Refactor getcolor

projects/common-map/src/fm-map/components/aol/item-layers/item-layers.component.ts

@@ -3,7 +3,7 @@ import { LayerGroupComponent, MapComponent } from 'ngx-openlayers';
 import { ItemService,IItem,AppConfig } from '@farmmaps/common';
 import { IItemLayer, ITemporalItemLayer} from '../../../models/item.layer';
 import { ILayerData} from '../../../models/layer.data';
-import { IRenderoutputTiles,IRenderoutputImage,IGradientstop,ILayer,IHistogram} from '../../../models/color.map';
+import { IRenderoutputTiles,IRenderoutputImage,IGradientstop,ILayer,IHistogram,IColor} from '../../../models/color.map';
 import {Extent} from 'ol/extent';
 import Projection from 'ol/proj/Projection';
 import * as proj from 'ol/proj';
@@ -52,11 +52,8 @@ export class ItemLayersComponent extends LayerGroupComponent implements OnChange
      return "#" + this.componentToHex(r) + this.componentToHex(g) + this.componentToHex(b) + this.componentToHex(a);
   }
 
-  getColorFromGradient(item:IItem,layer: ILayer,  feature): style.Style {
-    var value = layer.indexKey ? feature.get(layer.indexKey): feature.get(layer.name);
-    var key = item.code + "_" + value;
-    if(!this.styleCache[key]) {
-      var gradient: IGradientstop[] = layer.renderer.colorMap.gradient;
+  getColorFromGradient(layer: ILayer, value: number): IColor {
+    var gradient: IGradientstop[] = layer.renderer.colorMap.gradient;
     var histogram: IHistogram = layer.renderer.band.histogram;
     var index = (value - histogram.min) / histogram.max;
     var min = gradient[0];
@@ -68,27 +65,53 @@ export class ItemLayersComponent extends LayerGroupComponent implements OnChange
     }
     var i = index - min.relativestop;
     var size = max.relativestop - min.relativestop;
-    var alpha = Math.round( min.color.alpha + ((max.color.alpha - min.color.alpha) * i / size));
+    var alpha = Math.round(min.color.alpha + ((max.color.alpha - min.color.alpha) * i / size));
     var red = Math.round(min.color.red + ((max.color.red - min.color.red) * i / size));
     var green = Math.round(min.color.green + ((max.color.green - min.color.green) * i / size));
     var blue = Math.round(min.color.blue + ((max.color.blue - min.color.blue) * i / size));
 
-    this.styleCache[key] = new style.Style(
-      {
-        image: new style.Circle({
-          fill: new style.Fill({
-            color: this.rgbaToHex(red,green,blue,alpha)
+    return { alpha: alpha, red: red, green: green, blue: blue };
+  }
+
+  getColorForValue(layer: ILayer, value: number): IColor {
+    var color: IColor =  { alpha:0,red:0,green:0,blue:0};
+    layer.renderer.colorMap.entries.forEach((entry) => {
+        if(entry.value==value) {
+          color =entry.color;
+          return;
+        }
+    });
+
+    return color;
+  }
+
+  getColor(item: IItem, layer: ILayer, feature): style.Style {
+    var value = layer.indexKey ? feature.get(layer.indexKey) : feature.get(layer.name);
+    var key = item.code + "_" + value;
+    if (!this.styleCache[key]) {
+      var color: IColor;
+      if(layer.renderer.colorMap.colormapType == "manual") {
+        color = this.getColorForValue(layer, value);
+      } else {
+        color = this.getColorFromGradient(layer, value);
+      }
+
+      this.styleCache[key] = new style.Style(
+        {
+          image: new style.Circle({
+            fill: new style.Fill({
+              color: this.rgbaToHex(color.red, color.green, color.blue, color.alpha)
+            }),
+            radius: 3
           }),
-          radius: 3
-        }),
-        fill: new style.Fill({
-          color: this.rgbaToHex(red, green, blue, alpha)
-        }),
-        stroke: new style.Stroke({
-          color: this.rgbaToHex(red, green, blue, 255),
-          width: 1.25
-        }),
-      });
+          fill: new style.Fill({
+            color: this.rgbaToHex(color.red, color.green, color.blue, color.alpha)
+          }),
+          stroke: new style.Stroke({
+            color: this.rgbaToHex(color.red, color.green, color.blue, 255),
+            width: 1.25
+          }),
+        });
     }
     return this.styleCache[key];
   }
@@ -133,7 +156,7 @@ export class ItemLayersComponent extends LayerGroupComponent implements OnChange
           url: `${this._apiEndPoint}/api/v1/items/${item.code}/vectortiles/{z}/{x}/{y}.pbf?v=${Date.parse(item.updated)}`
         }),
         style: (feature) => {
-          return this.getColorFromGradient(item,l, feature);
+          return this.getColor(item,l, feature);
         }
       })
     } else if (l && l.rendering && l.rendering.renderoutputType == "Tiles") {