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Preload labels and use locally stored in vuex

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This commit is contained in:
kolaente
2021-06-03 22:23:04 +02:00
parent e37145cd43
commit a9d3446ce3
8 changed files with 246 additions and 170 deletions
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110
src/views/list/views/List.vue
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@ -161,7 +161,6 @@
import TaskService from '../../../services/task'
import TaskModel from '../../../models/task'
import LabelTaskService from '../../../services/labelTask'
import LabelService from '../../../services/label'
import LabelTask from '../../../models/labelTask'
import LabelModel from '../../../models/label'
@ -186,7 +185,6 @@ export default {
showError: false,
labelTaskService: LabelTaskService,
labelService: LabelService,
ctaVisible: false,
}
@ -202,7 +200,6 @@ export default {
},
created() {
this.taskService = new TaskService()
this.labelService = new LabelService()
this.labelTaskService = new LabelTaskService()
// Save the current list view to local storage
@ -237,6 +234,40 @@ export default {
this.sortTasks()
this.newTaskText = ''
// Unlike a proper programming language, Javascript only knows references to objects and does not
// allow you to control what is a reference and what isnt. Because of this we can't just add
// all labels to the task they belong to right after we found and added them to the task since
// the task update method also ensures all data the api sees has the right format. That means
// it processes labels. That processing changes the date format and the label color and makes
// the label pretty much unusable for everything else. Normally, this is not a big deal, because
// the labels on a task get thrown away anyway and replaced with the new models from the api
// when we get the updated answer back. However, in this specific case because we're passing a
// label we obtained from vuex that reference is kept and not thrown away. The task itself gets
// a new label object - you won't notice the bad reference until you want to add the same label
// again and notice it doesn't have a color anymore.
// I think this is what happens: (or rather would happen without the hack I've put in)
// 1. Query the store for a label which matches the name
// 2. Find one - remember, we get only a *reference* to the label from the store, not a new label object.
// (Now there's *two* places with a reference to the same label object: in the store and in the
// variable which holds the label from the search in the store)
// 3. .push the label to the task
// 4. Update the task to remove the labels from the name
// 4.1. The task update processes all labels belonging to that task, changing attributes of our
// label in the process. Because this is a reference, it is also "updated" in the store.
// 5. Get an api response back. The service handler now creates a new label object for all labels
// returned from the api. It will throw away all references to the old label in the process.
// 6. Now we have two objects with the same label data: The old one we originally obtained from
// the store and the one that was created when parsing the api response. The old one was
// modified before sending the api request and thus, our store which still holds a reference
// to the old label now contains old data.
// I guess this is the point where normally the GC would come in and collect the old label
// object if the store wouldn't still hold a reference to it.
//
// Now, as a workaround, I'm putting all new labels added to that task in this separate variable to
// add them only after the task was updated to circumvent the task update service processing the
// label before sending it. Feels more hacky than it probably is.
const newLabels = []
// Check if the task has words starting with ~ in the title and make them to labels
const parts = task.title.split(' ~')
// The first element will always contain the title, even if there is no occurrence of ~
@ -271,17 +302,41 @@ export default {
}
// Check if the label exists
this.labelService.getAll({}, {s: labelTitle})
.then(res => {
// Label found, use it
if (res.length > 0 && res[0].title === labelTitle) {
const label = Object.values(this.$store.state.labels.labels).find(l => {
return l.title.toLowerCase() === labelTitle.toLowerCase()
})
// Label found, use it
if (typeof label !== 'undefined') {
const labelTask = new LabelTask({
taskId: task.id,
labelId: label.id,
})
this.labelTaskService.create(labelTask)
.then(result => {
newLabels.push(label)
// Remove the label text from the task title
task.title = task.title.replace(` ~${labelTitle}`, '')
// Make the promise done (the one with the index 0 does not exist)
labelAddings[index - 1].resolve(result)
})
.catch(e => {
this.error(e, this)
})
} else {
// label not found, create it
const label = new LabelModel({title: labelTitle})
this.$store.dispatch('labels/createLabel', label)
.then(res => {
const labelTask = new LabelTask({
taskId: task.id,
labelId: res[0].id,
labelId: res.id,
})
this.labelTaskService.create(labelTask)
.then(result => {
task.labels.push(res[0])
newLabels.push(res)
// Remove the label text from the task title
task.title = task.title.replace(` ~${labelTitle}`, '')
@ -292,37 +347,11 @@ export default {
.catch(e => {
this.error(e, this)
})
} else {
// label not found, create it
const label = new LabelModel({title: labelTitle})
this.labelService.create(label)
.then(res => {
const labelTask = new LabelTask({
taskId: task.id,
labelId: res.id,
})
this.labelTaskService.create(labelTask)
.then(result => {
task.labels.push(res)
// Remove the label text from the task title
task.title = task.title.replace(` ~${labelTitle}`, '')
// Make the promise done (the one with the index 0 does not exist)
labelAddings[index - 1].resolve(result)
})
.catch(e => {
this.error(e, this)
})
})
.catch(e => {
this.error(e, this)
})
}
})
.catch(e => {
this.error(e, this)
})
})
.catch(e => {
this.error(e, this)
})
}
})
// This waits to update the task until all labels have been added and the title has
@ -331,6 +360,7 @@ export default {
.then(() => {
this.taskService.update(task)
.then(updatedTask => {
updatedTask.labels = newLabels
this.updateTasks(updatedTask)
this.$store.commit(HAS_TASKS, true)
})