From ca85cd759c65f08542f80a7d3a388a95c62b97f7 Mon Sep 17 00:00:00 2001
From: hisham waleed karam <hisham.karam@cartologic.com>
Date: Sun, 30 Sep 2018 13:54:47 +0200
Subject: [PATCH] add Layer Schema

---
 .gitignore                     |  2 +-
 cmd/layerSchema/layerSchema.go | 37 ++++++++++++++++++++++++
 layer.go                       | 51 ++++++++++++++++++++++++++++++++++
 3 files changed, 89 insertions(+), 1 deletion(-)
 create mode 100644 cmd/layerSchema/layerSchema.go

diff --git a/.gitignore b/.gitignore
index 6bdf0fb..ad16b87 100644
--- a/.gitignore
+++ b/.gitignore
@@ -50,4 +50,4 @@ _testmain.go
 # use alternative ways to exclude files from git.
 # For example, set up .git/info/exclude or use a global .gitignore.
 
-loca_config.yaml
\ No newline at end of file
+local_config.yaml
\ No newline at end of file
diff --git a/cmd/layerSchema/layerSchema.go b/cmd/layerSchema/layerSchema.go
new file mode 100644
index 0000000..d52d294
--- /dev/null
+++ b/cmd/layerSchema/layerSchema.go
@@ -0,0 +1,37 @@
+package main
+
+import (
+	"errors"
+	"flag"
+	"fmt"
+	"os"
+
+	"github.com/hishamkaram/gismanager"
+)
+
+func main() {
+	configFile := flag.String("config", "", "Config File")
+	flag.Parse()
+	if *configFile == "" {
+		panic(errors.New("config 'Parameter required'"))
+	}
+	if _, err := os.Stat(*configFile); os.IsNotExist(err) {
+		panic(errors.New("Config File Doesn't exist"))
+	}
+	manager, confErr := gismanager.FromConfig(*configFile)
+	if confErr != nil {
+		panic(confErr)
+	}
+	source, ok := manager.OpenSource(manager.Source.Path, 0)
+	if ok {
+		for index := 0; index < source.LayerCount(); index++ {
+			layer := source.LayerByIndex(index)
+			gLayer := gismanager.GdalLayer{
+				Layer: &layer,
+			}
+			for _, f := range gLayer.GetLayerSchema() {
+				fmt.Printf("\n%+v\n", *f)
+			}
+		}
+	}
+}
diff --git a/layer.go b/layer.go
index ad18dfe..78d2faf 100644
--- a/layer.go
+++ b/layer.go
@@ -11,6 +11,12 @@ type GdalLayer struct {
 	*gdal.Layer
 }
 
+//LayerField Field
+type LayerField struct {
+	Name string
+	Type string
+}
+
 //LayerToPostgis Layer to Postgis
 func (layer *GdalLayer) LayerToPostgis(targetSource gdal.DataSource) (newLayer *GdalLayer) {
 	if layer.Layer != nil {
@@ -21,3 +27,48 @@ func (layer *GdalLayer) LayerToPostgis(targetSource gdal.DataSource) (newLayer *
 	}
 	return
 }
+
+//GetGeomtryName Get Geometry Name
+func (layer *GdalLayer) GetGeomtryName() (geometryName string) {
+	geom := gdal.Create(layer.Layer.Type())
+	geometryName = geom.Name()
+	return
+}
+
+//GetLayerSchema Get Layer Schema
+func (layer *GdalLayer) GetLayerSchema() (fields []*LayerField) {
+	if layer.Layer != nil {
+		layerDef := layer.Layer.Definition()
+		geomField := LayerField{
+			Name: layer.Layer.GeometryColumn(),
+			Type: layer.GetGeomtryName(),
+		}
+		fields = append(fields, &geomField)
+		for index := 0; index < layerDef.FieldCount(); index++ {
+			fieldDef := layerDef.FieldDefinition(index)
+			layerField := LayerField{
+				Name: fieldDef.Name(),
+				Type: fieldDef.Type().Name(),
+			}
+			fields = append(fields, &layerField)
+
+		}
+	}
+	return
+}
+
+//GetFeature Get Layer Features
+func (layer *GdalLayer) GetFeature() (features []*gdal.Feature) {
+	if layer.Layer != nil {
+		count, ok := layer.Layer.FeatureCount(true)
+		if !ok {
+
+		} else {
+			for index := 0; index < count; index++ {
+				f := layer.Layer.Feature(index)
+				features = append(features, &f)
+			}
+		}
+	}
+	return
+}