copy helper functions from CollaboratorsHandler

services/web/app/coffee/Features/Collaborators/CollaboratorsInviteHandler.coffee

@@ -1,5 +1,85 @@
+UserCreator = require('../User/UserCreator')
+Project = require("../../models/Project").Project
+mimelib = require("mimelib")
+logger = require('logger-sharelatex')
+UserGetter = require "../User/UserGetter"
+ContactManager = require "../Contacts/ContactManager"
+CollaboratorsEmailHandler = require "./CollaboratorsEmailHandler"
+Async = require "async"
+PrivilegeLevels = require "../Authorization/PrivilegeLevels"
+Errors = require "../Errors/Errors"
+
 module.experts = CollaboratorsInviteHandler =
 
+	# helpers
+	getMemberIdsWithPrivilegeLevels: (project_id, callback = (error, members) ->) ->
+		Project.findOne { _id: project_id }, { owner_ref: 1, collaberator_refs: 1, readOnly_refs: 1 }, (error, project) ->
+			return callback(error) if error?
+			return callback new Errors.NotFoundError("no project found with id #{project_id}") if !project?
+			members = []
+			members.push { id: project.owner_ref.toString(), privilegeLevel: PrivilegeLevels.OWNER }
+			for member_id in project.readOnly_refs or []
+				members.push { id: member_id.toString(), privilegeLevel: PrivilegeLevels.READ_ONLY }
+			for member_id in project.collaberator_refs or []
+				members.push { id: member_id.toString(), privilegeLevel: PrivilegeLevels.READ_AND_WRITE }
+			return callback null, members
+
+	getMemberIds: (project_id, callback = (error, member_ids) ->) ->
+		CollaboratorsInviteHandler.getMemberIdsWithPrivilegeLevels project_id, (error, members) ->
+			return callback(error) if error?
+			return callback null, members.map (m) -> m.id
+
+	getMembersWithPrivilegeLevels: (project_id, callback = (error, members) ->) ->
+		CollaboratorsInviteHandler.getMemberIdsWithPrivilegeLevels project_id, (error, members = []) ->
+			return callback(error) if error?
+			result = []
+			async.mapLimit members, 3,
+				(member, cb) ->
+					UserGetter.getUser member.id, (error, user) ->
+						return cb(error) if error?
+						if user?
+							result.push { user: user, privilegeLevel: member.privilegeLevel }
+						cb()
+				(error) ->
+					return callback(error) if error?
+					callback null, result
+
+	getMemberIdPrivilegeLevel: (user_id, project_id, callback = (error, privilegeLevel) ->) ->
+		# In future if the schema changes and getting all member ids is more expensive (multiple documents)
+		# then optimise this.
+		CollaboratorsInviteHandler.getMemberIdsWithPrivilegeLevels project_id, (error, members = []) ->
+			return callback(error) if error?
+			for member in members
+				if member.id == user_id?.toString()
+					return callback null, member.privilegeLevel
+			return callback null, PrivilegeLevels.NONE
+
+	getMemberCount: (project_id, callback = (error, count) ->) ->
+		CollaboratorsInviteHandler.getMemberIdsWithPrivilegeLevels project_id, (error, members) ->
+			return callback(error) if error?
+			return callback null, (members or []).length
+
+	getCollaboratorCount: (project_id, callback = (error, count) ->) ->
+		CollaboratorsInviteHandler.getMemberCount project_id, (error, count) ->
+			return callback(error) if error?
+			return callback null, count - 1 # Don't count project owner
+
+	isUserMemberOfProject: (user_id, project_id, callback = (error, isMember, privilegeLevel) ->) ->
+		CollaboratorsInviteHandler.getMemberIdsWithPrivilegeLevels project_id, (error, members = []) ->
+			return callback(error) if error?
+			for member in members
+				if member.id.toString() == user_id.toString()
+					return callback null, true, member.privilegeLevel
+			return callback null, false, null
+
+	getProjectsUserIsCollaboratorOf: (user_id, fields, callback = (error, readAndWriteProjects, readOnlyProjects) ->) ->
+		Project.find {collaberator_refs:user_id}, fields, (err, readAndWriteProjects)=>
+			return callback(err) if err?
+			Project.find {readOnly_refs:user_id}, fields, (err, readOnlyProjects)=>
+				return callback(err) if err?
+				callback(null, readAndWriteProjects, readOnlyProjects)
+
+	# public functions
 	inviteToProject: (projectId, sendingUserId, email, priveleges, callback=(err,invite)->) ->
 
 	revokeInvite: (projectId, inviteId, callback=(err)->) ->