start of math operations

src/core/config/OperationConfig.js

@@ -1,3 +1,4 @@
+import Arithmetic from "../operations/Arithmetic.js";
 import Base from "../operations/Base.js";
 import Base58 from "../operations/Base58.js";
 import Base64 from "../operations/Base64.js";
@@ -656,6 +657,24 @@ const OperationConfig = {
             }
         ]
     },
+    "Arithmetic": {
+        module: "Default",
+        description: "Conducts mathamatical operations on a list of numbers",
+        inputType: "string"
+        outputType: "string"
+        args: [
+            {
+                name: "Delimiter",
+                type: "option",
+                value: Arithmetic.DELIM_OPTIONS
+            },
+            {
+                name: "Operation"
+                type: "option",
+                value: Arithmetic.OPERATIONS
+            }
+        ]
+    },
     "From Hexdump": {
         module: "Default",
         description: "Attempts to convert a hexdump back into raw data. This operation supports many different hexdump variations, but probably not all. Make sure you verify that the data it gives you is correct before continuing analysis.",

src/core/operations/Arithmetic.js

@@ -0,0 +1,130 @@
+import Utils from "../Utils.js";
+
+/**
+ * Math operations on numbers.
+ *
+ * @author bwhitn [brian.m.whitney@outlook.com]
+ * @copyright Crown Copyright 2016
+ * @license Apache-2.0
+ *
+ * @namespace
+ */
+const Arithmetic = {
+
+    /**
+     * @constant
+     * @default
+     */
+    DELIM_OPTIONS: ["Space", "Comma", "Semi-colon", "Colon", "Line feed", "CRLF"],
+
+    /**
+     * @constant
+     * @default
+     */
+    OPERATIONS: ["Sum", "Sub", "Multiply", "Divide", "Mean", "Median", "Mode"],
+
+    /**
+     * A mapping of operation names to their function.
+     * @constant
+     */
+     opMap: {
+         "Sub":         _sub,
+         "Sum":         _sum,
+         "Multiply":    _multiply,
+         "Divide":      _divide,
+         "Mean":        _mean,
+         "Median":      _median,
+         "Mode":        _mode,
+     },
+
+    /**
+     *
+     *
+     * @param {string} input
+     * @param {Object[]} args
+     * @returns {string}
+     */
+    runOp: function(input, args) {
+        const delim = Utils.charRep[args[0] || "Space"];
+        let splitNumbers = input.split(delim),
+            numbers = [],
+            num,
+            retVal;
+        for (i = 0; i < splitNumbers.length; i++) {
+            if splitNumbers[i].indexOf(".") {
+                num = parseFloat(splitNumbers[i].trim());
+            } else {
+                num = parseInt(splitNumbers[i].trim());
+            }
+            if (num !== "NaN") {
+                numbers.append(num);
+            }
+        }
+        num = Arithmetic.opMap[args[1] || "Sum"](numbers);
+        if (num !== null) {
+            return "The values " + args[1] + "equal: " + num;
+        }
+        throw "Error with Arithmetic Operation: " + args[1];
+    },
+
+
+    _sum: function(data) {
+        let total = 0;
+        for (i = 0; i < data.length; i++) {
+            total += data[i];
+        }
+        return total;
+    },
+
+    _sub: function(data) {
+        let total = 0;
+        if (data.length > 1) {
+            total = data[0];
+            for (i = 1; i < data.length; i++) {
+                total -= data[i];
+            }
+        } else {
+            total = null;
+        }
+        return total;
+    },
+
+    _multiply: function(data) {
+        let total = 0;
+        if (data.length > 1) {
+            total = data[0];
+            for (i = 1; i < data.length; i++) {
+                total *= data[i];
+            }
+        } else {
+            total = null;
+        }
+        return total;
+    },
+
+    _divide: function(data) {
+        let total = 0;
+        if (data.length > 1) {
+            total = data[0];
+            for (i = 1; i < data.length; i++) {
+                total /= data[i]
+            }
+        } else {
+            total = null;
+        }
+        return total;
+    },
+
+    _mean: function(data) {
+        let total = 0;
+        if (data.length > 1) {
+            total = Arithmetic._sum(data) / data.length;
+        } else {
+            total = null;
+        }
+        return total;
+    },
+
+};
+
+export default Arithmetic;