67 lines
1.4 KiB
JavaScript
67 lines
1.4 KiB
JavaScript
const _ = require('./lodash')
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const Graph = require('./graph')
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module.exports = {
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write: write,
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read: read
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}
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function write (g) {
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var json = {
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options: {
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directed: g.isDirected(),
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multigraph: g.isMultigraph(),
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compound: g.isCompound()
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},
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nodes: writeNodes(g),
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edges: writeEdges(g)
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}
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if (!_.isUndefined(g.graph())) {
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json.value = _.clone(g.graph())
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}
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return json
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}
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function writeNodes (g) {
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return _.map(g.nodes(), function (v) {
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const nodeValue = g.node(v)
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const parent = g.parent(v)
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const node = { v: v }
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if (!_.isUndefined(nodeValue)) {
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node.value = nodeValue
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}
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if (!_.isUndefined(parent)) {
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node.parent = parent
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}
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return node
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})
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}
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function writeEdges (g) {
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return _.map(g.edges(), function (e) {
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const edgeValue = g.edge(e)
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const edge = { v: e.v, w: e.w }
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if (!_.isUndefined(e.name)) {
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edge.name = e.name
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}
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if (!_.isUndefined(edgeValue)) {
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edge.value = edgeValue
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}
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return edge
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})
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}
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function read (json) {
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var g = new Graph(json.options).setGraph(json.value)
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_.each(json.nodes, function (entry) {
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g.setNode(entry.v, entry.value)
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if (entry.parent) {
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g.setParent(entry.v, entry.parent)
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}
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})
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_.each(json.edges, function (entry) {
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g.setEdge({ v: entry.v, w: entry.w, name: entry.name }, entry.value)
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})
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return g
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}
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