add server to monorepo.

packages/server/src/services/FinancialStatements/FinancialEvaluateEquation.ts

@@ -0,0 +1,62 @@
+import * as mathjs from 'mathjs';
+import * as R from 'ramda';
+import { compose } from 'lodash/fp';
+import { omit, get, mapValues } from 'lodash';
+import { FinancialSheetStructure } from './FinancialSheetStructure';
+
+export const FinancialEvaluateEquation = (Base) =>
+  class extends compose(FinancialSheetStructure)(Base) {
+    /**
+     * Evauluate equaation string with the given scope table.
+     * @param {string} equation -
+     * @param {{ [key: string]: number }} scope -
+     * @return {number}
+     */
+    protected evaluateEquation = (
+      equation: string,
+      scope: { [key: string | number]: number }
+    ): number => {
+      return mathjs.evaluate(equation, scope);
+    };
+
+    /**
+     * Transformes the given nodes nested array to object key/value by id.
+     * @param nodes
+     * @returns
+     */
+    private transformNodesToMap = (nodes: any[]) => {
+      return this.mapAccNodesDeep(
+        nodes,
+        (node, key, parentValue, acc, context) => {
+          if (node.id) {
+            acc[`${node.id}`] = omit(node, ['children']);
+          }
+          return acc;
+        },
+        {}
+      );
+    };
+
+    /**
+     *
+     * @param nodesById
+     * @returns
+     */
+    private mapNodesToTotal = R.curry(
+      (path: string, nodesById: { [key: number]: any }) => {
+        return mapValues(nodesById, (node) => get(node, path, 0));
+      }
+    );
+
+    /**
+     *
+     */
+    protected getNodesTableForEvaluating = R.curry(
+      (path = 'total.amount', nodes) => {
+        return R.compose(
+          this.mapNodesToTotal(path),
+          this.transformNodesToMap
+        )(nodes);
+      }
+    );
+  };