WIP: Chart Events, Tooltips and Validation

packages/builder/src/components/userInterface/Chart.svelte

@@ -1,65 +1,123 @@
-<script>
-  import { onMount } from "svelte";
-
+<script context="module">
   //expose chart types for use or reference outside compnent
   export const chartTypes = britecharts ? Object.keys(britecharts) : null;
 
-  //TODO: How do I access this from outside the component?
   //expose chart color schemas for use or reference outside compnent
   export const colorSchemas = britecharts
     ? britecharts.colors.colorSchemas
     : null;
 
+  //export color gradients for use or reference outside the component
   export const colorGradients = britecharts
     ? britecharts.colors.colorGradients
     : null;
+</script>
+
+<script>
+  import { onMount } from "svelte";
 
   export let type = "bar";
   export let data = [];
+  export let tooltipProps = null;
 
-  export let colors = britecharts
-    ? britecharts.colors.colorSchemas.britecharts
-    : null;
+  export let colors = colorSchemas ? colorSchemas.britecharts : null;
+
+  export let gradients = colorGradients ? colorGradients.bluePurple : null;
 
   let chartElement = null;
   let chartContainer = null;
+  let tooltipContainer = null;
+
+  let tooltipElement = null;
 
   let chart = chartTypes.includes(type) ? britecharts[type]() : null;
+  export let tooltip = null; //can bind and therefore access
 
   onMount(() => {
-    //TODO: Error handling if can't find britecharts or d3Selection
     if (chart) {
       chartContainer = d3.select(chartElement);
       bindChartColors();
+      bindChartTooltip();
       bindChartUIProps();
+      bindChartEvents();
       chartContainer.datum(data).call(chart);
+    } else {
+      console.error("Britecharts could not be found");
     }
   });
 
   function bindChartColors() {
-    /* 
-    TODO: some charts support gradients, others support colours.Find out and cater for this here
-        Can a chart support support both color and gradient schemas?
-        Can a chart support no colors or gradients
-        Can a user define there own color schema? 
-    */
     if (chart.colorSchema) {
       chart.colorSchema(colors);
+    } else if (chart.gradient) {
+      chart.gradient(gradients);
+    }
+  }
+
+  function bindChartTooltip() {
+    if (canUseTooltip) {
+      tooltip = britecharts.tooltip();
+
+      const validTooltipProps = Object.getOwnPropertyNames(tooltip);
+
+      const props = Object.entries(tooltipProps);
+      for (let [key, value] of props) {
+        if (validTooltipProps.includes(key)) {
+          tooltip[key](value);
+        }
+      }
+
+      tooltipContainer = d3.select(tooltipElement);
+      tooltipContainer.datum([]).call(tooltip);
+    }
+  }
+
+  function excludeProps(props, propsToExclude) {
+    const modifiedProps = {};
+    for (const prop in props) {
+      if (!propsToExclude.includes(prop)) {
+        modifiedProps[prop] = props[prop];
+      }
+    }
+    return modifiedProps;
+  }
+
+  function bindChartEvents() {
+    if ($$props.on) {
+      const events = Object.entries($$props.on);
+      for (let [type, fn] of events) {
+        chart.on(type, fn);
+      }
     }
   }
 
-  //TODO: Ability to match height and width of container (similar to how this is done in docs). Maybe default this if no width or height
   function bindChartUIProps() {
-    const props = Object.entries($$props);
+    const props = Object.entries(
+      excludeProps($$props, ["data", "colors", "type", "gradients", "on"])
+    );
+
+    if (!props.includes("width")) {
+      chart.width(chartElement.getBoundingClientRect().width);
+    }
 
     for (let [prop, value] of props) {
       if (validChartProps.includes(prop)) {
         chart[prop](value);
+      } else {
+        console.warn(
+          `${type} chart - ${prop} is an unrecognised prop and wont be applied`
+        );
       }
     }
   }
 
   $: validChartProps = chart ? Object.getOwnPropertyNames(chart) : null;
+  $: canUseTooltip = type === "groupedBar" && tooltipProps;
+  $: console.log("VALID CHART PROPS", validChartProps);
 </script>
 
 <div bind:this={chartElement} class="chart-container" />
+
+{#if canUseTooltip}
+  <div bind:this={tooltipElement} class="tooltip-container" />
+{/if}