summaryrefslogtreecommitdiffstats
path: root/server/lib/permissions/permissionhelper.js
blob: 5185a6242f780f7226b786fb6558186dc80df9af (plain) (blame)
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
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
/* global __appdir */
const path = require('path')
var db = require(path.join(__appdir, 'lib', 'sequelize'))
var groupHelper = require(path.join(__appdir, 'lib', 'grouphelper'))

module.exports = { exportFunctions }

function exportFunctions (req, res, next) {
  req.user.hasPermission = permissionName => hasPermission(req.user.id, permissionName)
  req.user.getAllowedGroups = permissionName => getAllowedGroups(req.user.id, permissionName)
  req.user.hasPermissionForGroup = (permissionName, groupId) => hasPermissionForGroup(req.user.id, permissionName, groupId)
  req.user.getAllowedClients = permissionName => getAllowedClients(req.user.id, permissionName)
  req.user.hasPermissionForClient = (permissionName, clientId) => hasPermissionForClient(req.user.id, permissionName, clientId)
  req.user.getAllowedChilds = (permissionName, groupIds) => getAllowedChilds(req.user.id, permissionName, groupIds)
  next()
}

async function isSuperadmin (userid) {
  var user = await db.user.findOne({
    where: { id: userid, '$roles.permissions.name$': 'superadmin' },
    include: [{ as: 'roles', model: db.role, include: ['permissions'] }]
  })
  return user !== null
}

// Check if the user has given permission.
async function hasPermission (userid, permissionName) {
  var superAdmin = await isSuperadmin(userid)
  if (superAdmin) return true
  var permission = permissionName.split('.')
  // Wildcards
  var user
  if (permission[1] === '*') {
    user = await db.user.findOne({
      where: { id: userid, '$roles.permissions.name$': { [db.Op.like]: permission[0] + '%' } },
      include: [{ as: 'roles', model: db.role, include: ['permissions'] }]
    })
  } else {
    user = await db.user.findOne({
      where: { id: userid, '$roles.permissions.name$': permissionName },
      include: [{ as: 'roles', model: db.role, include: ['permissions'] }]
    })
  }
  return user !== null
}

// Get a list of GroupIDs the user has the given permission for. 0 means for all groups.
async function getAllowedGroups (userid, permissionName) {
  var superAdmin = await isSuperadmin(userid)
  if (superAdmin) return [0]
  var user = await db.user.findOne({
    where: { id: userid, '$roles.permissions.name$': permissionName },
    include: [{ as: 'roles', model: db.role, include: ['permissions', 'groups'] }]
  })
  // User doesn't have the permission
  if (user === null) return []
  // User has permission, permission is not groupdependent
  else if (!user.roles[0].permissions[0].groupdependent) return [0]
  // User has permission, permission is groupdependent
  else {
    var result = []
    for (let i = 0; i < user.roles.length; i++) {
      var whitelist = []
      var blacklist = []
      // Fill in white- and blacklist
      for (let j = 0; j < user.roles[i].groups.length; j++) {
        if (user.roles[i].groups[j].role_x_group.blacklist) {
          blacklist.push(user.roles[i].groups[j])
        } else {
          whitelist.push(user.roles[i].groups[j])
        }
      }

      // Get childs of whitelist groups, filtered by blacklist
      var whitelistChilds = await groupHelper.getAllChildren(whitelist, blacklist)
      result = result.concat(whitelist)
      result = result.concat(whitelistChilds.subgroups)
    }
    // Filter result for unique entries
    const filteredGroups = []
    const groupMap = new Map()
    for (const item of result) {
      if (!groupMap.has(item.id)) {
        groupMap.set(item.id, true)
        filteredGroups.push(item)
      }
    }
    result = filteredGroups
    return result
  }
}

// Check if the user has a given permission for a given group.
async function hasPermissionForGroup (userid, permissionName, groupId) {
  var superAdmin = await isSuperadmin(userid)
  if (superAdmin) return true
  var user = await db.user.findOne({
    where: { id: userid, '$roles.permissions.name$': permissionName },
    include: [{ as: 'roles', model: db.role, include: ['permissions', 'groups'] }]
  })
  // User doesn't have permission
  if (user === null) return false
  // User has permission, permission is not groupdependent
  else if (!user.roles[0].permissions[0].groupdependent) return true
  // User has permission, permission is groupdependent, check for group
  else {
    for (let i = 0; i < user.roles.length; i++) {
      var whitelist = []
      var blacklist = []
      var blacklistBreak = false
      // Fill in white- and blacklist
      for (let j = 0; j < user.roles[i].groups.length; j++) {
        if (user.roles[i].groups[j].role_x_group.blacklist) {
          // Shortcut, check next role
          if (user.roles[i].groups[j].id === groupId) {
            blacklistBreak = true
            break
          }
          blacklist.push(user.roles[i].groups[j].id)
        } else {
          // Shortcut
          if (user.roles[i].groups[j].id === groupId) return true
          whitelist.push(user.roles[i].groups[j].id)
        }
      }
      // Break by blacklist, do not check parents
      if (blacklistBreak) continue

      // Check parents for white-/blacklist entries
      let result = await checkParents(groupId, whitelist, blacklist)
      if (result) return true
    }
    return false
  }
}

// Get a list of ClientIDs the user has the given permission for. 0 means for all clients.
async function getAllowedClients (userid, permissionName) {
  var superAdmin = await isSuperadmin(userid)
  if (superAdmin) return [0]
  var user = await db.user.findOne({
    where: { id: userid, '$roles.permissions.name$': permissionName },
    include: [{ as: 'roles', model: db.role, include: ['permissions', { as: 'groups', model: db.group, include: ['clients'] }] }]
  })
  // User doesn't have the permission
  if (user === null) return []
  // User has permission, permission is not groupdependent
  else if (!user.roles[0].permissions[0].groupdependent) return [0]
  // User has permission, permission is groupdependent
  else {
    var result = []
    for (let i = 0; i < user.roles.length; i++) {
      var whitelist = []
      var blacklist = []
      // Fill in white- and blacklist
      for (let j = 0; j < user.roles[i].groups.length; j++) {
        if (user.roles[i].groups[j].role_x_group.blacklist) {
          blacklist.push(user.roles[i].groups[j])
        } else {
          whitelist.push(user.roles[i].groups[j])
        }
      }

      // Get childs of whitelist groups, filtered by blacklist
      var whitelistChilds = await groupHelper.getAllChildren(whitelist, blacklist)
      result = result.concat(whitelistChilds.clients)
    }
    // Filter result for unique entries
    const filteredClients = []
    const clientMap = new Map()
    for (const item of result) {
      if (!clientMap.has(item.id)) {
        clientMap.set(item.id, true)
        filteredClients.push(item)
      }
    }
    result = filteredClients
    return result
  }
}

// Check if the user has a given permission for a given client.
async function hasPermissionForClient (userid, permissionName, clientId) {
  var superAdmin = await isSuperadmin(userid)
  if (superAdmin) return true
  var user = await db.user.findOne({
    where: { id: userid, '$roles.permissions.name$': permissionName },
    include: [{ as: 'roles', model: db.role, include: ['permissions', { as: 'groups', model: db.group, include: ['clients'] }] }]
  })
  // User doesn't have permission
  if (user === null) return false
  // User has permission, permission is not groupdependent
  else if (!user.roles[0].permissions[0].groupdependent) return true
  // User has permission, permission is groupdependent, check for client
  else {
    for (let i = 0; i < user.roles.length; i++) {
      var whitelist = []
      var blacklist = []
      var blacklistBreak = false
      var result = false
      // Fill in white- and blacklist
      for (let j = 0; j < user.roles[i].groups.length; j++) {
        var clients = user.roles[i].groups[j].clients.map(c => c.id)
        if (user.roles[i].groups[j].role_x_group.blacklist) {
          // Shortcut
          if (clients.includes(clientId)) {
            blacklistBreak = true
            break
          }
          blacklist.push(user.roles[i].groups[j].id)
        } else {
          // Remember it was found, check if client is in any blacklisted group on same layer tho.
          if (clients.includes(clientId)) result = true
          whitelist.push(user.roles[i].groups[j].id)
        }
      }
      if (blacklistBreak) continue
      // no blacklist shortcut used, but whitelist found
      if (result) return true
      // Get groups the client is assigned to
      var client = await db.client.findOne({
        where: { id: clientId },
        include: [{ as: 'groups', model: db.group }]
      })
      var groupIds = client.groups.map(g => g.id)

      // Check parents for white-/blacklist entries.
      result = await checkParents(groupIds, whitelist, blacklist)
      if (result) return true
    }
    return false
  }
}

// Check if parents of groupIds are in the whitelist / blacklist
// Whitelist returns true, blacklist or no parent in either list returns false
async function checkParents (groupIds, whitelist, blacklist, knownGrps = []) {
  // No whitelist means the group can't be in one
  if (whitelist.length === 0) return false

  var result = false
  var parentIds = []
  var groups = await db.group.findAll({ where: { id: groupIds }, include: ['parents'] })

  for (let i = 0; i < groups.length; i++) {
    for (let j = 0; j < groups[i].parents.length; j++) {
      var id = groups[i].parents[j].id

      if (knownGrps.includes(id)) continue

      // Parent is blacklisted
      if (blacklist.includes(id)) return false
      // Parent is whitelisted, continue loop to see if another parent on SAME LAYER is blacklisted, as blacklisted > whitelisted
      if (whitelist.includes(id)) result = true
      parentIds.push(id)
      knownGrps.push(id)
    }
  }

  // A parent is whitelisted
  if (result) return true

  // No further parents found
  if (parentIds.length === 0) return false

  // Check next layer of parents
  result = await checkParents(parentIds, whitelist, blacklist, knownGrps)
  return result
}

async function getAllowedChilds (userid, permissionName, groupIds) {
  if (Number.isInteger(groupIds) && !Array.isArray(groupIds)) groupIds = [groupIds]

  var superAdmin = await isSuperadmin(userid)
  if (superAdmin) return groupHelper.getAllChildrenByIds(groupIds, {}, {})

  var user = await db.user.findOne({
    where: { id: userid, '$roles.permissions.name$': permissionName },
    include: [{ as: 'roles', model: db.role, include: ['permissions', 'groups'] }]
  })

  // User doesn't have the permission
  if (user === null) return {}

  // User has permission, permission is not groupdependent
  else if (!user.roles[0].permissions[0].groupdependent) return groupHelper.getAllChildrenByIds(groupIds, {}, {})

  // User has permission, permission is groupdependent
  else {
    var subgroups = []
    var clients = []
    var groupList = []

    for (let j = 0; j < groupIds.length; j++) {
      if (await hasPermissionForGroup(userid, permissionName, groupIds[j])) groupList.push(groupIds[j])
    }

    var allChilds = await groupHelper.getAllChildrenByIds(groupIds, {}, {})

    for (let i = 0; i < user.roles.length; i++) {
      var roleWhitelist = []
      var roleBlacklistMap = {}
      var roleGroupList = groupList

      for (let j = 0; j < user.roles[i].groups.length; j++) {
        if (user.roles[i].groups[j].role_x_group.blacklist) {
          roleBlacklistMap[user.roles[i].groups[j].id] = true
        } else {
          roleWhitelist.push(user.roles[i].groups[j])
        }
      }

      // TODO: This is just overwhelming inefficient. Even if whitelist contains only a few ids, if the function is called for the root, allChilds are 18k+ ids.
      for (let j = 0; j < roleWhitelist.length; j++) {
        for (let k = 0; k < allChilds.subgroups.length; k++) {
          if (allChilds.subgroups[k].id === roleWhitelist[j].id) {
            roleGroupList.push(roleWhitelist[j].id)
            subgroups = subgroups.concat(roleWhitelist[j])
          }
        }
      }

      var childs = await groupHelper.getAllChildrenByIds(roleGroupList, roleBlacklistMap, {})
      subgroups = subgroups.concat(childs.subgroups)
      clients = clients.concat(childs.clients)
    }

    // Filter result for unique entries
    const filteredGroups = []
    const groupMap = new Map()
    for (const item of subgroups) {
      if (!groupMap.has(item.id)) {
        groupMap.set(item.id, true)
        filteredGroups.push(item)
      }
    }
    subgroups = filteredGroups

    const filteredClients = []
    const clientMap = new Map()
    for (const item of clients) {
      if (!clientMap.has(item.id)) {
        clientMap.set(item.id, true)
        filteredClients.push(item)
      }
    }
    clients = filteredClients

    return { subgroups, clients }
  }
}