Mercurial > gemma

annotate pkg/models/extservices.go @ 904:e4b72a199258

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New default bottleneck colors Mainly to make the stroke color one actually selectable in the ui. In addition the pink does better match the collors used on the ECDIS layer.
author Sascha Wilde <wilde@intevation.de>
date Tue, 02 Oct 2018 13:34:59 +0200
parents c10c76c92797
children a244b18cb916
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1 package models
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2
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3 import (
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4 "context"
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5 "database/sql"
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6 "log"
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7 "sort"
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8 "sync"
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9
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10 "gemma.intevation.de/gemma/pkg/auth"
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11 )
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12
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13 type ExtEntry struct {
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14 Name string `json:"name"`
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15 URL string `json:"url"`
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16 WFS bool `json:"wfs"`
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17 }
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18
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19 type ExtServices struct {
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20 mu sync.Mutex
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21 entries []ExtEntry
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22 }
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23
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24 var ExternalServices = &ExtServices{}
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25
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26 const selectExternalServices = `SELECT local_name, remote_url, is_wfs
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27 FROM sys_admin.external_services ORDER BY local_name`
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29 func (es *ExtServices) Find(name string) (string, bool) {
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30 es.mu.Lock()
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31 defer es.mu.Unlock()
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32
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33 if es.entries == nil {
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34 if err := es.load(); err != nil {
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35 log.Printf("error: %v\n", err)
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36 return "", false
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37 }
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38 }
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39 n := sort.Search(len(es.entries), func(i int) bool {
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40 return es.entries[i].Name >= name
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41 })
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42 if n == len(es.entries) || es.entries[n].Name != name {
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43 return "", false
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44 }
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45 return es.entries[n].URL, true
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46 }
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47
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48 func (es *ExtServices) load() error {
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49 // make empty slice to prevent retry if slice is empty.
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50 es.entries = []ExtEntry{}
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51 return auth.RunAs("sys_admin", context.Background(),
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52 func(conn *sql.Conn) error {
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53 rows, err := conn.QueryContext(
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54 context.Background(), selectExternalServices)
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55 if err != nil {
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56 return err
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57 }
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58 defer rows.Close()
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59 for rows.Next() {
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60 var entry ExtEntry
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61 if err := rows.Scan(
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62 &entry.Name,
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63 &entry.URL,
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64 &entry.WFS,
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65 ); err != nil {
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66 return err
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67 }
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68 es.entries = append(es.entries, entry)
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69 }
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70 return rows.Err()
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71 })
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72 }
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74 func (es *ExtServices) Invalidate() {
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75 es.mu.Lock()
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76 es.entries = nil
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77 es.mu.Unlock()
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78 }
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79
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80 func ExternalAll(ExtEntry) bool { return true }
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81 func ExternalWMS(entry ExtEntry) bool { return !entry.WFS }
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82 func ExternalWFS(entry ExtEntry) bool { return entry.WFS }
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83
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84 func (es *ExtServices) Filter(accept func(ExtEntry) bool) []ExtEntry {
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85 es.mu.Lock()
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86 defer es.mu.Unlock()
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87 if es.entries == nil {
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88 if err := es.load(); err != nil {
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89 log.Printf("error: %v\n", err)
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90 return nil
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91 }
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92 }
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93 ee := make([]ExtEntry, 0, len(es.entries))
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94 for _, e := range es.entries {
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95 if accept(e) {
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96 ee = append(ee, e)
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97 }
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98 }
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99 return ee
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100 }