add other flowcontrol ops. Update tests

src/core/operations/Fork.mjs

@@ -0,0 +1,121 @@
+/**
+ * @author n1474335 [n1474335@gmail.com]
+ * @copyright Crown Copyright 2018
+ * @license Apache-2.0
+ */
+
+import Operation from "../Operation";
+import Recipe from "../Recipe";
+import Dish from "../Dish";
+
+/**
+ * Fork operation
+ */
+class Fork extends Operation {
+
+    /**
+     * Fork constructor
+     */
+    constructor() {
+        super();
+
+        this.name = "Fork";
+        this.flowControl = true;
+        this.module = "Default";
+        this.description = "Split the input data up based on the specified delimiter and run all subsequent operations on each branch separately.<br><br>For example, to decode multiple Base64 strings, enter them all on separate lines then add the 'Fork' and 'From Base64' operations to the recipe. Each string will be decoded separately.";
+        this.inputType = "string";
+        this.outputType = "string";
+        this.args = [
+            {
+                "name": "Split delimiter",
+                "type": "binaryShortString",
+                "value": "\\n"
+            },
+            {
+                "name": "Merge delimiter",
+                "type": "binaryShortString",
+                "value": "\\n"
+            },
+            {
+                "name": "Ignore errors",
+                "type": "boolean",
+                "value": false
+            }
+        ];
+    }
+
+    /**
+     * Fork operation.
+     *
+     * @param {Object} state - The current state of the recipe.
+     * @param {number} state.progress - The current position in the recipe.
+     * @param {Dish} state.dish - The Dish being operated on.
+     * @param {Operation[]} state.opList - The list of operations in the recipe.
+     * @returns {Object} The updated state of the recipe.
+     */
+    async run(state) {
+        const opList     = state.opList,
+            inputType    = opList[state.progress].inputType,
+            outputType   = opList[state.progress].outputType,
+            input        = await state.dish.get(inputType),
+            ings         = opList[state.progress].ingValues,
+            splitDelim   = ings[0],
+            mergeDelim   = ings[1],
+            ignoreErrors = ings[2],
+            subOpList    = [];
+        let inputs       = [],
+            i;
+
+        if (input)
+            inputs = input.split(splitDelim);
+
+        // Create subOpList for each tranche to operate on
+        // (all remaining operations unless we encounter a Merge)
+        for (i = state.progress + 1; i < opList.length; i++) {
+            if (opList[i].name === "Merge" && !opList[i].disabled) {
+                break;
+            } else {
+                subOpList.push(opList[i]);
+            }
+        }
+
+        const recipe = new Recipe();
+        let output = "",
+            progress = 0;
+
+        state.forkOffset += state.progress + 1;
+
+        recipe.addOperations(subOpList);
+
+        // Take a deep(ish) copy of the ingredient values
+        const ingValues = subOpList.map(op => JSON.parse(JSON.stringify(op.ingValues)));
+
+        // Run recipe over each tranche
+        for (i = 0; i < inputs.length; i++) {
+            // Baseline ing values for each tranche so that registers are reset
+            subOpList.forEach((op, i) => {
+                op.ingValues = JSON.parse(JSON.stringify(ingValues[i]));
+            });
+
+            const dish = new Dish();
+            dish.set(inputs[i], inputType);
+
+            try {
+                progress = await recipe.execute(dish, 0, state);
+            } catch (err) {
+                if (!ignoreErrors) {
+                    throw err;
+                }
+                progress = err.progress + 1;
+            }
+            output += await dish.get(outputType) + mergeDelim;
+        }
+
+        state.dish.set(output, outputType);
+        state.progress += progress;
+        return state;
+    }
+
+}
+
+export default Fork;