Plugin for vuex doesn't work

Question

My goal:

I wont to create plugin that will setup header with token for all requests.

Problem:

Plugin doesn't work.

Comments:

Plugin should be added to the storage module. (May be it matters something in this case. I don't know)

Plugin code:

export default function(store){
    store.subscribe((mutation, state) => {

        if(mutation.type === "GetToken"){

            console.log('TOKEN: ' + state.token);

            Vue.http.interceptors.push((request, next) => {

                request.headers.set('Authorization', 'Bearer ' +state.token);
                next();

            });

        }

    });
}

storage code:

import AuthenticationPlugin from "../plugins/authorization"
export default {

    namespaced: true,

    plugins: [AuthenticationPlugin],

    state:{
        token: null,
        email: null,
        signinResponse:{
            ok:         null,
            status:     null,
            statusText: null,
            url:        null,
            data:       null,
        },
    },

    getters:{
        userToken(state){
            return state.token;
        },
        userSigninResponseOk(state){
            return state.signinResponse.ok;
        },
        userSigninResponseStatus(state){
            return state.signinResponse.status;
        },
        userSigninResponseStatusText(state){
            return state.signinResponse.statusText;
        },
        userSigninResponseUrl(state){
            return state.signinResponse.url;
        },
        userSigninResponseData(state){
            return state.signinResponse.data;
        },
    },

    mutations:{
        GetToken(state, credentials){

            let c = credentials;
            let s = state;

            s.email       = c.email;

            Vue.http.post('api/admin/signin', {
                'email':    c.email ,
                'password': c.password,
            }).then(response=>{

                let r = response,
                    d = r.data,
                    s = state,
                    sr= s.signinResponse;

                s.token       = d.hasOwnProperty('token') ? d.token : null;
                sr.ok         = r.ok;
                sr.status     = r.status;
                sr.statusText = r.statusText;
                sr.url        = r.url;
                sr.data       = r.data;

            }, response=>{

                let r = response,
                    d = r.data,
                    s = state,
                    sr= s.signinResponse;

                sr.token      = null;
                sr.ok         = r.ok;
                sr.status     = r.status;
                sr.statusText = r.statusText;
                sr.url        = r.url;
                sr.data       = r.data;

            });

        }
    },

    actions:{
        GetToken(context, credentials){
            context.commit('GetToken', credentials);
        }
    },

}

Answer 1

If you want listen to module mutations, you must call mutation with module register name. And i don't know the plugin can inject at module, so i think plugin should inject to in store.js file

My

import ObservePlugin from "./ObservePlugin";

Vue.use(Vuex);

export default new Vuex.Store({
...
    modules: {
        'sampleModule': SampleModule
    }
    plugins :[
        ObservePlugin
    ]
})

Subscribe for namespaced module mutation:

store.subscribe((mutation, state) => {
    if(mutation.type === 'sampleModule/mutationName') {
        console.log(mutation)
    }
})