func importDatasource(importFile string) {
fmt.Println("Importing", importFile)
// setup database
setupDb()
// get geojson file
var geojsonFile string
ext := strings.Split(importFile, ".")[1]
// convert shapefile
if ext == "shp" {
// Convert .shp to .geojson
// ogr2ogr -f GeoJSON -t_srs crs:84 [name].geojson [name].shp
geojsonFile := strings.Replace(importFile, ".shp", ".geojson", -1)
// fmt.Println("ogr2ogr", "-f", "GeoJSON", "-t_srs", "crs:84", geojsonFile, shapefile)
out, err := exec.Command("ogr2ogr", "-f", "GeoJSON", "-t_srs", "crs:84", geojsonFile, importFile).Output()
if err != nil {
fmt.Println(err)
fmt.Println(string(out))
os.Exit(1)
} else {
fmt.Println(geojsonFile, "created")
fmt.Println(string(out))
}
} else if ext == "geojson" {
geojsonFile = importFile
} else {
fmt.Println("Unsupported file type", ext)
os.Exit(1)
}
// Read .geojson file
file, err := ioutil.ReadFile(geojsonFile)
if err != nil {
fmt.Printf("File error: %v\n", err)
os.Exit(1)
}
// Unmarshal to geojson struct
geojs, err := geojson.UnmarshalFeatureCollection(file)
if err != nil {
fmt.Printf("Unmarshal GeoJSON error: %v\n", err)
os.Exit(1)
}
// Create datasource
ds, _ := utils.NewUUID()
app.DB.InsertLayer(ds, geojs)
fmt.Println("Datasource created:", ds)
// Cleanup artifacts
if geojsonFile != importFile {
os.Remove(geojsonFile)
}
}
// NewLayer creates new datasource layer
// @returns string - datasource id
// @returns Error
func (self *Database) NewLayer() (string, error) {
// create geojson
datasource, _ := utils.NewUUID()
geojs := geojson.NewFeatureCollection()
// convert to bytes
value, err := geojs.MarshalJSON()
if err != nil {
return "", nil
}
self.commit_log_queue <- `{"method": "new_layer", "data": { "datasource": "` + datasource + `", "layer": ` + string(value) + `}}`
// Insert layer into database
err = self.Insert("layers", datasource, value)
if err != nil {
panic(err)
}
return datasource, err
}
