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template-html-diagram.html
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template-html-diagram.html
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<!doctype html>
<head>
<title>Mongo Schema</title>
<style>
svg {
background-color: white;
font-family: "Helvetic Neue", Helvetica, Arial, sans-serif;
font-size: small;
}
.node rect,
.node circle,
.node ellipse {
stroke: #333;
opacity: 0.8;
fill: #fff;
fill-opacity: 0.6;
}
.edgePath path {
stroke: #333;
fill: #333;
fill-opacity: 1;
stroke-opacity: 1;
}
.cluster {
stroke: #999;
fill: #888;
fill-opacity: 0.3;
stroke-opacity: 0.6;
}
.entity-name rect {
fill: #08f;
fill-opacity: 0.3;
}
</style>
</head>
<body>
<div class="background"></div>
<div class="container">
<svg></svg>
</div>
<canvas width="1024" height="1024" style="display:none"></canvas>
<script src="https://d3js.org/d3.v3.min.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/dagre-d3/0.4.17/dagre-d3.min.js"></script>
<script src="https://code.jquery.com/jquery-3.2.1.min.js" integrity="sha256-hwg4gsxgFZhOsEEamdOYGBf13FyQuiTwlAQgxVSNgt4=" crossorigin="anonymous"></script>
<script>
var drawERM = function(data) {
var width = window.innerWidth,
initialHeight = window.innerHeight,
svg = d3.select("body div.container svg"),
inner = svg.append("g");
svg.attr('width', width).attr('height', initialHeight);
var resizeGraph = function(doCenter) {
var newWidth = window.innerWidth;
var newHeight = window.innerHeight;
if(newWidth < g.graph().width + 40) {
newWidth = g.graph().width + 40;
}
if(newHeight < g.graph().height + 40) {
newHeight = g.graph().height + 40;
}
svg.attr('width', newWidth).attr('height', newHeight);
// Center the graph
if(doCenter) {
zoom
.translate([(svg.attr("width") - g.graph().width * initialScale) / 2, 20])
.scale(initialScale)
.event(svg);
}
}
// Set up zoom support
var zoom = d3.behavior.zoom().on("zoom", function() {
inner.attr("transform", "translate(" + d3.event.translate + ")" +
"scale(" + d3.event.scale + ")");
});
svg.call(zoom);
// create graph
var g = new dagreD3.graphlib.Graph({
multigraph: false,
compound: true
}).setGraph({
rankdir: "LR",
edgesep: 25,
nodesep: 0
});
var links = [];
var addField = function(collectionName, fieldName, fieldInfo, parentFieldName) {
var nodeName = parentFieldName ? collectionName + "_" + parentFieldName + "_" + fieldName : collectionName + "_" + fieldName;
g.setNode(nodeName, {
label: (parentFieldName ? parentFieldName + "." + fieldName : fieldName) + ": " + fieldInfo.type,
width: 300
});
g.setParent(nodeName, "___" + collectionName + "_container");
if(fieldInfo.foreignKey && fieldInfo.references) {
links.push({
from: nodeName,
to: fieldInfo.references + "__id"
});
}
if(fieldInfo.type == "Object" && fieldInfo.structure) {
for(var subFieldName in fieldInfo.structure) {
addField(collectionName, subFieldName, fieldInfo.structure[subFieldName], parentFieldName ? parentFieldName + "." + fieldName : fieldName);
}
}
};
var addCollection = function(collectionName, collectionInfo) {
g.setNode("___" + collectionName + "_container", {
label: ""
});
g.setNode("___" + collectionName + "_title", {
label: collectionName,
class: 'entity-name',
labelStyle: 'font-weight:bold;',
width: 300
});
g.setParent("___" + collectionName + "_title", "___" + collectionName + "_container");
for(var fieldName in collectionInfo) {
addField(collectionName, fieldName, collectionInfo[fieldName]);
}
};
for(var collectionName in data) {
addCollection(collectionName, data[collectionName]);
}
links.map(function(link) {
g.setEdge(link.from, link.to, {
label: '',
lineInterpolate: 'monotone'
});
});
// Create the renderer
var render = dagreD3.render();
// Run the renderer. This is what draws the final graph.
render(inner, g);
// adjust height
var initialScale = 1; //0.75;
window.addEventListener('resize', function () {
resizeGraph();
});
resizeGraph(true);
};
var data = {/*DATA_HERE*/};
drawERM(data);
$("canvas").attr("width", $("svg").width());
$("canvas").attr("height", $("svg").height());
var st = $(document.createElement("style"));
st.text("/* <![CDATA[ */" + $("style").text() + "/* ]]> */");
$("svg").append(st);
var html = d3.select("svg")
.attr("version", 1.1)
.attr("xmlns", "http://www.w3.org/2000/svg")
.node().parentNode.innerHTML;
var imgsrc = 'data:image/svg+xml;base64,'+ btoa(html);
var canvas = document.querySelector("canvas"),
context = canvas.getContext("2d");
var image = new Image;
image.src = imgsrc;
image.onload = function() {
context.drawImage(image, 0, 0);
var canvasdata = canvas.toDataURL("image/png");
var a = document.createElement("a");
a.download = "diagram.png";
a.href = canvasdata;
document.body.appendChild(a);
a.click();
};
</script>
</body>