frontend/marko/page/data/components/change/component.js

const moment = require("moment")

module.exports = class {
  onCreate() {
    this.state = {
      operation: "",
      links: [],
      parentLink: null,
    }
  }

  onInput(input) {
    if (input.data) {
      this.refresh(input.data)
    }
  }

  refresh(data) {
    this.state.links = []
    this.state.operation = opText[data.op]
    this.state.parentLink = null

    switch (data.model) {
      case "Channel": {
        const key = data.keys.find(k => k.id !== "*")

        this.state.operation += " channel"
        this.state.links = [{
          text: key.id,
          href: `/data/channels/`,
        }]

        break
      }

      case "Character": {
        const character = data.objects.find(o => o.type === "Character")

        this.state.operation += " character"
        this.state.links = [{
          text: `${character.name} (${character.id})`,
          href: `/data/characters/`,
        }]

        break
      }

      case "Story": {
        const key = data.keys.find(k => k.model === "Story" && k.id !== "*")
        const story = data.objects.find(o => o.type === "Story")
        
        this.state.operation += " story"
        this.state.links = [{
          text: story.name,
          href: `/story/${key.id}`,
        }]

        break
      }

      case "Chapter": {
        const storyKey = data.keys.find(k => k.model === "Story")
        const chapterKey = data.keys.find(k => k.model === "Chapter")
        const chapter = data.objects.find(o => o.type === "Chapter")
        
        this.state.operation += " chapter"
        this.state.links = [{
          text: chapter.title || `Untitled chapter (${chapterKey.id})`,
          href: `/story/${storyKey.id}#${chapterKey.id}`,
        }]

        break
      }

      case "Log": {
        const key = data.keys.find(k => k.id !== "*")
        
        this.state.operation += " log"
        this.state.links = [{
          text: key.id,
          href: `/logs/${key.id}`,
        }]

        break
      }

      case "Post": {
        const logKey = data.keys.find(k => k.model === "Log")
        const postKeys = data.keys.filter(k => k.model === "Post")
        const postObjs = data.objects.filter(o => o.type === "Post")
        
        this.state.operation += (postKeys.length > 1) ? " posts" : " post"
        this.state.links = postObjs.map(po => ({
          text: `[${moment(po.time).format("HH:mm")}] ${po.nick}`,
          href: `/logs/${logKey.id}#${po.id}`,
        }))
        this.state.parentLink = {
          prefix: "in log",
          text: `${logKey.id}`,
          href: `/logs/${logKey.id}`,
        }

        break
      }
    }
  }
}

const opText = {
  add: "added",
  remove: "removed",
  move: "moved",
  edit: "edited",
  import: "imported",
  tag: "tagged",
  untag: "untagged",
  "move-in": "moved in",
  "move-out": "moved out",
}