初始

api/v1/common/source/mbt/mbt.go

@@ -0,0 +1,123 @@
+package mbt
+
+import (
+	"github.com/gogf/gf/v2/net/ghttp"
+	"github.com/tiger1103/gfast/v3/api/v1/common/globe"
+	"github.com/tiger1103/gfast/v3/api/v1/common/tool"
+	"github.com/tiger1103/gfast/v3/database"
+	"github.com/tiger1103/gfast/v3/database/sqlite"
+	"gorm.io/gorm"
+	"math"
+	"net/http"
+	"os"
+	"path"
+	"strings"
+)
+
+func InitMbtData(group *ghttp.RouterGroup) {
+	group.GET("/data/mbt/{source_id}/{z}/{x}/{y}.*", mbtCallback)
+}
+
+func mbtCallback(request *ghttp.Request) {
+	sourceId := request.Get("source_id").String()
+	mbtobj := database.GetSourceDB(sourceId)
+	if mbtobj.DB == nil {
+		request.Response.WriteStatus(http.StatusNotFound)
+		return
+	}
+	z := request.Get("z").Int()
+	x := request.Get("x").Int()
+	y := request.Get("y").Int()
+	y = int(math.Pow(2, float64(z))) - 1 - y
+	tile := Tile{}
+	RowsAffected := mbtobj.DB.Model(&Tile{}).
+		Select("tile_data").
+		Where(&Tile{ZoomLevel: z, TileColumn: x, TileRow: y}).First(&tile).RowsAffected
+	if RowsAffected > 0 {
+		request.Response.Header().Set("content-type", mbtobj.ContentType)
+		globe.RenderData(request, tile.TileData)
+		return
+	} else {
+		request.Response.WriteStatus(http.StatusNotFound)
+	}
+}
+
+type Tile struct {
+	TileData   []byte `json:"tile_data"`
+	ZoomLevel  int    `json:"zoom_level"`
+	TileColumn int    `json:"tile_column"`
+	TileRow    int    `json:"tile_row"`
+}
+
+type Metadata struct {
+	Name  string
+	Value string
+}
+
+func OpenMbt(mbtPath string, sourceID string) (error, *database.SourceObj) {
+	//if !globe.IS_OFFLINE_VERSION {
+	//	//网络版事  需要拼接数据地址，方便服务器迁移
+	//	mbtPath = path.Join(globe.SOURCE, mbtPath)
+	//}
+	getwd, err := os.Getwd()
+	if err != nil {
+		return err, nil
+	}
+	mbtPath = path.Join(getwd, mbtPath)
+	if !tool.PathExists(mbtPath) {
+		return globe.GetErrors("资源不存在," + mbtPath), nil
+	}
+	db, err := sqlite.OpenDB(mbtPath)
+	if err != nil {
+		return err, nil
+	}
+	var obj database.SourceObj
+	obj.DB = db
+	obj.Type = globe.LAYER
+	var meta []Metadata
+	db.Model(&Metadata{}).Find(&meta)
+	obj.Info.MinLevel, obj.Info.MaxLevel = startQueryLevel(db)
+	var format = "png"
+	for _, v := range meta {
+		if v.Name == "format" {
+			format = v.Value
+		}
+		if v.Name == "bounds" {
+			arr := strings.Split(v.Value, ",")
+			obj.Info.West = arr[0]
+			obj.Info.South = arr[1]
+			obj.Info.East = arr[2]
+			obj.Info.North = arr[3]
+		}
+		if v.Name == "profile" {
+			obj.Info.ProFile = v.Value
+		}
+		if v.Name == "description" {
+			//lsv下载的  自带投影，此时不需要加
+			if strings.Contains(v.Value, "LSV") {
+				obj.Info.TilingScheme = 0
+			} else {
+				obj.Info.TilingScheme = 1
+			}
+		}
+	}
+	obj.ContentType = "image/" + format
+	obj.Url = "/zm/api/v1/data/mbt/" + sourceID + "/{z}/{x}/{y}." + format
+	database.SetSourceDB(sourceID, obj)
+	return err, &obj
+}
+func startQueryLevel(db *gorm.DB) (min, max int) {
+	zoom_level := []int{0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22}
+	var existsLevels []int
+	for i := 0; i < len(zoom_level); i++ {
+		RowsAffected := db.Model(&Tile{}).Select("zoom_level").Where(&Tile{ZoomLevel: i}).Find(&Tile{}).RowsAffected
+		if RowsAffected > 0 {
+			existsLevels = append(existsLevels, i)
+		}
+	}
+	if len(existsLevels) > 0 {
+		min = existsLevels[0]
+		max = existsLevels[len(existsLevels)-1]
+	}
+	return
+}