Charts port to ESM

package.json

@@ -90,6 +90,8 @@
     "crypto-api": "^0.8.3",
     "crypto-js": "^3.1.9-1",
     "ctph.js": "0.0.5",
+    "d3": "^4.9.1",
+    "d3-hexbin": "^0.2.2",
     "diff": "^3.5.0",
     "es6-promisify": "^6.0.1",
     "escodegen": "^1.11.0",
@@ -118,6 +120,7 @@
     "ngeohash": "^0.6.3",
     "node-forge": "^0.7.6",
     "node-md6": "^0.1.0",
+    "nodom": "^2.1.0",
     "notepack.io": "^2.2.0",
     "nwmatcher": "^1.4.4",
     "otp": "^0.1.3",

src/core/Utils.mjs

@@ -1026,6 +1026,7 @@ class Utils {
             "Comma":         ",",
             "Semi-colon":    ";",
             "Colon":         ":",
+            "Tab":           "\t",
             "Line feed":     "\n",
             "CRLF":          "\r\n",
             "Forward slash": "/",

src/core/config/Categories.json

@@ -362,6 +362,10 @@
             "Remove EXIF",
             "Extract EXIF",
             "Split Colour Channels",
+            "Hex Density chart",
+            "Scatter chart",
+            "Series chart",
+            "Heatmap chart",
             "Rotate Image",
             "Resize Image",
             "Blur Image",

src/core/lib/Charts.mjs

@@ -0,0 +1,175 @@
+/**
+ * @author tlwr [toby@toby.codes] - Original
+ * @author Matt C [me@mitt.dev] - Conversion to new format
+ * @copyright Crown Copyright 2019
+ * @license Apache-2.0
+ */
+
+import OperationError from "../errors/OperationError";
+
+ /**
+ * @constant
+ * @default
+ */
+export const RECORD_DELIMITER_OPTIONS = ["Line feed", "CRLF"];
+
+
+/**
+ * @constant
+ * @default
+ */
+export const FIELD_DELIMITER_OPTIONS = ["Space", "Comma", "Semi-colon", "Colon", "Tab"];
+
+
+/**
+ * Default from colour
+ *
+ * @constant
+ * @default
+ */
+export const COLOURS = {
+    min: "white",
+    max: "black"
+};
+
+
+/**
+ * Gets values from input for a plot.
+ *
+ * @param {string} input
+ * @param {string} recordDelimiter
+ * @param {string} fieldDelimiter
+ * @param {boolean} columnHeadingsAreIncluded - whether we should skip the first record
+ * @returns {Object[]}
+ */
+export function getValues(input, recordDelimiter, fieldDelimiter, columnHeadingsAreIncluded, length) {
+    let headings;
+    const values = [];
+
+    input
+        .split(recordDelimiter)
+        .forEach((row, rowIndex) => {
+            const split = row.split(fieldDelimiter);
+            if (split.length !== length) throw new OperationError(`Each row must have length ${length}.`);
+
+            if (columnHeadingsAreIncluded && rowIndex === 0) {
+                headings = split;
+            } else {
+                values.push(split);
+            }
+        });
+    return { headings, values};
+}
+
+
+/**
+ * Gets values from input for a scatter plot.
+ *
+ * @param {string} input
+ * @param {string} recordDelimiter
+ * @param {string} fieldDelimiter
+ * @param {boolean} columnHeadingsAreIncluded - whether we should skip the first record
+ * @returns {Object[]}
+ */
+export function getScatterValues(input, recordDelimiter, fieldDelimiter, columnHeadingsAreIncluded) {
+    let { headings, values } = getValues(
+        input,
+        recordDelimiter, fieldDelimiter,
+        columnHeadingsAreIncluded,
+        2
+    );
+
+    if (headings) {
+        headings = {x: headings[0], y: headings[1]};
+    }
+
+    values = values.map(row => {
+        const x = parseFloat(row[0], 10),
+            y = parseFloat(row[1], 10);
+
+        if (Number.isNaN(x)) throw new OperationError("Values must be numbers in base 10.");
+        if (Number.isNaN(y)) throw new OperationError("Values must be numbers in base 10.");
+
+        return [x, y];
+    });
+
+    return { headings, values };
+}
+
+/**
+ * Gets values from input for a scatter plot with colour from the third column.
+ *
+ * @param {string} input
+ * @param {string} recordDelimiter
+ * @param {string} fieldDelimiter
+ * @param {boolean} columnHeadingsAreIncluded - whether we should skip the first record
+ * @returns {Object[]}
+ */
+export function getScatterValuesWithColour(input, recordDelimiter, fieldDelimiter, columnHeadingsAreIncluded) {
+    let { headings, values } = getValues(
+        input,
+        recordDelimiter, fieldDelimiter,
+        columnHeadingsAreIncluded,
+        3
+    );
+
+    if (headings) {
+        headings = {x: headings[0], y: headings[1]};
+    }
+
+    values = values.map(row => {
+        const x = parseFloat(row[0], 10),
+            y = parseFloat(row[1], 10),
+            colour = row[2];
+
+        if (Number.isNaN(x)) throw new OperationError("Values must be numbers in base 10.");
+        if (Number.isNaN(y)) throw new OperationError("Values must be numbers in base 10.");
+
+        return [x, y, colour];
+    });
+
+    return { headings, values };
+}
+
+/**
+ * Gets values from input for a time series plot.
+ *
+ * @param {string} input
+ * @param {string} recordDelimiter
+ * @param {string} fieldDelimiter
+ * @param {boolean} columnHeadingsAreIncluded - whether we should skip the first record
+ * @returns {Object[]}
+ */
+export function getSeriesValues(input, recordDelimiter, fieldDelimiter, columnHeadingsAreIncluded) {
+    const { values } = getValues(
+        input,
+        recordDelimiter, fieldDelimiter,
+        false,
+        3
+    );
+
+    let xValues = new Set();
+    const series = {};
+
+    values.forEach(row => {
+        const serie = row[0],
+            xVal = row[1],
+            val = parseFloat(row[2], 10);
+
+        if (Number.isNaN(val)) throw new OperationError("Values must be numbers in base 10.");
+
+        xValues.add(xVal);
+        if (typeof series[serie] === "undefined") series[serie] = {};
+        series[serie][xVal] = val;
+    });
+
+    xValues = new Array(...xValues);
+
+    const seriesList = [];
+    for (const seriesName in series) {
+        const serie = series[seriesName];
+        seriesList.push({name: seriesName, data: serie});
+    }
+
+    return { xValues, series: seriesList };
+}