1  const state = []
 2  
 3  const mutations = {
 4      goGo(state, x){
 5          state.length = 0
 6          x.forEach(y => state.push(y))
 7          window.scrollTo(0, 0);
 8      },
 9      goDeeper(state, target){
10          let targetIndex = state.indexOf(target)
11          if (targetIndex === -1){
12              state.push(target)
13          } else if (targetIndex !== state.length - 1){
14              let swapy = state[state.length - 1]
15              state[state.length - 1] = target
16              state[targetIndex] = swapy
17          }
18          window.scrollTo(0, 0);
19      },
20      goHigher(state, tId){
21          let popped = false
22          let i = 0
23          popped, i
24          while(state[state.length - 1] !== tId && state.length !== 1) {
25              popped = state.pop()
26              i ++
27          }
28      },
29      addParent(state, tId){
30          let p = state.pop()
31          state.push(tId)
32          state.push(p)
33      },
34      applyEvent(state, ev){
35          if (ev.type === 'task-removed' && ev.taskId === state[state.length - 1]){
36              state.pop()
37          }
38          if (ev.type === 'member-purged' && ev.memberId === state[state.length - 1]){
39              state.pop()
40          }
41          if (state.length === 0){
42              state.push(ev.blame)
43          }
44      }
45  }
46  
47  const actions = {}
48  
49  const getters = {}
50  
51  export default {
52      state,
53      mutations,
54      actions,
55      getters,
56  }