dgate 2.1.0

DGate API Gateway - High-performance API gateway with JavaScript module support
Documentation 
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132

import * as d3 from 'd3';
import * as _ from 'lodash-es';
import { intersectNode } from './intersect/intersect-node.js';
import * as util from './util.js';

export { createEdgePaths, setCreateEdgePaths };

var createEdgePaths = function (selection, g, arrows) {
  var previousPaths = selection
    .selectAll('g.edgePath')
    .data(g.edges(), function (e) {
      return util.edgeToId(e);
    })
    .classed('update', true);

  var newPaths = enter(previousPaths, g);
  exit(previousPaths, g);

  var svgPaths = previousPaths.merge !== undefined ? previousPaths.merge(newPaths) : previousPaths;
  util.applyTransition(svgPaths, g).style('opacity', 1);

  // Save DOM element in the path group, and set ID and class
  svgPaths.each(function (e) {
    var domEdge = d3.select(this);
    var edge = g.edge(e);
    edge.elem = this;

    if (edge.id) {
      domEdge.attr('id', edge.id);
    }

    util.applyClass(
      domEdge,
      edge['class'],
      (domEdge.classed('update') ? 'update ' : '') + 'edgePath'
    );
  });

  svgPaths.selectAll('path.path').each(function (e) {
    var edge = g.edge(e);
    edge.arrowheadId = _.uniqueId('arrowhead');

    var domEdge = d3
      .select(this)
      .attr('marker-end', function () {
        return 'url(' + makeFragmentRef(location.href, edge.arrowheadId) + ')';
      })
      .style('fill', 'none');

    util.applyTransition(domEdge, g).attr('d', function (e) {
      return calcPoints(g, e);
    });

    util.applyStyle(domEdge, edge.style);
  });

  svgPaths.selectAll('defs *').remove();
  svgPaths.selectAll('defs').each(function (e) {
    var edge = g.edge(e);
    var arrowhead = arrows[edge.arrowhead];
    arrowhead(d3.select(this), edge.arrowheadId, edge, 'arrowhead');
  });

  return svgPaths;
};

function setCreateEdgePaths(value) {
  createEdgePaths = value;
}

function makeFragmentRef(url, fragmentId) {
  var baseUrl = url.split('#')[0];
  return baseUrl + '#' + fragmentId;
}

function calcPoints(g, e) {
  var edge = g.edge(e);
  var tail = g.node(e.v);
  var head = g.node(e.w);
  var points = edge.points.slice(1, edge.points.length - 1);
  points.unshift(intersectNode(tail, points[0]));
  points.push(intersectNode(head, points[points.length - 1]));

  return createLine(edge, points);
}

function createLine(edge, points) {
  // @ts-expect-error
  var line = (d3.line || d3.svg.line)()
    .x(function (d) {
      return d.x;
    })
    .y(function (d) {
      return d.y;
    });

  (line.curve || line.interpolate)(edge.curve);

  return line(points);
}

function getCoords(elem) {
  var bbox = elem.getBBox();
  var matrix = elem.ownerSVGElement
    .getScreenCTM()
    .inverse()
    .multiply(elem.getScreenCTM())
    .translate(bbox.width / 2, bbox.height / 2);
  return { x: matrix.e, y: matrix.f };
}

function enter(svgPaths, g) {
  var svgPathsEnter = svgPaths.enter().append('g').attr('class', 'edgePath').style('opacity', 0);
  svgPathsEnter
    .append('path')
    .attr('class', 'path')
    .attr('d', function (e) {
      var edge = g.edge(e);
      var sourceElem = g.node(e.v).elem;
      var points = _.range(edge.points.length).map(function () {
        return getCoords(sourceElem);
      });
      return createLine(edge, points);
    });
  svgPathsEnter.append('defs');
  return svgPathsEnter;
}

function exit(svgPaths, g) {
  var svgPathExit = svgPaths.exit();
  util.applyTransition(svgPathExit, g).style('opacity', 0).remove();
}