1 files changed, 59 insertions, 0 deletions
diff --git a/src/fields/HistogramField.ts b/src/fields/HistogramField.ts
new file mode 100644
index 000000000..bb0014ab3
--- /dev/null
+++ b/src/fields/HistogramField.ts
@@ -0,0 +1,59 @@
+import { BasicField } from "./BasicField";
+import { Field, FieldId } from "./Field";
+import { Types } from "../server/Message";
+import { HistogramOperation } from "../client/northstar/operations/HistogramOperation";
+import { action } from "mobx";
+import { AttributeTransformationModel } from "../client/northstar/core/attribute/AttributeTransformationModel";
+import { ColumnAttributeModel } from "../client/northstar/core/attribute/AttributeModel";
+import { CurrentUserUtils } from "../server/authentication/models/current_user_utils";
+
+
+export class HistogramField extends BasicField<HistogramOperation> {
+    constructor(data?: HistogramOperation, id?: FieldId, save: boolean = true) {
+        super(data ? data : HistogramOperation.Empty, save, id);
+    }
+
+    toString(): string {
+        return JSON.stringify(this.Data);
+    }
+
+    Copy(): Field {
+        return new HistogramField(this.Data);
+    }
+
+    ToScriptString(): string {
+        return `new HistogramField("${this.Data}")`;
+    }
+
+    ToJson(): { type: Types, data: string, _id: string } {
+        return {
+            type: Types.HistogramOp,
+            data: JSON.stringify(this.Data),
+            _id: this.Id
+        }
+    }
+
+    @action
+    static FromJson(id: string, data: any): HistogramField {
+        let jp = JSON.parse(data);
+        let X: AttributeTransformationModel | undefined;
+        let Y: AttributeTransformationModel | undefined;
+        let V: AttributeTransformationModel | undefined;
+
+        CurrentUserUtils.GetAllNorthstarColumnAttributes().map(attr => {
+            if (attr.displayName == jp.X.AttributeModel.Attribute.DisplayName) {
+                X = new AttributeTransformationModel(new ColumnAttributeModel(attr), jp.X.AggregateFunction);
+            }
+            if (attr.displayName == jp.Y.AttributeModel.Attribute.DisplayName) {
+                Y = new AttributeTransformationModel(new ColumnAttributeModel(attr), jp.Y.AggregateFunction);
+            }
+            if (attr.displayName == jp.V.AttributeModel.Attribute.DisplayName) {
+                V = new AttributeTransformationModel(new ColumnAttributeModel(attr), jp.V.AggregateFunction);
+            }
+        });
+        if (X && Y && V) {
+            return new HistogramField(new HistogramOperation(X, Y, V, jp.Normalization), id, false);
+        }
+        return new HistogramField(HistogramOperation.Empty, id, false);
+    }
+}
+\ No newline at end of file