
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
5184
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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, 2019, 2020 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 controllers
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15
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16 import (
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17 "context"
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18 "database/sql"
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19 "log"
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20 "net/http"
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21 "time"
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22
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23 "github.com/gorilla/mux"
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24
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25 "gemma.intevation.de/gemma/pkg/common"
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26 "gemma.intevation.de/gemma/pkg/middleware"
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27 )
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28
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29 const (
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30 selectBottlenecksLimitingSQL = `
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31 SELECT
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32 lower(validity),
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33 upper(validity),
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34 limiting
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35 FROM
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36 waterway.bottlenecks
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37 WHERE
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38 bottleneck_id = $1 AND
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39 validity && tstzrange($2, $3)`
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40 )
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41
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42 type (
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43 limitingValidity struct {
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44 limiting string
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45 lower time.Time
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46 upper time.Time
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47 }
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48
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49 limitingValidities []limitingValidity
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50 )
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51
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52 func (lv *limitingValidity) intersects(from, to time.Time) bool {
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53 return !(to.Before(lv.lower) || from.After(lv.upper))
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54 }
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55
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56 func (lvs limitingValidities) find() func(from, to time.Time) *limitingValidity {
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57
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58 var last *limitingValidity
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59
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60 return func(from, to time.Time) *limitingValidity {
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61 if last != nil && last.intersects(from, to) {
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62 return last
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63 }
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64 for i := range lvs {
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65 if lv := &lvs[i]; lv.intersects(from, to) {
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66 last = lv
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67 return lv
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68 }
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69 }
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70 return nil
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71 }
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72 }
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73
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74 func loadLimitingValidities(
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75 ctx context.Context,
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76 conn *sql.Conn,
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77 bottleneckID string,
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78 from, to time.Time,
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79 ) (limitingValidities, error) {
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80
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81 var lvs limitingValidities
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82
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83 rows, err := conn.QueryContext(
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84 ctx,
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85 selectLimitingSQL,
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86 from, to)
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87
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88 if err != nil {
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89 return nil, err
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90 }
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91 defer rows.Close()
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92
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93 for rows.Next() {
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94 var lv limitingValidity
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95 if err := rows.Scan(
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96 &lv.limiting,
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97 &lv.lower,
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98 &lv.upper,
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99 ); err != nil {
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100 return nil, err
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101 }
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102 lv.lower = lv.lower.UTC()
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103 lv.upper = lv.upper.UTC()
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104 lvs = append(lvs, lv)
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105 }
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106
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107 return lvs, rows.Err()
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108 }
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109
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110 func fairwayAvailability(rw http.ResponseWriter, req *http.Request) {
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111
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112 vars := mux.Vars(req)
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113
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114 switch vars["kind"] {
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115 case "bottleneck":
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116 fairwayAvailabilityBottleneck(rw, req)
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117 case "stretch": // TODO: Implement me!
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118 case "section": // TODO: Implement me!
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119 default:
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120 http.Error(rw, "Invalid kind type.", http.StatusBadRequest)
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121 return
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122 }
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123 }
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124
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125 func parseFromTo(
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126 rw http.ResponseWriter,
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127 req *http.Request,
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128 ) (time.Time, time.Time, bool) {
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129 from, ok := parseFormTime(rw, req, "from", time.Now().AddDate(-1, 0, 0))
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130 if !ok {
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131 return time.Time{}, time.Time{}, false
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132 }
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133
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134 to, ok := parseFormTime(rw, req, "to", from.AddDate(1, 0, 0))
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135 if !ok {
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136 return time.Time{}, time.Time{}, false
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137 }
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138 from, to = common.OrderTime(from, to)
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139 return from, to, true
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140 }
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141
5195
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142 func fairwayAvailabilityBottleneck(rw http.ResponseWriter, req *http.Request) {
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143
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144 vars := mux.Vars(req)
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145
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146 bottleneckID := vars["name"]
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147 if bottleneckID == "" {
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148 http.Error(rw, "missing bottleneck_id", http.StatusBadRequest)
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149 return
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150 }
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151 log.Printf("info: fairway availability for bottleneck_id '%s'\n", bottleneckID)
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152
5196
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153 from, to, ok := parseFromTo(rw, req)
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154 if !ok {
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155 return
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156 }
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157
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158 los, ok := parseFormInt(rw, req, "los", 1)
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159 if !ok {
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160 return
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161 }
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162
5197
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163 ctx := req.Context()
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164 conn := middleware.GetDBConn(req)
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165
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Sascha L. Teichmann <sascha.teichmann@intevation.de>
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166 lvs, err := loadLimitingValidities(
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Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 5196
diff changeset
167 ctx,
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diff changeset
168 conn,
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169 bottleneckID,
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Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 5196
diff changeset
170 from, to)
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Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 5196
diff changeset
171 if err != nil {
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Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 5196
diff changeset
172 log.Printf("error: %v\n", err)
c352dbbf2778 Started with loading limiting factors and validities.
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parents: 5196
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173 http.Error(rw, "Loading validities failed", http.StatusInternalServerError)
c352dbbf2778 Started with loading limiting factors and validities.
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parents: 5196
diff changeset
174 return
c352dbbf2778 Started with loading limiting factors and validities.
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parents: 5196
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175 }
c352dbbf2778 Started with loading limiting factors and validities.
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176
5195
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parents: 5184
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177 // TODO: Implement me!
5196
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178 _ = los
5197
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179 _ = lvs
5195
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parents: 5184
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180 }