# All files / trustedApplications trustedApplications.utils.ts

100% Statements 13/13
100% Branches 0/0
100% Functions 6/6
100% Lines 13/13

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     import { BlankNode, IndexedFormula, NamedNode, st, Literal, sym, Statement } from 'rdflib'
    import { Namespaces } from 'solid-namespace'

    export function getStatementsToDelete (
      origin: NamedNode | Literal,
      person: NamedNode,
      kb: IndexedFormula,
      ns: Namespaces
    ): any {
      const applicationStatements = kb.statementsMatching(
        null,
        ns.acl('origin'),
        origin
      )
      const statementsToDelete = applicationStatements.reduce(
        (memo, st) => {
          return memo
            .concat(
              kb.statementsMatching(
                person,
                ns.acl('trustedApp'),
                st.subject as NamedNode
              )
            )
            .concat(kb.statementsMatching(st.subject))
        },
        [] as Array<Statement>
      )
      return statementsToDelete
    }

    export function getStatementsToAdd (
      origin: NamedNode,
      nodeName: string,
      modes: string[],
      person: NamedNode,
      ns: Namespaces
    ): any {
      const application = new BlankNode(`bn_${nodeName}`) // NamedNode(`${person.doc().uri}#${nodeName}`)
      return [
        st(person, ns.acl('trustedApp'), application, person.doc()),
        st(application, ns.acl('origin'), origin, person.doc()),
        ...modes
          .map(mode => sym(mode))
          .map(mode => st(application, ns.acl('mode'), mode, person.doc()))
      ]
    }

    export function generateRandomString () {
      return Math.random().toString(36).substr(2, 5)
    }