1 files changed, 120 insertions, 0 deletions
diff --git a/web/src/containers/jobgraph/JobGraphDisplay.jsx b/web/src/containers/jobgraph/JobGraphDisplay.jsx
new file mode 100644
index 000000000..1fbcef332
--- /dev/null
+++ b/web/src/containers/jobgraph/JobGraphDisplay.jsx
@@ -0,0 +1,120 @@
+// Copyright 2022 Acme Gating, LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License"); you may
+// not use this file except in compliance with the License. You may obtain
+// a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+// WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
+// License for the specific language governing permissions and limitations
+// under the License.
+
+import React, { useState, useEffect} from 'react'
+import PropTypes from 'prop-types'
+import { connect } from 'react-redux'
+import * as d3 from 'd3'
+
+import { makeJobGraphKey, fetchJobGraphIfNeeded } from '../../actions/jobgraph'
+import { graphviz } from 'd3-graphviz'
+
+function makeDot(jobGraph) {
+  let ret = 'digraph job_graph {'
+  ret += '  rankdir=LR;\n'
+  ret += '  node [shape=box];\n'
+  jobGraph.forEach((job) => {
+    if (job.dependencies.length) {
+      job.dependencies.forEach((dep) => {
+        let soft = ' [dir=back]'
+        if (dep.soft) {
+          soft = ' [style=dashed dir=back]'
+        }
+        ret += '  "' + dep.name + '" -> "' + job.name + '"' + soft + ';\n'
+      })
+    } else {
+      ret += '  "' + job.name + '";\n'
+    }
+  })
+  ret += '}\n'
+  return ret
+}
+
+function GraphViz(props) {
+  useEffect(() => {
+    const gv = graphviz('#graphviz')
+          .options({
+            fit: false,
+            zoom: true,
+            tweenPaths: false,
+            scale: 0.75,
+          }).renderDot(props.dot)
+
+    // Fix up the initial values of the internal transform data;
+    // without this the first time we pan the graph jumps.
+    const element = d3.select('.zuul-job-graph > svg')
+    const transform = element[0][0].firstElementChild.attributes.transform.value
+    const match = transform.match(/translate\(\d+,(\d+)\).*/)
+    if (match && match.length > 0) {
+      const val = parseInt(match[1])
+      gv._translation.y = val
+      gv._originalTransform.y = val
+    }
+  }, [props.dot])
+
+  return (
+    <div className="zuul-job-graph" id="graphviz"/>
+  )
+}
+
+GraphViz.propTypes = {
+  dot: PropTypes.string.isRequired,
+}
+
+function JobGraphDisplay(props) {
+  const [dot, setDot] = useState()
+  const {fetchJobGraphIfNeeded, tenant, project, pipeline, branch} = props
+
+  useEffect(() => {
+    fetchJobGraphIfNeeded(tenant, project.name, pipeline, branch)
+  }, [fetchJobGraphIfNeeded, tenant, project, pipeline, branch])
+
+  const tenantJobGraph = props.jobgraph.jobGraphs[props.tenant.name]
+  const jobGraphKey = makeJobGraphKey(props.project.name,
+                                      props.pipeline,
+                                      props.branch)
+  const jobGraph = tenantJobGraph ? tenantJobGraph[jobGraphKey] : undefined
+  useEffect(() => {
+    if (jobGraph) {
+      setDot(makeDot(jobGraph))
+    }
+  }, [jobGraph])
+  return (
+    <>
+      {dot && <GraphViz dot={dot}/>}
+    </>
+  )
+}
+
+JobGraphDisplay.propTypes = {
+  fetchJobGraphIfNeeded: PropTypes.func,
+  tenant: PropTypes.object,
+  project: PropTypes.object.isRequired,
+  pipeline: PropTypes.string.isRequired,
+  branch: PropTypes.string.isRequired,
+  jobgraph: PropTypes.object,
+  dispatch: PropTypes.func,
+  state: PropTypes.object,
+}
+function mapStateToProps(state) {
+  return {
+    tenant: state.tenant,
+    jobgraph: state.jobgraph,
+    state: state,
+  }
+}
+
+const mapDispatchToProps = { fetchJobGraphIfNeeded }
+
+export default connect(mapStateToProps, mapDispatchToProps)(JobGraphDisplay)