Adds a node that is a digiline queryable database of all crafting and technic recipes known to the game engine.

This node can be used with a lua controller, lua sorting tubes and various technic machines to create a fully automated 'Universal Autocrafting Machine', which can recursively build anything (ex: technic:hv_battery_box0).

Depends on:

• technic
• digilines

1. get - Given an exact item name (ex: 'default:pick_stone', 'technic:hv_battery_box0', ...), return a list of all technic and regular recipes that can prodce that item.
2. find - Given a partial (or full) item name, return a table of all items with a matching name, and details about that item, such as its inventory image (for use in digistuff:touchscreen as 'addimage').

All respones are tables with 2 keys: request and response, with request being a verbatim copy of the original request (so that a LUAC can send multiple requests and correlate the resposnes). The sub response table depends on the API invoked.

get returns a list of all crafting, cooking and technic recipes that can produce the item specified.

Digiline request message format:

1. command (string) - Literal string get.
2. item (string) - Full itemstring name in the form "mod_name:item_name". Ex: 'technic:hv_cable'.

Example request:

  { command='get', item='default:pick_stone' }

The 'repsonse' entry is a list (iterate via 'ipairs()') of recipe tables.

Each recipe table contains the following keys:

1. inputs (table) - keys are item names, values are quanties required. Note that this is NOT the crafting grid arrangement. This is just a summary of the inputs for the LUAC's convienience.
2. action (string) - Which type of machine to use to create the item. Values come directly from underlying technic and crafting tables:
   1. alloy (alloy furnace, has 2 inputs)
   2. compressing (compressor)
   3. extracting (extractor)
   4. freezing (freezer)
   5. grinding (grinder)
   6. separating (centrifuge)
   7. normal (autocrafter)
   8. cooking (furnace)
3. craft (table) - Exact shape of which item goes into each slot of the crafting grid. Contains two elements:
   1. width (number) - Integer width of the crafting grid.
   2. grid (table) - Maps grid index (1 to width^2) to a string (item name).
4. outputs (table) - Maps item names to quantities of what is produced.
5. time (number) - Count of seconds required to make the item.

Examples are at the bottom of this document.

find returns a table of matching item strings and their inventory images. Additional data might be added in future revisions of this mod.

Digiline request message format:

1. command (string) - Literal string find.
2. item (string) - Any valid matcher passable to 'string:match()'. Use '.' to match every registered item.
3. offset (integer) - Defaults to 1. Used to paginate the results if the count of items exceeds max_count.
4. max_count (integer) - Defaults to 20. Must be between 1 and 20. Maximum count of results to return.

Digiline response table format:

1. key = full item string name. Ex: 'default:pick_stone'.
2. value = table:
   1. inventory_image - The inventory image filename copied from the item registration.

If the item pattern results in fewer than max_count+1 matching items, then the list is returned as-is. If there are more initial results than max_count, then the list is sorted by item string, then paginated by offset and max_count. In either case, the actual returned table is indexed by item name, so it is not inherently sorted.

1. Some crafting recipes genreate a 'returned item', these returned items are omiited from the return results. This is due to minetest.get_all_craft_recipes() not returning information on the 'returned item'. Ex: default.dirt takes a bucket:bucket_water and should return bucket:bucket_empty. It is not safe for the craftdb to jam the returned item in, as some recipes also take buckets of liquid and do NOT return them (ex: home decor's toilet).
2. The node texture is terrible. Please send a PR to fix this! I am not a pixel artist.

Send a query for crafting recipe:

digiline_send("craftdb", {command='get', item='default:pick_stone'})

Response:

{
  request = {
    item = "default:pick_stone",
    command = "get"
  },
  response = {
    {
      inputs = {
        ["group:stone"] = 3
      },
      action = "normal",
      craft = {
        width = 3,
        grid = {
          "group:stone",
          "group:stone",
          "group:stone",
          [5] = "group:stick",
          [8] = "group:stick"
        }
      },
      outputs = {
        ["default:pick_stone"] = 1
      },
      time = 1
    }
  }
}

Request:

digiline_send("craftdb", {command='get', item='technic:hv_battery_box0'})

Response:

{
  request = {
    item = "technic:hv_battery_box0",
    command = "get"
  },
  response = {
    {
      action = "normal",
      craft = {
        width = 3,
        grid = {
          "technic:mv_battery_box0",
          "technic:mv_battery_box0",
          "technic:mv_battery_box0",
          "technic:mv_battery_box0",
          "technic:hv_transformer",
          "technic:mv_battery_box0",
          [8] = "technic:hv_cable"
        }
      },
      inputs = {
        ["technic:hv_cable"] = 1,
        ["technic:mv_battery_box0"] = 5,
        ["technic:hv_transformer"] = 1
      },
      outputs = {
        ["technic:hv_battery_box0"] = 1
      },
      time = 1
    }
  }
}

Request:

digiline_send("craftdb", {command='get', item='technic:copper_plate'})

Response:

{
  request = {
    item = "technic:copper_plate",
    command = "get"
  },
  response = {
    {
      action = "compressing",
      inputs = {
        ["default:copper_ingot"] = 5
      },
      outputs = {
        ["technic:copper_plate"] = 1
      },
      time = 4
    }
  }
}

Request:

digiline_send("craftdb", {command='get', item='default:bronze_ingot'})

Response:

{
  request = {
    item = "default:bronze_ingot",
    command = "get"
  },
  response = {
    {
      action = "alloy",
      inputs = {
        ["default:tin_ingot"] = 1,
        ["default:copper_ingot"] = 7
      },
      outputs = {
        ["default:bronze_ingot"] = 8
      },
      time = 12
    },
    {
      action = "cooking",
      craft = {
        width = 3,
        grid = {
          "technic:bronze_dust"
        }
      },
      inputs = {
        ["technic:bronze_dust"] = 1
      },
      outputs = {
        ["default:bronze_ingot"] = 1
      },
      time = 1
    },
    {
      action = "normal",
      craft = {
        width = 1,
        grid = {
          "default:bronzeblock"
        }
      },
      inputs = {
        ["default:bronzeblock"] = 1
      },
      outputs = {
        ["default:bronze_ingot"] = 9
      },
      time = 1,
    }
  }
}