annotate pkg/controllers/importqueue.go @ 1193:58acc343b1b6

Implemented the db stuff of the review process. Needs testing.
author Sascha L. Teichmann <sascha.teichmann@intevation.de>
date Fri, 16 Nov 2018 18:35:09 +0100
parents 3afa71405b87
children 7db850de0952
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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 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 "fmt"
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20 "log"
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21 "net/http"
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22 "strconv"
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23 "strings"
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24
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25 "gemma.intevation.de/gemma/pkg/imports"
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26 "gemma.intevation.de/gemma/pkg/models"
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27 "github.com/gorilla/mux"
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28 "github.com/jackc/pgx/pgtype"
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29 )
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30
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31 const (
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32 selectImportsSQL = `
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33 SELECT
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34 id,
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35 state::varchar,
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36 enqueued,
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37 kind,
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38 username
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39 FROM waterway.imports
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40 `
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41
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42 selectHasImportSQL = `
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43 SELECT true FROM Waterway.imports WHERE id = $1`
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44
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45 selectHasNoRunningImportSQL = `
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46 SELECT true FROM Waterway.imports
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47 WHERE id = $1 AND state <> 'running'::waterway.import_state`
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48
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49 selectImportLogsSQL = `
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50 SELECT
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51 time,
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52 kind::varchar,
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53 msg
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54 FROM waterway.import_logs
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55 WHERE import_id = $1
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56 ORDER BY time`
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57
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58 deleteLogsSQL = `
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59 DELETE FROM waterway.import_logs WHERE import_id = $1`
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60
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61 deleteImportSQL = `
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62 DELETE FROM waterway.imports WHERE id = $1`
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63 )
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64
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65 func toTextArray(txt string, allowed []string) *pgtype.TextArray {
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66 parts := strings.Split(txt, ",")
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67 var accepted []string
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68 for _, part := range parts {
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69 if part = strings.ToLower(strings.TrimSpace(part)); len(part) == 0 {
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70 continue
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71 }
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72 for _, a := range allowed {
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73 if part == a {
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74 accepted = append(accepted, part)
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75 break
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76 }
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77 }
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78 }
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79 if len(accepted) == 0 {
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80 return nil
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81 }
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82 var ta pgtype.TextArray
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83 if err := ta.Set(accepted); err != nil {
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84 log.Printf("warn: %v\n", err)
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85 return nil
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86 }
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87 return &ta
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88 }
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89
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90 func queryImportListStmt(
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91 conn *sql.Conn,
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92 ctx context.Context,
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93 vars map[string]string,
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94 ) (*sql.Rows, error) {
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95
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96 var (
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97 stmt strings.Builder
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98 args []interface{}
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99 states *pgtype.TextArray
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100 kinds *pgtype.TextArray
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101 )
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102
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103 if st, found := vars["states"]; found {
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104 states = toTextArray(st, imports.ImportStateNames)
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105 }
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106
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107 if ks, found := vars["kinds"]; found {
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108 kinds = toTextArray(ks, imports.ImportKindNames)
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109 }
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110
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111 stmt.WriteString(selectImportsSQL)
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112 if states != nil || kinds != nil {
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113 stmt.WriteString(" WHERE ")
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114 }
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115
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116 if states != nil {
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117 fmt.Fprintf(&stmt, " states = ANY($%d) ", len(args)+1)
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118 args = append(args, states)
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119 }
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120
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121 if states != nil && kinds != nil {
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122 stmt.WriteString("AND")
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123 }
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124
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125 if kinds != nil {
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126 fmt.Fprintf(&stmt, " kind = ANY($%d) ", len(args)+1)
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127 args = append(args, kinds)
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128 }
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129
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130 stmt.WriteString(" ORDER BY enqueued DESC ")
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131
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132 if lim, found := vars["limit"]; found {
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133 fmt.Fprintf(&stmt, " LIMIT $%d ", len(args)+1)
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134 limit, _ := strconv.ParseInt(lim, 10, 64)
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135 args = append(args, limit)
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136 }
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137
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138 if ofs, found := vars["offset"]; found {
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139 fmt.Fprintf(&stmt, " OFFSET $%d ", len(args)+1)
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140 offset, _ := strconv.ParseInt(ofs, 10, 64)
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141 args = append(args, offset)
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142 }
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143
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144 return conn.QueryContext(ctx, stmt.String(), args...)
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145 }
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146
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147 func listImports(
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148 _ interface{},
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149 req *http.Request,
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150 conn *sql.Conn,
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151 ) (jr JSONResult, err error) {
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152
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153 var rows *sql.Rows
1189
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154 rows, err = queryImportListStmt(conn, req.Context(), mux.Vars(req))
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155 if err != nil {
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156 return
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157 }
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158 defer rows.Close()
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159
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160 imports := make([]*models.Import, 0, 20)
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161
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162 for rows.Next() {
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163 var it models.Import
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164 if err = rows.Scan(
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165 &it.ID,
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166 &it.State,
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167 &it.Enqueued,
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168 &it.Kind,
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169 &it.User,
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170 ); err != nil {
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171 return
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172 }
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173 imports = append(imports, &it)
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174 }
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175
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176 if err = rows.Err(); err != nil {
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177 return
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178 }
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179
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180 jr = JSONResult{
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181 Result: struct {
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182 Imports []*models.Import `json:"imports"`
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183 }{
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184 Imports: imports,
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185 },
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186 }
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187 return
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188 }
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189
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190 func importLogs(
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191 _ interface{},
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192 req *http.Request,
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193 conn *sql.Conn,
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194 ) (jr JSONResult, err error) {
1031
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195
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196 ctx := req.Context()
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197
1026
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198 id, _ := strconv.ParseInt(mux.Vars(req)["id"], 10, 64)
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199
1031
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200 // Check if he have such a import job first.
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201 var dummy bool
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202 err = conn.QueryRowContext(ctx, selectHasImportSQL, id).Scan(&dummy)
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203 switch {
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204 case err == sql.ErrNoRows:
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205 err = JSONError{
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206 Code: http.StatusNotFound,
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207 Message: fmt.Sprintf("Cannot find import #%d.", id),
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208 }
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209 return
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210 case err != nil:
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211 return
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212 }
1026
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213
1031
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214 // We have it -> generate log entries.
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215 var rows *sql.Rows
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216 rows, err = conn.QueryContext(ctx, selectImportLogsSQL, id)
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217 if err != nil {
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218 return
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219 }
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220 defer rows.Close()
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221
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222 entries := make([]*models.ImportLogEntry, 0, 10)
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223
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224 for rows.Next() {
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225 var entry models.ImportLogEntry
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226 if err = rows.Scan(&entry.Time, &entry.Kind, &entry.Message); err != nil {
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227 return
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228 }
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229 entries = append(entries, &entry)
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230 }
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231
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232 if err = rows.Err(); err != nil {
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233 return
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234 }
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235
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236 jr = JSONResult{
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237 Result: struct {
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diff changeset
238 Entries []*models.ImportLogEntry `json:"entries"`
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239 }{
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240 Entries: entries,
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241 },
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242 }
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243 return
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244 }
1037
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245
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246 func deleteImport(
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247 _ interface{},
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248 req *http.Request,
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249 conn *sql.Conn,
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250 ) (jr JSONResult, err error) {
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251
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252 ctx := req.Context()
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253 id, _ := strconv.ParseInt(mux.Vars(req)["id"], 10, 64)
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254
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255 var tx *sql.Tx
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256 tx, err = conn.BeginTx(ctx, nil)
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257 if err != nil {
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258 return
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259 }
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260 defer tx.Rollback()
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261
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262 // Check if he have such a import job first.
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263 var dummy bool
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264 err = tx.QueryRowContext(ctx, selectHasNoRunningImportSQL, id).Scan(&dummy)
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265 switch {
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266 case err == sql.ErrNoRows:
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267 err = JSONError{
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268 Code: http.StatusNotFound,
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269 Message: fmt.Sprintf("Cannot find import #%d.", id),
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270 }
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271 return
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272 case err != nil:
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273 return
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274 }
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275
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276 if _, err = tx.ExecContext(ctx, deleteLogsSQL, id); err != nil {
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277 return
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278 }
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279
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280 if _, err = tx.ExecContext(ctx, deleteImportSQL, id); err != nil {
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281 return
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282 }
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283
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284 if err = tx.Commit(); err != nil {
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285 return
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286 }
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287
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288 jr = JSONResult{Code: http.StatusNoContent}
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289
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290 return
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291 }
1192
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292
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293 const (
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294 isPendingSQL = `
1193
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295 SELECT state = 'pending'::waterway.import_state, kind WHERE id = $1`
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296
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297 reviewSQL = `
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298 UPDATE waterway.imports SET state = $1::waterway.import_state
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299 WHERE id = $2`
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300
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301 deleteImportDataSQL = `SELECT waterway.del_import($1)`
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302
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303 deleteImportTrackSQL = `
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304 DELETE FROM waterway.track_imports WHERE import_id = $1`
1192
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305 )
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306
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307 func reviewImport(
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308 _ interface{},
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309 req *http.Request,
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310 conn *sql.Conn,
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311 ) (jr JSONResult, err error) {
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312
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313 vars := mux.Vars(req)
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314 id, _ := strconv.ParseInt(vars["id"], 10, 64)
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315 state := vars["state"]
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316
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317 ctx := req.Context()
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318 var tx *sql.Tx
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319 if tx, err = conn.BeginTx(ctx, nil); err != nil {
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320 return
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321 }
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diff changeset
322 defer tx.Rollback()
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323
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324 var pending bool
1193
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325 var kind string
1192
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326
1193
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327 err = tx.QueryRowContext(ctx, isPendingSQL, id).Scan(&pending, &kind)
1192
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diff changeset
328 switch {
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329 case err == sql.ErrNoRows:
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330 err = JSONError{
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331 Code: http.StatusNotFound,
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332 Message: fmt.Sprintf("Cannot find import #%d.", id),
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diff changeset
333 }
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diff changeset
334 return
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diff changeset
335 case err != nil:
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336 return
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337 case !pending:
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338 err = JSONError{
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339 Code: http.StatusBadRequest,
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340 Message: fmt.Sprintf("Import %d is not pending.", id),
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diff changeset
341 }
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342 return
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diff changeset
343 }
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344
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diff changeset
345 if state == "accepted" {
1193
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diff changeset
346 if jc := imports.FindJobCreator(imports.JobKind(kind)); jc != nil {
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diff changeset
347 if err = jc.StageDone(tx, ctx, id); err != nil {
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348 return
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diff changeset
349 }
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diff changeset
350 }
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351
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diff changeset
352 if _, err = tx.ExecContext(ctx, deleteImportTrackSQL, id); err != nil {
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diff changeset
353 return
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diff changeset
354 }
1192
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diff changeset
355 } else {
1193
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diff changeset
356 if _, err = tx.ExecContext(ctx, deleteImportDataSQL, id); err != nil {
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diff changeset
357 return
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diff changeset
358 }
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diff changeset
359 }
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diff changeset
360
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diff changeset
361 if _, err = tx.ExecContext(ctx, reviewSQL, state, id); err != nil {
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diff changeset
362 return
1192
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diff changeset
363 }
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diff changeset
364
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diff changeset
365 if err = tx.Commit(); err != nil {
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diff changeset
366 return
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diff changeset
367 }
3afa71405b87 Added REST endpoint to accept or decline an import.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 1189
diff changeset
368 return
3afa71405b87 Added REST endpoint to accept or decline an import.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 1189
diff changeset
369 }