Feat quests page (#67)

Feat quests page

packages/utils/dag.js

@@ -0,0 +1,73 @@
+export default class DAG {
+  #nodes = new Map()
+
+  #edges = new Set()
+
+  #layers = []
+
+  constructor(nodes) {
+    this.#nodes = new Map(nodes.map((node) => [node._id, node]))
+    this.#edges = new Set()
+    this.#nodes.forEach((_, id) => {
+      this.#setLayer(id)
+      this.#addEdges(id)
+    })
+  }
+
+  getNode(id) {
+    return this.#nodes.get(id)
+  }
+
+  getNodes() {
+    return Array.from(this.#nodes.values())
+  }
+
+  getEdges() {
+    return this.#edges
+  }
+
+  getEdgesArray() {
+    return Array.from(this.#edges.values())
+  }
+
+  getLayers() {
+    return this.#layers
+  }
+
+  getLayer(id) {
+    const node = this.getNode(id)
+    if (!node) {
+      throw new Error(`Node ${id} not found`)
+    }
+    return this.#layers[node.layer - 1]
+  }
+
+  #setLayer(id) {
+    const node = this.getNode(id)
+    if (!node) {
+      throw new Error(`Node ${id} not found`)
+    }
+    if (node.layer !== undefined) {
+      return node.layer
+    }
+    const previousLayer = node.requirements.map((rId) => this.#setLayer(rId))
+    node.layer = Math.max(...previousLayer, 0) + 1
+    if (this.#layers.length < node.layer) {
+      this.#layers.push(1)
+    } else {
+      this.#layers[node.layer - 1] += 1
+    }
+    node.index = this.#layers[node.layer - 1]
+    return node.layer
+  }
+
+  #addEdges(id) {
+    const node = this.getNode(id)
+    if (!node) {
+      throw new Error(`Node ${id} not found`)
+    }
+    node.requirements.forEach((rId) => {
+      this.#edges.add([rId, id])
+    })
+  }
+}

packages/utils/dag.test.js

@@ -0,0 +1,165 @@
+import DAG from './dag.js'
+
+describe('dag layers', () => {
+  it('two layer', () => {
+    const data = [
+      {
+        _id: 'helloworld',
+        requirements: [],
+      },
+      {
+        _id: 'spell',
+        requirements: ['helloworld'],
+      },
+    ]
+    const dag = new DAG(data)
+    expect(dag.getNode('helloworld').layer).toBe(1)
+    expect(dag.getNode('spell').layer).toBe(2)
+  })
+  it('branch', () => {
+    const data = [
+      {
+        _id: 'helloworld',
+        requirements: [],
+      },
+      {
+        _id: 'spell',
+        requirements: ['helloworld'],
+      },
+      {
+        _id: 'discover',
+        requirements: ['helloworld'],
+      },
+    ]
+    const dag = new DAG(data)
+    expect(dag.getNode('helloworld').layer).toBe(1)
+    expect(dag.getNode('spell').layer).toBe(2)
+    expect(dag.getNode('discover').layer).toBe(2)
+  })
+  it('merge', () => {
+    const data = [
+      {
+        _id: 'A',
+        requirements: [],
+      },
+      {
+        _id: 'B',
+        requirements: [],
+      },
+      {
+        _id: 'C',
+        requirements: ['A', 'B'],
+      },
+    ]
+    const dag = new DAG(data)
+    expect(dag.getNode('A').layer).toBe(1)
+    expect(dag.getNode('B').layer).toBe(1)
+    expect(dag.getNode('C').layer).toBe(2)
+  })
+  it('skip', () => {
+    const data = [
+      {
+        _id: 'A',
+        requirements: [],
+      },
+      {
+        _id: 'B',
+        requirements: [],
+      },
+      {
+        _id: 'C',
+        requirements: ['A'],
+      },
+      {
+        _id: 'D',
+        requirements: ['B', 'C'],
+      },
+    ]
+    const dag = new DAG(data)
+    expect(dag.getNode('A').layer).toBe(1)
+    expect(dag.getNode('B').layer).toBe(1)
+    expect(dag.getNode('C').layer).toBe(2)
+    expect(dag.getNode('D').layer).toBe(3)
+  })
+})
+
+describe('dag edges', () => {
+  it('one edge', () => {
+    const data = [
+      {
+        _id: 'helloworld',
+        requirements: [],
+      },
+      {
+        _id: 'spell',
+        requirements: ['helloworld'],
+      },
+    ]
+
+    const dag = new DAG(data)
+    expect(dag.getEdges()).toEqual(new Set([['helloworld', 'spell']]))
+  })
+
+  it('branch edges', () => {
+    const data = [
+      {
+        _id: 'helloworld',
+        requirements: [],
+      },
+      {
+        _id: 'spell',
+        requirements: ['helloworld'],
+      },
+      {
+        _id: 'discover',
+        requirements: ['helloworld'],
+      },
+    ]
+
+    const dag = new DAG(data)
+    expect(dag.getEdges()).toEqual(
+      new Set([
+        ['helloworld', 'discover'],
+        ['helloworld', 'spell'],
+      ])
+    )
+  })
+})
+
+describe('dag layers', () => {
+  it('two layer', () => {
+    const data = [
+      {
+        _id: 'helloworld',
+        requirements: [],
+      },
+      {
+        _id: 'spell',
+        requirements: ['helloworld'],
+      },
+    ]
+
+    const dag = new DAG(data)
+    expect(dag.getLayers()).toEqual([1, 1])
+  })
+
+  it('branch layers', () => {
+    const data = [
+      {
+        _id: 'helloworld',
+        requirements: [],
+      },
+      {
+        _id: 'spell',
+        requirements: ['helloworld'],
+      },
+      {
+        _id: 'discover',
+        requirements: ['helloworld'],
+      },
+    ]
+
+    const dag = new DAG(data)
+    expect(dag.getLayers()).toEqual([1, 2])
+  })
+})

packages/utils/index.js

@@ -1,2 +1,3 @@
 export { isValidEmail, isValidUsername } from './auth.js'
 export { buildFileCheckCmd } from './commands.js'
+export { default as DAG } from './dag.js'