{
  "schema": 1,
  "name": "todo",
  "title": "To-do",
  "glyph": "✓",
  "blurb": "Create a to-do list",
  "collection": "items",
  "state": {
    "items": {
      "key": "id",
      "fields": {
        "id": "string",
        "text": "string",
        "done": "bool",
        "doneAt": "time",
        "by": "string"
      }
    }
  },
  "events": {
    "todo.add": {
      "require": ["$event.text"],
      "fold": [
        { "add": { "to": "items", "item": { "id": "$event.id", "text": "$event.text", "done": false, "doneAt": 0, "by": "$event.name" } } }
      ]
    },
    "todo.done": {
      "fold": [
        { "update": { "in": "items", "id": "$event.id", "set": { "done": true, "doneAt": "$event.ts" } } }
      ]
    },
    "todo.reopen": {
      "fold": [
        { "update": { "in": "items", "id": "$event.id", "set": { "done": false, "doneAt": 0 } } }
      ]
    },
    "todo.remove": {
      "fold": [
        { "remove": { "from": "items", "id": "$event.id" } }
      ]
    },
    "todo.move": {
      "require": ["$event.id"],
      "fold": [
        { "move": { "in": "items", "id": "$event.id", "after": "$event.after" } }
      ]
    }
  },
  "partition": { "flag": "done", "at": "doneAt", "graceMs": 750 },
  "actions": {
    "add": {
      "require": ["$input"],
      "steps": [
        { "emit": { "type": "todo.add", "id": "$newId", "text": "$input" } }
      ]
    },
    "toggle": {
      "steps": [
        { "if": { "truthy": "$item.done" }, "emit": { "type": "todo.reopen", "id": "$item.id" } },
        { "if": { "not": { "truthy": "$item.done" } }, "emit": { "type": "todo.done", "id": "$item.id" } }
      ]
    },
    "remove": {
      "steps": [
        { "emit": { "type": "todo.remove", "id": "$item.id" } }
      ]
    },
    "move": {
      "steps": [
        { "emit": { "type": "todo.move", "id": "$item.id", "after": "$after" } }
      ]
    }
  },
  "chat": {
    "todo.add": { "if": { "truthy": "$event.text" }, "text": "added “{event.text}”", "action": true }
  },
  "views": {
    "main": {
      "kind": "list",
      "composer": { "placeholder": "Add a to-do…", "button": "Add", "maxLength": 200, "action": "add" },
      "summary": [
        { "if": { "empty": "$items" }, "text": "No to-dos yet — add one above" },
        { "if": { "empty": "$buckets.active" }, "text": "all done 🎉" },
        { "text": "{buckets.active|count} left" }
      ],
      "search": { "fields": ["text"] },
      "sections": [
        { "id": "open", "source": ["active", "grace"], "order": { "by": "_index", "dir": "desc" }, "reorder": { "action": "move" } },
        { "id": "completed", "source": "archived", "title": "Completed ({count})", "collapsible": true, "collapsed": true, "order": { "by": "doneAt", "dir": "desc" } }
      ],
      "row": {
        "leading": { "kind": "check", "on": "$item.done", "action": "toggle" },
        "title": { "text": "{item.text}", "strike": { "truthy": "$item.done" }, "muted": { "truthy": "$item.done" } },
        "trailing": [
          { "kind": "button", "glyph": "×", "label": "Remove", "role": "destructive", "action": "remove" }
        ],
        "tap": { "action": "toggle" }
      }
    },
    "detail": {
      "title": "{item.text}",
      "sections": [
        {
          "kind": "definitions",
          "rows": [
            { "term": "Status", "value": "Done", "if": { "truthy": "$item.done" } },
            { "term": "Status", "value": "To do", "if": { "not": { "truthy": "$item.done" } } },
            { "term": "Completed", "value": "{item.doneAt|abstime}", "if": { "truthy": "$item.doneAt" } },
            { "term": "Added by", "value": "{item.by}", "if": { "truthy": "$item.by" } }
          ]
        },
        {
          "kind": "buttons",
          "items": [
            { "label": "Mark done", "action": "toggle", "dismiss": true, "if": { "not": { "truthy": "$item.done" } } },
            { "label": "Reopen", "action": "toggle", "dismiss": true, "if": { "truthy": "$item.done" } },
            { "label": "Remove", "action": "remove", "role": "destructive", "dismiss": true }
          ]
        }
      ]
    }
  }
}