127 lines
2.8 KiB
Go
127 lines
2.8 KiB
Go
package writer
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import (
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"goposm/cache"
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"goposm/database"
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"goposm/element"
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"goposm/geom"
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"goposm/geom/geos"
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"goposm/mapping"
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"goposm/proj"
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"goposm/stats"
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"log"
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"sync"
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)
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type WayWriter struct {
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OsmElemWriter
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ways chan *element.Way
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lineStringTagMatcher *mapping.TagMatcher
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polygonTagMatcher *mapping.TagMatcher
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}
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func NewWayWriter(osmCache *cache.OSMCache, diffCache *cache.DiffCache, ways chan *element.Way,
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insertBuffer database.RowInserter, lineStringTagMatcher *mapping.TagMatcher,
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polygonTagMatcher *mapping.TagMatcher, progress *stats.Statistics, srid int) *OsmElemWriter {
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ww := WayWriter{
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OsmElemWriter: OsmElemWriter{
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osmCache: osmCache,
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diffCache: diffCache,
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progress: progress,
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wg: &sync.WaitGroup{},
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insertBuffer: insertBuffer,
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srid: srid,
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},
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ways: ways,
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lineStringTagMatcher: lineStringTagMatcher,
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polygonTagMatcher: polygonTagMatcher,
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}
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ww.OsmElemWriter.writer = &ww
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return &ww.OsmElemWriter
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}
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func (ww *WayWriter) loop() {
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geos := geos.NewGeos()
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geos.SetHandleSrid(ww.srid)
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defer geos.Finish()
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for w := range ww.ways {
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ww.progress.AddWays(1)
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if len(w.Tags) == 0 {
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continue
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}
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inserted, err := ww.osmCache.InsertedWays.IsInserted(w.Id)
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if err != nil {
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log.Println(err)
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continue
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}
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if inserted {
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continue
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}
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err = ww.osmCache.Coords.FillWay(w)
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if err != nil {
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continue
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}
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proj.NodesToMerc(w.Nodes)
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inserted = false
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if matches := ww.lineStringTagMatcher.Match(&w.Tags); len(matches) > 0 {
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ww.buildAndInsert(geos, w, matches, geom.LineString)
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inserted = true
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}
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if w.IsClosed() {
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if matches := ww.polygonTagMatcher.Match(&w.Tags); len(matches) > 0 {
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ww.buildAndInsert(geos, w, matches, geom.Polygon)
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inserted = true
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}
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}
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if inserted && ww.expireTiles != nil {
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ww.expireTiles.ExpireFromNodes(w.Nodes)
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}
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if ww.diffCache != nil {
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ww.diffCache.Coords.AddFromWay(w)
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}
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}
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ww.wg.Done()
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}
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type geomBuilder func(*geos.Geos, []element.Node) (*geos.Geom, error)
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func (ww *WayWriter) buildAndInsert(geos *geos.Geos, w *element.Way, matches []mapping.Match, builder geomBuilder) {
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var err error
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// make copy to avoid interference with polygon/linestring matches
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way := element.Way(*w)
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geosgeom, err := builder(geos, way.Nodes)
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if err != nil {
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if err, ok := err.(ErrorLevel); ok {
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if err.Level() <= 0 {
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return
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}
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}
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log.Println(err)
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return
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}
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way.Geom, err = geom.AsGeomElement(geos, geosgeom)
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if err != nil {
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log.Println(err)
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return
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}
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if ww.limiter != nil {
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parts, err := ww.limiter.Clip(way.Geom.Geom)
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if err != nil {
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log.Println(err)
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return
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}
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for _, g := range parts {
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way := element.Way(*w)
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way.Geom = &element.Geometry{g, geos.AsEwkbHex(g)}
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ww.insertMatches(&way.OSMElem, matches)
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}
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} else {
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ww.insertMatches(&way.OSMElem, matches)
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}
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}
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