assets.js 2.88 KB
Newer Older
Athanasios's avatar
Athanasios committed
1
2
3
4
const fs = require("fs");
const boxIntersect = require("box-intersect");
const path = require('path');

Athanasios's avatar
Athanasios committed
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
const getLayers = (layers, boundingbox) => {
  if (boundingbox === undefined) {

    return new Promise((resolve, reject) => {
      fs.readFile("./assets/assets.json", (err, data) => {
        if (err) {
          reject();
        }
        let assets = JSON.parse(data);
        let requestedLayers = layers.split(",");
        assets = assets.filter(asset => requestedLayers.includes(asset.id));
        assets = assets.filter(asset => asset.scope == "public");
        resolve(assets);
      });
    });

  } else {

    return getIntersectingLayers(layers, boundingbox);

  }

}

const getIntersectingLayers = (layers,bb) => {
Athanasios's avatar
Athanasios committed
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

  return new Promise((resolve, reject) => {
    fs.readFile("./assets/assets.json", (err, data) => {
      if (err) {
        reject();
      }
      let assets = JSON.parse(data);
      let requestedBB = bb.split(",").map(token => parseFloat(token));
      let requestedLayers = layers.split(",");

      assets = assets.filter(asset => requestedLayers.includes(asset.id));
      assets = assets.filter(asset => asset.scope == "public");

      assets = assets.filter(asset => {

        let overlaps = boxIntersect([
          [...asset.boundingbox],
          [...requestedBB]
        ]);

        if (overlaps.length > 0) {
          return true;
        }
        return false;
      });

      resolve(assets);

    });
  });

}

const allLayersExist = (layers) => {

  if (!layers) return Promise.reject();

  return new Promise((resolve, reject) => {
    fs.readFile("./assets/assets.json", (err, data) => {
      if (err) {
        reject();
      }
      let assets = JSON.parse(data);
      layers = layers.split(",");
      layers.forEach(layer => {
        if (assets.findIndex(asset => asset.id == layer) == -1) {
          reject();
        }
      });
      resolve();
    });
  });

}

const getPublicLayers = () => {

  return new Promise((resolve, reject) => {
    fs.readFile("./assets/assets.json", (err, data) => {
      let assets = JSON.parse(data);
      assets = assets.filter(asset => asset.scope == "public");
      resolve(assets);
    });
  });

}

const isPublic = (url) => {

  return new Promise((resolve, reject) => {
    fs.readFile("./assets/assets.json", (err, data) => {
      let assets = JSON.parse(data);
      assets = assets.filter(asset => {
        let parentDir = path.dirname(asset.url);
Athanasios's avatar
Athanasios committed
104
        return !path.relative(parentDir, url).startsWith("..");
Athanasios's avatar
Athanasios committed
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
      });
      if (assets.length == 0) {
        resolve(false);
        return;
      }
      if (!assets[0].scope == "public") {
        resolve(false);
        return;
      }
      resolve(true);
    });
  });

}

Athanasios's avatar
Athanasios committed
120
module.exports = { getLayers, allLayersExist, getPublicLayers, isPublic };