| (function () { |
| 'use strict'; |
| |
| angular.module('xos.mcord-slicing') |
| .service('SliceGraph', function(_, NodePositioner){ |
| const g = new graphlib.Graph(); |
| |
| /** |
| * @ngdoc method |
| * @name xos.mcord-slicing.SliceGraph#buildGraph |
| * @methodOf xos.mcord-slicing.SliceGraph |
| * @description |
| * buildGraph |
| * @param {object} data An object in the for of {nodes: [], links: []} describing the graph |
| * @returns {null} |
| **/ |
| this.buildGraph = (data) => { |
| _.forEach(data.nodes, n => g.setNode(n.id, n)); |
| _.forEach(data.links, n => g.setEdge(n.source, n.target, n)); |
| }; |
| |
| this.getLinks = () => { |
| return g.edges().map(e => { |
| return { |
| source: g.node(e.v), |
| target: g.node(e.w), |
| data: g.edge(e) |
| } |
| }); |
| } |
| |
| this.getGraph = () => g; |
| |
| // find the successor of a node |
| this.getNodeSuccessors = (node) => { |
| return _.map(g.successors(node.id), n => { |
| return g.node(n); |
| }) |
| }; |
| |
| this.getNodePredecessors = (node) => { |
| return _.map(g.predecessors(node.id), n => { |
| return g.node(n); |
| }); |
| }; |
| |
| // get data plane successors of a node |
| this.getNodeDataPlaneSuccessors = (node) => { |
| return _.filter(this.getNodeSuccessors(node), n => { |
| return n.plane === 'data'; |
| }); |
| }; |
| |
| // find the end of the graph toward upstream |
| this.getUpstreamSinks = (el) => { |
| const sinks = _.reduce(g.sinks(), (sinks, node, i) => { |
| let n = g.node(node); |
| if(n.type === 'upstream'){ |
| sinks.push(n); |
| } |
| return sinks; |
| }, []); |
| |
| return _.map(sinks, (s, i) => { |
| s.position = { |
| top: 0, |
| bottom: el.clientHeight, |
| total: sinks.length, |
| index: i + 1 |
| }; |
| return s; |
| }) |
| }; |
| |
| this.positionGraph = (el) => { |
| // get root node |
| let nodes = this.getUpstreamSinks(el); |
| |
| // find children, recursively |
| let children = []; |
| _.forEach(nodes, (n, i) => { |
| children = children.concat(this.findPredecessor(n)); |
| }); |
| nodes = nodes.concat(children); |
| |
| // calculate the position for all nodes |
| nodes = _.map(nodes, r => { |
| return NodePositioner.getDataPlaneNodePos(r, el); |
| }); |
| |
| return nodes; |
| }; |
| |
| // this iterate on all the nodes, and add position information |
| this.findPredecessor = (node) => { |
| let preds = g.predecessors(node.id); |
| |
| // saving predecessor information |
| preds = preds.map((p, i) => { |
| p = g.node(p); |
| const parentAvailableSpace = (node.position.bottom - node.position.top) / node.position.total; |
| const parentY = NodePositioner.getVpos(node); |
| p.position = { |
| top: parentY - (parentAvailableSpace / 2), |
| bottom: (parentY + (parentAvailableSpace / 2)), |
| total: preds.length, |
| index: i + 1 |
| }; |
| return p; |
| }); |
| |
| //recurse |
| const predsChild = _.reduce(preds, (list, p) => { |
| return list.concat(this.findPredecessor(p)); |
| }, []); |
| |
| return preds.concat(predsChild); |
| }; |
| |
| this.getGraphLinks = (nodes) => { |
| const links = []; |
| _.forEach(nodes, n => { |
| const edges = g.inEdges(n.id); |
| _.forEach(edges, e => { |
| links.push({ |
| source: g.node(e.v), |
| target: g.node(e.w), |
| data: g.edge(e) |
| }); |
| }); |
| }); |
| return links; |
| }; |
| |
| this.getDataPlaneForSlice = (ranRu, sliceId) => { |
| // hardcoded, likely to be improved |
| const ranCu = g.node(g.successors(ranRu.id)[0]); |
| const sgw = g.node(g.successors(ranCu.id)[0]); |
| const pgw = g.node(g.successors(sgw.id)[0]); |
| |
| // augmenting nodes with sliceId |
| ranRu.sliceId = sliceId; |
| ranCu.sliceId = sliceId; |
| sgw.sliceId = sliceId; |
| pgw.sliceId = sliceId; |
| return [ranRu, ranCu, sgw, pgw]; |
| }; |
| |
| this.getControlPlaneForSlice = (dataPlane, sliceId) => { |
| return _.reduce(dataPlane, (cp_nodes, dp_node) => { |
| // NOTE: looks that all the time the cplane version of the node is successors number 1, we may need to check |
| let cp_node = g.node(g.successors(dp_node.id)[1]); |
| |
| // position relative to their data-plane node |
| cp_node = NodePositioner.getControlPlaneNodePos(cp_node, dp_node); |
| cp_node.sliceId = sliceId; |
| // hardcoded |
| // if control plane node is a sgw, there is an MME attached |
| if(cp_node.type === 'sgw'){ |
| let mme = g.node(g.successors(cp_node.id)[1]); |
| // position relative to their data-plane node |
| mme = NodePositioner.getControlPlaneNodePos(mme, cp_node); |
| mme.sliceId = sliceId; |
| cp_nodes.push(mme); |
| } |
| |
| return cp_nodes.concat(cp_node); |
| }, []); |
| }; |
| |
| this.activeSlices = []; |
| // this.usedSlicesId = []; |
| this.getSliceDetail= (node) => { |
| if(node.sliceId && this.activeSlices.indexOf(node.sliceId) > -1){ |
| // the slice is already active, return an empty set |
| return [[], []]; |
| } |
| |
| // let sliceId; |
| // if (node.sliceId){ |
| // sliceId = node.sliceId; |
| // } |
| // else{ |
| const sliceId = _.min(this.activeSlices) ? _.min(this.activeSlices) + 1 : 1; |
| // } |
| this.activeSlices.push(sliceId); |
| // this.usedSlicesId.push(sliceId); |
| |
| // getting the beginning of the slice |
| const ranRu = (function getRanRu(n) { |
| if(n.type === 'ran-ru'){ |
| return n; |
| } |
| // we assume that in the slice node have only one predecessor |
| const pred = g.predecessors(n.id); |
| return getRanRu(g.node(pred[0])); |
| })(node); |
| |
| // get data plane nodes for this slice (need them to get the corresponding control plane) |
| const dp_nodes = this.getDataPlaneForSlice(ranRu, sliceId); |
| // get control plane nodes for this slice |
| const cp_nodes = this.getControlPlaneForSlice(dp_nodes, sliceId); |
| |
| const links = this.getGraphLinks(cp_nodes); |
| |
| // add a close button |
| let closeButton = { |
| name: 'Close', |
| id: `close-button-${sliceId}`, |
| type: 'button', |
| sliceId: sliceId |
| }; |
| closeButton = NodePositioner.getControlPlaneNodePos(closeButton, cp_nodes[3]); |
| cp_nodes.push(closeButton); |
| |
| return [cp_nodes, links]; |
| }; |
| |
| this.removeActiveSlice = sliceId => { |
| // nodes are remove from the d3 nodes identified by id |
| this.activeSlices.splice(this.activeSlices.indexOf(sliceId), 1); |
| }; |
| |
| }) |
| .service('NodePositioner', function(_, sliceElOrder){ |
| |
| let el; |
| |
| this.storeEl = (_el) => { |
| el = _el; |
| }; |
| |
| this.getHpos = (node, el) => { |
| let elPos = sliceElOrder.indexOf(node.type) + 1; |
| |
| // hardcoded |
| if(node.type === 'mme'){ |
| elPos = sliceElOrder.indexOf('sgw') + 1 |
| } |
| if(node.type === 'button'){ |
| elPos = sliceElOrder.indexOf('pgw') + 1 |
| } |
| let x = (el.clientWidth / (sliceElOrder.length + 1)) * elPos; |
| return x; |
| }; |
| |
| this.getVpos = (node) => { |
| // calculate the available space to distribute items |
| const availableSpace = node.position.bottom - node.position.top; |
| |
| // calculate the distance between each item |
| const step = availableSpace / (node.position.total + 1); |
| |
| // vertical position |
| const y = (step * node.position.index) + node.position.top; |
| return y; |
| }; |
| |
| // for nodes that are part of the data plane |
| this.getDataPlaneNodePos = (node) => { |
| const x = this.getHpos(node, el); |
| const y = this.getVpos(node); |
| node.x = x; |
| node.y = y; |
| node.transform = `translate(${x}, ${y})`; |
| node.fixed = true; |
| return node; |
| }; |
| |
| // control element nodes are positioned relatively to their corresponding data plane node |
| this.getControlPlaneNodePos = (cp_node, dp_node) => { |
| const x = this.getHpos(cp_node, el); |
| const y = dp_node.y - 75; |
| cp_node.x = x; |
| cp_node.y = y; |
| cp_node.transform = `translate(${x}, ${y})`; |
| cp_node.fixed = true; |
| return cp_node; |
| }; |
| |
| }) |
| .value('sliceElOrder', [ |
| 'ue', |
| 'profile', |
| 'ran-ru', |
| 'ran-cu', |
| 'sgw', |
| 'pgw', |
| 'upstream' |
| ]); |
| })(); |