Mercurial > gemma
annotate pkg/models/sr.go @ 1329:ea2143adc6d3
Named method recievers consistently to make golint happy.
author | Sascha L. Teichmann <sascha.teichmann@intevation.de> |
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date | Sun, 25 Nov 2018 17:05:19 +0100 |
parents | d753ce6cf588 |
children | 785f14264426 |
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 // * Bernhard E. Reiter <bernhard.reiter@intevation.de> |
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14 |
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15 package models |
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16 |
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17 import ( |
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18 "context" |
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19 "database/sql" |
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20 "encoding/json" |
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21 "errors" |
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22 "fmt" |
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23 "io" |
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24 "time" |
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25 ) |
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26 |
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27 const ( |
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28 SoundingResultDateFormat = "2006-01-02" |
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29 WGS84 = 4326 |
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30 ) |
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31 |
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32 type ( |
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33 SoundingResultDate struct{ time.Time } |
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34 |
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35 SoundingResultMeta struct { |
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36 Date SoundingResultDate `json:"date"` |
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37 Bottleneck string `json:"bottleneck"` |
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38 EPSG uint `json:"epsg"` |
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39 DepthReference string `json:"depth-reference"` |
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40 } |
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41 ) |
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42 |
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43 const ( |
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44 checkDepthReferenceSQL = ` |
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45 SELECT true FROM depth_references WHERE depth_reference = $1` |
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46 |
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47 checkBottleneckSQL = ` |
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48 SELECT true FROM waterway.bottlenecks WHERE objnam = $1` |
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49 |
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50 checkBottleneckDateUniqueSQL = ` |
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51 SELECT true FROM waterway.sounding_results sr JOIN |
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52 waterway.bottlenecks bn ON sr.bottleneck_id = bn.bottleneck_id |
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53 WHERE bn.objnam = $1 AND sr.date_info = $2` |
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54 ) |
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55 |
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56 func (srd *SoundingResultDate) UnmarshalJSON(data []byte) error { |
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57 var s string |
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58 if err := json.Unmarshal(data, &s); err != nil { |
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59 return err |
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60 } |
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61 d, err := time.Parse(SoundingResultDateFormat, s) |
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62 if err == nil { |
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63 *srd = SoundingResultDate{d} |
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64 } |
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65 return err |
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66 } |
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67 |
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68 func (m *SoundingResultMeta) Decode(r io.Reader) error { |
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69 err := json.NewDecoder(r).Decode(m) |
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70 if err == nil && m.EPSG == 0 { |
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71 m.EPSG = WGS84 |
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72 } |
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73 return err |
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74 } |
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75 |
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76 func (m *SoundingResultMeta) Validate(ctx context.Context, conn *sql.Conn) []error { |
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77 |
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78 var errs []error |
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79 |
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80 var b bool |
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81 err := conn.QueryRowContext(ctx, |
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82 checkDepthReferenceSQL, |
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83 m.DepthReference).Scan(&b) |
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84 switch { |
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85 case err == sql.ErrNoRows: |
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86 errs = append(errs, fmt.Errorf("Unknown depth reference '%s'\n", m.DepthReference)) |
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87 case err != nil: |
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88 errs = append(errs, err) |
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89 case !b: |
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90 errs = append(errs, errors.New("Unexpected depth reference")) |
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91 } |
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92 |
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93 err = conn.QueryRowContext(ctx, |
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94 checkBottleneckSQL, |
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95 m.Bottleneck).Scan(&b) |
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96 switch { |
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97 case err == sql.ErrNoRows: |
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98 errs = append(errs, fmt.Errorf("Unknown bottleneck '%s'\n", m.Bottleneck)) |
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99 case err != nil: |
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100 errs = append(errs, err) |
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101 case !b: |
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102 errs = append(errs, errors.New("Unexpected bottleneck")) |
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103 } |
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104 |
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105 err = conn.QueryRowContext(ctx, |
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106 checkBottleneckDateUniqueSQL, |
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107 m.Bottleneck, m.Date.Time).Scan(&b) |
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108 switch { |
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109 case err == sql.ErrNoRows: // good! -> unique. |
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110 case err != nil: |
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111 errs = append(errs, err) |
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112 case b: |
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113 errs = append(errs, |
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114 errors.New("Sounding result for this date already exists.")) |
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115 } |
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116 |
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117 return errs |
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118 } |