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-rw-r--r--src/Codec/Pesto/Lint.lhs6
-rw-r--r--src/Main.lhs67
2 files changed, 57 insertions, 16 deletions
diff --git a/src/Codec/Pesto/Lint.lhs b/src/Codec/Pesto/Lint.lhs
index 4e7efa5..031d5af 100644
--- a/src/Codec/Pesto/Lint.lhs
+++ b/src/Codec/Pesto/Lint.lhs
@@ -3,7 +3,11 @@ Linting
.. class:: nodoc
-> module Codec.Pesto.Lint (lint, test, parseMetadata, extractMetadata) where
+> module Codec.Pesto.Lint (lint
+> , test
+> , parseMetadata
+> , extractMetadata
+> , Metadata(..)) where
> import Test.HUnit hiding (test, Node)
> import Data.List (sort, isPrefixOf)
> import Control.Applicative ((<*>), (<$>), (*>))
diff --git a/src/Main.lhs b/src/Main.lhs
index 5cc7c64..bebdd30 100644
--- a/src/Main.lhs
+++ b/src/Main.lhs
@@ -5,33 +5,70 @@ User interface
> module Main (main) where
> import System.IO (hPrint, stderr)
-> import Codec.Pesto.Parse (parse)
+> import System.Environment (getArgs)
+> import Data.List (intercalate)
+>
+> import Codec.Pesto.Parse (parse, Instruction (Ingredient), Quantity (..))
> import Codec.Pesto.Graph (extract, toGraph, firstNodeId, resolveReferences)
-> import Codec.Pesto.Lint (lint, extractMetadata)
+> import Codec.Pesto.Lint (lint, extractMetadata, Metadata(..))
> import Codec.Pesto.Dot (toDot)
+> import Codec.Pesto.Serialize (serialize)
-The pesto to dot converter can be run with ``cabal run pesto``. It expects a
-pesto recipe on the standard input and prints a dot graph to stdout that can be
-converted to an image by piping it through ``dot -Tpng``. Example:
+The user-interface has different modes of operation. All of read a single
+recipe from the standard input.
+
+> main = do
+> (op:_) <- getArgs
+> s <- getContents
+> either malformedRecipe (run op) (parse s)
+
+> malformedRecipe = print
+
+> streamToGraph stream = (nodes, edges)
+> where
+> doc = (head . extract . snd . unzip) stream
+> nodes = zip [firstNodeId..] doc
+> edges = toGraph nodes ++ resolveReferences nodes
+
+dot
+^^^
+
+Convert recipe into GraphViz’ dot language. Example:
.. code:: bash
- cabal run --verbose=0 pesto < spaghetti.pesto | dot -Tpng > spaghetti.png
+ cabal run --verbose=0 pesto dot < spaghetti.pesto | dot -Tpng > spaghetti.png
.. class:: todo
add linting information to graph
-> main = do
-> s <- getContents
-> (flip . either) malformedRecipe (parse s) $ \stream -> do
-> let
-> doc = (head . extract . snd . unzip) stream
-> nodes = zip [firstNodeId..] doc
-> edges = toGraph nodes ++ resolveReferences nodes
-> hPrint stderr $ extractMetadata nodes edges
+> run "dot" stream = do
+> let (nodes, edges) = streamToGraph stream
> hPrint stderr $ lint nodes edges
> putStrLn $ toDot nodes edges
-> malformedRecipe = print
+metadata
+^^^^^^^^
+
+Print metadata as key-value pairs, separated by ``=``.
+
+> run "metadata" stream = maybe (return ()) (mapM_ printMeta) $ uncurry extractMetadata $ streamToGraph stream
+
+ingredients
+^^^^^^^^^^^
+
+Extract ingredients and print them in CSV format. This does not take
+alternatives into account yet.
+
+> run "ingredients" stream = mapM_ (putStrLn . csvQty) $ reverse $ foldl getIngredient [] stream
+> where
+> getIngredient xs (_, Ingredient q) = q:xs
+> getIngredient xs _ = xs
+> run _ _ = putStrLn "unknown operation"
+
+> printMeta (_, (key, MetaStr value)) = putStrLn $ key ++ "=" ++ value
+> printMeta (_, (key, MetaQty q)) = putStrLn $ key ++ "=" ++ csvQty q
+
+> csvQty (Quantity a b c) = intercalate "," [serialize a, b, c]