1 files changed, 140 insertions, 0 deletions
diff --git a/app/assets/javascripts/pipelines/components/graph_shared/links_inner.vue b/app/assets/javascripts/pipelines/components/graph_shared/links_inner.vue
new file mode 100644
index 00000000000..89444076ae0
--- /dev/null
+++ b/app/assets/javascripts/pipelines/components/graph_shared/links_inner.vue
@@ -0,0 +1,140 @@
+<script>
+import { isEmpty } from 'lodash';
+import { DRAW_FAILURE } from '../../constants';
+import { createJobsHash, generateJobNeedsDict } from '../../utils';
+import { parseData } from '../parsing_utils';
+import { generateLinksData } from './drawing_utils';
+
+export default {
+  name: 'LinksInner',
+  STROKE_WIDTH: 2,
+  props: {
+    containerId: {
+      type: String,
+      required: true,
+    },
+    containerMeasurements: {
+      type: Object,
+      required: true,
+    },
+    pipelineId: {
+      type: Number,
+      required: true,
+    },
+    pipelineData: {
+      type: Array,
+      required: true,
+    },
+    defaultLinkColor: {
+      type: String,
+      required: false,
+      default: 'gl-stroke-gray-200',
+    },
+    highlightedJob: {
+      type: String,
+      required: false,
+      default: '',
+    },
+  },
+  data() {
+    return {
+      links: [],
+      needsObject: null,
+    };
+  },
+  computed: {
+    hasHighlightedJob() {
+      return Boolean(this.highlightedJob);
+    },
+    isPipelineDataEmpty() {
+      return isEmpty(this.pipelineData);
+    },
+    highlightedJobs() {
+      // If you are hovering on a job, then the jobs we want to highlight are:
+      // The job you are currently hovering + all of its needs.
+      return this.hasHighlightedJob
+        ? [this.highlightedJob, ...this.needsObject[this.highlightedJob]]
+        : [];
+    },
+    highlightedLinks() {
+      // If you are hovering on a job, then the links we want to highlight are:
+      // All the links whose `source` and `target` are highlighted jobs.
+      if (this.hasHighlightedJob) {
+        const filteredLinks = this.links.filter((link) => {
+          return (
+            this.highlightedJobs.includes(link.source) && this.highlightedJobs.includes(link.target)
+          );
+        });
+
+        return filteredLinks.map((link) => link.ref);
+      }
+
+      return [];
+    },
+    viewBox() {
+      return [0, 0, this.containerMeasurements.width, this.containerMeasurements.height];
+    },
+  },
+  watch: {
+    highlightedJob() {
+      // On first hover, generate the needs reference
+      if (!this.needsObject) {
+        const jobs = createJobsHash(this.pipelineData);
+        this.needsObject = generateJobNeedsDict(jobs) ?? {};
+      }
+    },
+    highlightedJobs(jobs) {
+      this.$emit('highlightedJobsChange', jobs);
+    },
+  },
+  mounted() {
+    if (!isEmpty(this.pipelineData)) {
+      this.prepareLinkData();
+    }
+  },
+  methods: {
+    isLinkHighlighted(linkRef) {
+      return this.highlightedLinks.includes(linkRef);
+    },
+    prepareLinkData() {
+      try {
+        const arrayOfJobs = this.pipelineData.flatMap(({ groups }) => groups);
+        const parsedData = parseData(arrayOfJobs);
+        this.links = generateLinksData(parsedData, this.containerId, `-${this.pipelineId}`);
+      } catch {
+        this.$emit('error', DRAW_FAILURE);
+      }
+    },
+    getLinkClasses(link) {
+      return [
+        this.isLinkHighlighted(link.ref) ? 'gl-stroke-blue-400' : this.defaultLinkColor,
+        { 'gl-opacity-3': this.hasHighlightedJob && !this.isLinkHighlighted(link.ref) },
+      ];
+    },
+  },
+};
+</script>
+<template>
+  <div class="gl-display-flex gl-relative">
+    <svg
+      id="link-svg"
+      class="gl-absolute"
+      :viewBox="viewBox"
+      :width="`${containerMeasurements.width}px`"
+      :height="`${containerMeasurements.height}px`"
+    >
+      <template>
+        <path
+          v-for="link in links"
+          :key="link.path"
+          :ref="link.ref"
+          :d="link.path"
+          class="gl-fill-transparent gl-transition-duration-slow gl-transition-timing-function-ease"
+          :class="getLinkClasses(link)"
+          :stroke-width="$options.STROKE_WIDTH"
+        />
+      </template>
+    </svg>
+    <slot></slot>
+  </div>
+</template>