init

src/use-cases/task/models/step.test.ts

@@ -0,0 +1,91 @@
+import { describe, expect, it } from 'vitest'
+import { Step } from '@/use-cases/task/models/step'
+import { faker } from '@faker-js/faker'
+import type { Stepable } from '@/use-cases/task/interfaces/stepable'
+
+const createStep = (partialStep?: Partial<Stepable>) =>
+  new Step(
+    partialStep?.id ?? faker.datatype.uuid(),
+    partialStep?.title ?? faker.animal.bird(),
+    partialStep?.estimation
+  )
+
+describe('Step', () => {
+  it('adds substeps', () => {
+    const step = createStep()
+
+    step.addSteps(createStep())
+
+    expect(step.steps.length).toEqual(1)
+  })
+
+  it('removes substeps', () => {
+    const step = createStep()
+    step.addSteps(createStep())
+
+    step.removeStep(0)
+
+    expect(step.steps.length).toEqual(0)
+  })
+
+  it('tells the estimation based on the sum of its substeps', () => {
+    const step = createStep()
+      .addSteps(
+        createStep({
+          estimation: 1
+        })
+      )
+      .addSteps(
+        createStep({
+          estimation: 2
+        })
+      )
+      .addSteps(
+        createStep({
+          estimation: 3
+        })
+      )
+
+    expect(step.totalEstimation).toBe(6)
+  })
+
+  it('tells the total estimation if the step estimation is set even with substeps', () => {
+    const step = createStep({
+      estimation: 8
+    })
+      .addSteps(
+        createStep({
+          estimation: 1
+        })
+      )
+      .addSteps(
+        createStep({
+          estimation: 2
+        })
+      )
+
+    expect(step.totalEstimation).toEqual(8)
+  })
+
+  it('flattens the substeps', () => {
+    const leafs = [
+      createStep({
+        id: 'leaf-1'
+      }),
+      createStep({
+        id: 'leaf-2'
+      }),
+      createStep({
+        id: 'leaf-3'
+      })
+    ]
+
+    const step = createStep().addSteps(
+      createStep().addSteps(leafs[0], leafs[1]),
+      createStep().addSteps(createStep().addSteps(leafs[2]))
+    )
+    const steps = Step.getStepLeafs([step])
+
+    expect(steps).toEqual(leafs)
+  })
+})

src/use-cases/task/models/step.ts

@@ -0,0 +1,51 @@
+import type { Stepable } from '@/use-cases/task/interfaces/stepable'
+
+export class Step implements Stepable {
+  private _steps: Step[] = []
+
+  constructor(
+    readonly id: string,
+    readonly title: string,
+    readonly estimation?: number
+  ) {
+    return this
+  }
+
+  public get steps() {
+    return this._steps
+  }
+
+  public addSteps(...steps: Stepable[]) {
+    this._steps.push(...Step.fromStepable(...steps))
+    return this
+  }
+
+  public removeStep(index: number) {
+    if (index < 0 || index >= this._steps.length) {
+      return
+    }
+
+    this._steps.splice(index)
+  }
+
+  public get totalEstimation(): number {
+    return (
+      this.estimation ??
+      this._steps.reduce((acc, step) => acc + step.totalEstimation, 0)
+    )
+  }
+
+  public static fromStepable(...stepables: Stepable[]): Step[] {
+    return stepables.map((stepable) =>
+      new Step(stepable.id, stepable.title, stepable.estimation).addSteps(
+        ...Step.fromStepable(...stepable.steps)
+      )
+    )
+  }
+
+  public static getStepLeafs(steps: Stepable[]): Stepable[] {
+    return steps.flatMap((step) =>
+      step.steps.length > 0 ? Step.getStepLeafs(step.steps) : [step]
+    )
+  }
+}

src/use-cases/task/models/task.ts

@@ -0,0 +1,46 @@
+import type { Stepable } from '@/use-cases/task/interfaces/stepable'
+import type { Taskable } from '@/use-cases/task/interfaces/taskable'
+import { Step } from '@/use-cases/task/models/step'
+
+export class Task implements Taskable {
+  public steps: Step[] = []
+  public title = ''
+  public link: string | null = null
+
+  constructor(public readonly id: string) {}
+
+  public addSteps(...steps: Stepable[]) {
+    this.steps.push(...Step.fromStepable(...steps))
+    return this
+  }
+
+  public removeStep(index: number) {
+    if (index < 0) {
+      return this
+    }
+
+    if (index < this.steps.length) {
+      return this
+    }
+
+    this.steps.splice(index)
+    return this
+  }
+
+  public get flattenSteps() {
+    return this.steps
+  }
+
+  public static fromTaskable(taskable: Taskable) {
+    const task = new Task(taskable.id)
+    task.title = taskable.title
+    task.link = taskable.link
+    task.addSteps(...taskable.steps)
+
+    return task
+  }
+
+  public static validate(task: Taskable) {
+    return !!task.id && !!task.title && task.steps.length > 0
+  }
+}