h-booru (empty) → 0.1.0.0
raw patch · 12 files changed
+1292/−0 lines, 12 filesdep +basedep +hxtdep +template-haskellsetup-changed
Dependencies added: base, hxt, template-haskell
Files
- LICENSE +621/−0
- README.md +4/−0
- Setup.hs +2/−0
- h-booru.cabal +34/−0
- src/HBooru/Parsers/Gelbooru.hs +48/−0
- src/HBooru/Parsers/GenericBooru.hs +104/−0
- src/HBooru/Parsers/GenericBooru/TH.hs +90/−0
- src/HBooru/Parsers/Ichijou.hs +47/−0
- src/HBooru/Parsers/Konachan.hs +48/−0
- src/HBooru/Parsers/Safebooru.hs +48/−0
- src/HBooru/Parsers/Yandere.hs +48/−0
- src/HBooru/Types.hs +198/−0
+ LICENSE view
@@ -0,0 +1,621 @@+ GNU GENERAL PUBLIC LICENSE+ Version 3, 29 June 2007++ Copyright (C) 2007 Free Software Foundation, Inc. <http://fsf.org/>+ Everyone is permitted to copy and distribute verbatim copies+ of this license document, but changing it is not allowed.++ Preamble++ The GNU General Public License is a free, copyleft license for+software and other kinds of works.++ The licenses for most software and other practical works are designed+to take away your freedom to share and change the works. By contrast,+the GNU General Public License is intended to guarantee your freedom to+share and change all versions of a program--to make sure it remains free+software for all its users. We, the Free Software Foundation, use the+GNU General Public License for most of our software; it applies also to+any other work released this way by its authors. You can apply it to+your programs, too.++ When we speak of free software, we are referring to freedom, not+price. 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+ README.md view
@@ -0,0 +1,4 @@+h-booru+=======++Haskell library for retrieving data from various booru image sites
+ Setup.hs view
@@ -0,0 +1,2 @@+import Distribution.Simple+main = defaultMain
+ h-booru.cabal view
@@ -0,0 +1,34 @@+name: h-booru+version: 0.1.0.0+synopsis: Haskell library for retrieving data from various booru image sites+description: Haskell library for retrieving data from various booru image sites.+ By providing a common interface for such sites and some parsers for+ few existing sites, the hope is to alleviate the effort of writing+ applications which interface with them.+homepage: https://github.com/Fuuzetsu/h-booru+license: GPL-3+license-file: LICENSE+author: Mateusz Kowalczyk+maintainer: fuuzetsu@fuuzetsu.co.uk+category: Web+build-type: Simple+extra-source-files: README.md+cabal-version: >=1.10+source-repository head+ type: git+ location: git@github.com:Fuuzetsu/h-booru.git++library+ hs-source-dirs: src+ default-language: Haskell2010+ exposed-modules:+ HBooru.Types+ HBooru.Parsers.Gelbooru+ HBooru.Parsers.Ichijou+ HBooru.Parsers.Konachan+ HBooru.Parsers.Safebooru+ HBooru.Parsers.Yandere+ HBooru.Parsers.GenericBooru+ HBooru.Parsers.GenericBooru.TH+ -- other-modules:+ build-depends: base >=4.6 && <5, hxt >= 9.3.1.2, template-haskell
+ src/HBooru/Parsers/Gelbooru.hs view
@@ -0,0 +1,48 @@+{-# LANGUAGE MultiParamTypeClasses #-}+{-# LANGUAGE UnicodeSyntax #-}+{-# LANGUAGE OverloadedStrings #-}+{-# LANGUAGE TypeFamilies #-}+{-# LANGUAGE TemplateHaskell #-}++-- |+-- Module : HBooru.Parsers.Gelbooru+-- Copyright : (c) Mateusz Kowalczyk 2013+-- License : GPL-3+--+-- Maintainer : fuuzetsu@fuuzetsu.co.uk+-- Stability : experimental+--+-- Module for parsing content from <http://gelbooru.com/ Gelbooru>.+module HBooru.Parsers.Gelbooru where++import Data.List+import qualified HBooru.Parsers.GenericBooru as G+import HBooru.Parsers.GenericBooru.TH (makePost)+import HBooru.Types+import Language.Haskell.TH (mkName)+import Text.XML.HXT.Core hiding (mkName)++-- | Data type for Gelbooru posts generated using 'makePost'.+$(makePost (mkName "GelbooruPost"))++-- | We use this type and its 'Site' instance to distinguish+-- between various parsers.+data Gelbooru = Gelbooru++instance Postable Gelbooru XML where+ postUrl _ _ ts =+ let tags = intercalate "+" ts+ in "http://gelbooru.com/index.php?page=dapi&s=post&q=index&limit=100&tags="+ ++ tags ++ "&pid=0"+ hardLimit _ = Limit 100++instance Site Gelbooru where++instance PostParser Gelbooru XML where+ type ImageTy Gelbooru XML = GelbooruPost+ parseResponse _ = map (`betweenPosts` GelbooruPost)+ . runLA (xreadDoc /> G.parsePost) . getResponse++instance Counted Gelbooru XML where+ parseCount _ = read . head . runLA (xreadDoc >>> hasName "posts"+ >>> getAttrValue "count") . getResponse
+ src/HBooru/Parsers/GenericBooru.hs view
@@ -0,0 +1,104 @@+{-# LANGUAGE UnicodeSyntax #-}+{-# LANGUAGE OverloadedStrings #-}+{-# LANGUAGE Arrows #-}+{-# LANGUAGE TemplateHaskell #-}+-- |+-- Module : HBooru.Parsers.GenericBooru+-- Copyright : (c) Mateusz Kowalczyk 2013+-- License : GPL-3+--+-- Maintainer : fuuzetsu@fuuzetsu.co.uk+-- Stability : experimental+--+-- | Many booru sites use the same engine (Gelbooru engine) so instead of having+-- identical parsers across many modules, we simply alias our 'GenericPost' to+-- whatever we need.+module HBooru.Parsers.GenericBooru where++import Prelude hiding (id)+import Data.String+import HBooru.Types+import HBooru.Parsers.GenericBooru.TH+import Text.Read (readMaybe)+import Text.XML.HXT.Core hiding (mkName)+import Language.Haskell.TH (mkName)++-- | A post we might expect from many of the sites as a lot of them seem to be+-- based on the Gelbooru engine.+$(makePost (mkName "GenericPost"))++-- | Fairly naïve parser for all attributes in sites running vanilla+-- Gelbooru engine. While it catches all attributes in a typical XML post+-- result, we trust that they are consistent and use 'read' to deserialise some+-- values. For sites with non-default replies, custom parsers have to be written.+parsePost ∷ ArrowXml cat ⇒ cat XmlTree GenericPost+parsePost = hasName "post" >>> proc x → do+ height <- getAttrValue "height" -< x+ score <- getAttrValue "score" -< x+ file_url <- getAttrValue "file_url" -< x+ parent_id <- getAttrValue "parent_id" -< x+ sample_url <- getAttrValue "sample_url" -< x+ sample_width <- getAttrValue "sample_width" -< x+ sample_height <- getAttrValue "sample_height" -< x+ preview_url <- getAttrValue "preview_url" -< x+ rating <- getAttrValue "rating" -< x+ tags <- getAttrValue "tags" -< x+ id <- getAttrValue "id" -< x+ width <- getAttrValue "width" -< x+ change <- getAttrValue "change" -< x+ md5 <- getAttrValue "md5" -< x+ creator_id <- getAttrValue "creator_id" -< x+ has_children <- getAttrValue "has_children" -< x+ created_at <- getAttrValue "created_at" -< x+ status <- getAttrValue "status" -< x+ source <- getAttrValue "source" -< x+ has_notes <- getAttrValue "has_notes" -< x+ has_comments <- getAttrValue "has_comments" -< x+ preview_width <- getAttrValue "preview_width" -< x+ preview_height <- getAttrValue "preview_height" -< x+ returnA -< GenericPost+ { heightT = read height+ , scoreT = read score+ , file_urlT = file_url+ , parent_idT = readMaybe parent_id+ , sample_urlT = sample_url+ , sample_widthT = read sample_width+ , sample_heightT = read sample_height+ , preview_urlT = preview_url+ , ratingT = parseRating rating+ , tagsT = parseTags tags+ , idT = read id+ , widthT = read width+ , changeT = change+ , md5T = md5+ , creator_idT = read creator_id+ , has_childrenT = parseBool has_children+ , created_atT = created_at+ , statusT = status+ , sourceT = source+ , has_notesT = parseBool has_notes+ , has_commentsT = parseBool has_comments+ , preview_widthT = read preview_width+ , preview_heightT = read preview_height+ }++-- | Parses a string returned from a Gelbooru-like site into+-- one of the commonly used 'Rating's. Note that this is a partial function+-- so you should make sure that the site in question only ever returns the+-- values in a format specified in the function+parseRating :: String -> Rating+parseRating "e" = Explicit+parseRating "s" = HBooru.Types.Safe+parseRating "q" = Questionable++-- | Splits returned tag string into separate 'Tag's. For Gelbooru-like+-- sites, this is just the question of splitting on whitespace.+parseTags :: String -> [Tag]+parseTags = words++-- | Reads a lowercase 'Bool' string representation into its Haskell type. If we+-- can't parse the boolean, return 'Nothing'.+parseBool :: String -> Maybe Bool+parseBool "false" = Just False+parseBool "true" = Just True+parseBool _ = Nothing
+ src/HBooru/Parsers/GenericBooru/TH.hs view
@@ -0,0 +1,90 @@+{-# LANGUAGE TemplateHaskell #-}+-- |+-- Module : HBooru.Parsers.GenericBooru.TH+-- Copyright : (c) Mateusz Kowalczyk 2013+-- License : GPL-3+--+-- Maintainer : fuuzetsu@fuuzetsu.co.uk+-- Stability : experimental+--+-- | Helper module for "HBooru.Parsers.GenericBooru" due to Template Haskell+-- limitation of being unable to splice inside of the same module of+-- definitions.+module HBooru.Parsers.GenericBooru.TH where++import Control.Applicative+import HBooru.Types+import Language.Haskell.TH+import Language.Haskell.TH.Syntax++-- | A TH helper which makes an instance along with the data type using+-- 'makePost'' and 'makePostInstance'.+makePost n = liftA2 (++) (makePost' n) (makePostInstance n)++-- | Template Haskell function which is able to generate 'GenericPost'-alike+-- type declarations for cases where we want to use this format but need a+-- different data type. It can be used by using @TemplateHaskell@ extension and+-- calling @$(makePost ('mkName' \"YourTypeName\"))@ at the top level. Hopefully+-- a temporary measure until the author thinks of a better way to provide+-- generic Gelbooru-like post parsing while casting out to different data types+-- that's OK to write.+makePost' :: Name -> Q [Dec]+makePost' n =+ fmap (:[]) $ dataD (cxt []) n []+ [ recC n+ [ varStrictType (mkName "heightT") $ strictType notStrict [t| Integer |]+ , varStrictType (mkName "scoreT") $ strictType notStrict [t| Integer |]+ , varStrictType (mkName "file_urlT") $ strictType notStrict [t| String |]+ , varStrictType (mkName "parent_idT") $ strictType notStrict+ [t| Maybe Integer |]+ , varStrictType (mkName "sample_urlT") $ strictType notStrict [t| String |]+ , varStrictType (mkName "sample_widthT") $ strictType notStrict+ [t| Integer |]+ , varStrictType (mkName "sample_heightT") $ strictType notStrict+ [t| Integer |]+ , varStrictType (mkName "preview_urlT") $ strictType notStrict [t| String |]+ , varStrictType (mkName "ratingT") $ strictType notStrict [t| Rating |]+ , varStrictType (mkName "tagsT") $ strictType notStrict [t| [String] |]+ , varStrictType (mkName "idT") $ strictType notStrict [t| Integer |]+ , varStrictType (mkName "widthT") $ strictType notStrict [t| Integer |]+ , varStrictType (mkName "changeT") $ strictType notStrict [t| String |]+ , varStrictType (mkName "md5T") $ strictType notStrict [t| String |]+ , varStrictType (mkName "creator_idT") $ strictType notStrict [t| Integer |]+ , varStrictType (mkName "has_childrenT") $ strictType notStrict+ [t| Maybe Bool |]+ , varStrictType (mkName "created_atT") $ strictType notStrict [t| String |]+ , varStrictType (mkName "statusT") $ strictType notStrict [t| String |]+ , varStrictType (mkName "sourceT") $ strictType notStrict [t| String |]+ , varStrictType (mkName "has_notesT") $ strictType notStrict+ [t| Maybe Bool |]+ , varStrictType (mkName "has_commentsT") $ strictType notStrict+ [t| Maybe Bool |]+ , varStrictType (mkName "preview_widthT") $ strictType notStrict+ [t| Integer |]+ , varStrictType (mkName "preview_heightT") $ strictType notStrict+ [t| Integer |]+ ]+ ] [mkName "Show", mkName "Eq"]++-- | Template Haskell function which creates 'Post' instances for things made+-- with 'makePost'.+makePostInstance :: Name -> Q [Dec]+makePostInstance n = do+ return [InstanceD+ []+ (ConT (mkName "Post") `AppT` ConT n)+ [ onG "height", onG "score", onG "file_url", onG "parent_id"+ , onG "sample_url", onG "sample_width", onG "sample_height"+ , onG "preview_url", onG "rating", onG "tags", onG "id"+ , onG "width", onG "change", onG "md5", onG "creator_id"+ , onG "has_children", onG "created_at", onG "status"+ , onG "source", onG "has_notes", onG "has_comments"+ , onG "preview_width", onG "preview_height"+ ]+ ]+ where+ onG n = FunD (mkName n)+ [ Clause [(VarP (mkName "g"))]+ (NormalB (AppE (VarE (mkName $ n ++ "T"))+ (VarE (mkName "g")))) []+ ]
+ src/HBooru/Parsers/Ichijou.hs view
@@ -0,0 +1,47 @@+{-# LANGUAGE MultiParamTypeClasses #-}+{-# LANGUAGE UnicodeSyntax #-}+{-# LANGUAGE OverloadedStrings #-}+{-# LANGUAGE TypeFamilies #-}+{-# LANGUAGE TemplateHaskell #-}++-- |+-- Module : HBooru.Parsers.Ichijou+-- Copyright : (c) Mateusz Kowalczyk 2013+-- License : GPL-3+--+-- Maintainer : fuuzetsu@fuuzetsu.co.uk+-- Stability : experimental+--+-- Module for parsing content from <http://safebooru.org/ safebooru>.+module HBooru.Parsers.Ichijou where++import Data.List+import qualified HBooru.Parsers.GenericBooru as G+import HBooru.Parsers.GenericBooru.TH (makePost)+import HBooru.Types+import Language.Haskell.TH.Syntax (mkName)+import Text.XML.HXT.Core hiding (mkName)++-- | Data type for safebooru posts generated using 'makePost'.+$(makePost (mkName "IchijouPost"))++-- | We use this type and its 'Site' instance to distinguish+-- between various parsers.+data Ichijou = Ichijou++instance Postable Ichijou XML where+ postUrl _ _ ts =+ let tags = intercalate "+" ts+ in "http://ichijou.org/index.xml?tags=" ++ tags+ hardLimit _ = Limit 100++instance Site Ichijou where++instance PostParser Ichijou XML where+ type ImageTy Ichijou XML = IchijouPost+ parseResponse _ = map (`betweenPosts` IchijouPost)+ . runLA (xreadDoc /> G.parsePost) . getResponse++instance Counted Ichijou XML where+ parseCount _ = read . head . runLA (xreadDoc >>> hasName "posts"+ >>> getAttrValue "count") . getResponse
+ src/HBooru/Parsers/Konachan.hs view
@@ -0,0 +1,48 @@+{-# LANGUAGE MultiParamTypeClasses #-}+{-# LANGUAGE UnicodeSyntax #-}+{-# LANGUAGE OverloadedStrings #-}+{-# LANGUAGE TypeFamilies #-}+{-# LANGUAGE TemplateHaskell #-}++-- |+-- Module : HBooru.Parsers.Konachan+-- Copyright : (c) Mateusz Kowalczyk 2013+-- License : GPL-3+--+-- Maintainer : fuuzetsu@fuuzetsu.co.uk+-- Stability : experimental+--+-- Module for parsing content from <http://konachan.com/ Konachan>.++module HBooru.Parsers.Konachan where++import Data.List+import qualified HBooru.Parsers.GenericBooru as G+import HBooru.Parsers.GenericBooru.TH (makePost)+import HBooru.Types+import Language.Haskell.TH (mkName)+import Text.XML.HXT.Core hiding (mkName)++-- | Data type for Konachan posts generated using 'makePost'.+$(makePost (mkName "KonachanPost"))++-- | We use this type and its 'Site' instance to distinguish+-- between various parsers.+data Konachan = Konachan++instance Postable Konachan XML where+ postUrl _ _ ts =+ let tags = intercalate "+" ts+ in "https://konachan.com/post/index.xml?tags=" ++ tags+ hardLimit _ = Limit 100++instance Site Konachan where++instance PostParser Konachan XML where+ type ImageTy Konachan XML = KonachanPost+ parseResponse _ = map (`betweenPosts` KonachanPost)+ . runLA (xreadDoc /> G.parsePost) . getResponse++instance Counted Konachan XML where+ parseCount _ = read . head . runLA (xreadDoc >>> hasName "posts"+ >>> getAttrValue "count") . getResponse
+ src/HBooru/Parsers/Safebooru.hs view
@@ -0,0 +1,48 @@+{-# LANGUAGE MultiParamTypeClasses #-}+{-# LANGUAGE UnicodeSyntax #-}+{-# LANGUAGE OverloadedStrings #-}+{-# LANGUAGE TypeFamilies #-}+{-# LANGUAGE TemplateHaskell #-}++-- |+-- Module : HBooru.Parsers.Safebooru+-- Copyright : (c) Mateusz Kowalczyk 2013+-- License : GPL-3+--+-- Maintainer : fuuzetsu@fuuzetsu.co.uk+-- Stability : experimental+--+-- Module for parsing content from <http://safebooru.org/ safebooru>.+module HBooru.Parsers.Safebooru where++import Data.List+import qualified HBooru.Parsers.GenericBooru as G+import HBooru.Parsers.GenericBooru.TH (makePost)+import HBooru.Types+import Language.Haskell.TH.Syntax (mkName)+import Text.XML.HXT.Core hiding (mkName)++-- | Data type for safebooru posts generated using 'makePost'.+$(makePost (mkName "SafebooruPost"))++-- | We use this type and its 'Site' instance to distinguish+-- between various parsers.+data Safebooru = Safebooru++instance Postable Safebooru XML where+ postUrl _ _ ts =+ let tags = intercalate "+" ts+ in "http://safebooru.org/index.php?page=dapi&s=post&q=index&limit=100&tags="+ ++ tags ++ "&pid=0"+ hardLimit _ = Limit 100++instance Site Safebooru where++instance PostParser Safebooru XML where+ type ImageTy Safebooru XML = SafebooruPost+ parseResponse _ = map (`betweenPosts` SafebooruPost)+ . runLA (xreadDoc /> G.parsePost) . getResponse++instance Counted Safebooru XML where+ parseCount _ = read . head . runLA (xreadDoc >>> hasName "posts"+ >>> getAttrValue "count") . getResponse
+ src/HBooru/Parsers/Yandere.hs view
@@ -0,0 +1,48 @@+{-# LANGUAGE MultiParamTypeClasses #-}+{-# LANGUAGE UnicodeSyntax #-}+{-# LANGUAGE OverloadedStrings #-}+{-# LANGUAGE TypeFamilies #-}+{-# LANGUAGE TemplateHaskell #-}++-- |+-- Module : HBooru.Parsers.Yandere+-- Copyright : (c) Mateusz Kowalczyk 2013+-- License : GPL-3+--+-- Maintainer : fuuzetsu@fuuzetsu.co.uk+-- Stability : experimental+--+-- Module for parsing content from <http://yande.re/ Yandere>,+-- known in the past as <http://mou.imouto.org MouImouto>.+module HBooru.Parsers.Yandere where++import Data.List+import qualified HBooru.Parsers.GenericBooru as G+import HBooru.Parsers.GenericBooru.TH (makePost)+import HBooru.Types+import Language.Haskell.TH (mkName)+import Text.XML.HXT.Core hiding (mkName)++-- | Data type for Yandere posts generated using 'makePost'.+$(makePost (mkName "YanderePost"))++-- | We use this type and its 'Site' instance to distinguish+-- between various parsers.+data Yandere = Yandere++instance Postable Yandere XML where+ postUrl _ _ ts =+ let tags = intercalate "+" ts+ in "https://yande.re/post/index.xml?tags=" ++ tags+ hardLimit _ = Limit 100++instance Site Yandere where++instance PostParser Yandere XML where+ type ImageTy Yandere XML = YanderePost+ parseResponse _ = map (`betweenPosts` YanderePost)+ . runLA (xreadDoc /> G.parsePost) . getResponse++instance Counted Yandere XML where+ parseCount _ = read . head . runLA (xreadDoc >>> hasName "posts"+ >>> getAttrValue "count") . getResponse
+ src/HBooru/Types.hs view
@@ -0,0 +1,198 @@+{-# LANGUAGE MultiParamTypeClasses #-}+{-# LANGUAGE ScopedTypeVariables #-}+{-# LANGUAGE UnicodeSyntax #-}+{-# LANGUAGE TypeFamilies #-}+{-# LANGUAGE FunctionalDependencies #-}++-- |+-- Module : HBooru.Types+-- Copyright : (c) Mateusz Kowalczyk 2013+-- License : GPL-3+--+-- Maintainer : fuuzetsu@fuuzetsu.co.uk+-- Stability : experimental+--+-- Module definining types used by the library.+module HBooru.Types where++import Prelude hiding (id)++-- | Tags used for searching in sites. No special escaping is done.+-- Note that many sites would treat a tag like \"striped panties\"+-- as two separate tags and you wouldn't get the results you were after.+type Tag = String++-- | Data format used by various 'Site's. See instances for currently used+-- formats.+class DataFormat a where++-- | Used as one of the data formats.+data XML = XML deriving Show++-- | Used as one of the data formats.+data JSON = JSON deriving Show++instance DataFormat XML where+instance DataFormat JSON where++-- | Thanks to this class, we're able to provide instances converting+-- from a 'DataFormat' to 'Response'. This is useful if we need a 'DataFormat'+-- while we only have a type that's an instance of 'Response'. Note that the+-- functional dependency currently requires that there is only one way to coerce+-- between two types.+class Response r ⇒ CoerceResponse x r | x → r, r → x where+ -- | Given something and a 'String', we get the appropriate 'Response'.+ -- For example with @instance 'CoerceResponse' 'XML' 'XMLResponse'@:+ --+ -- >>> toResponse XML "<SomeXML></SomeXML>"+ -- XMLReponse "<SomeXML></SomeXML>"+ toResponse ∷ x → String → r+ -- | Given some kind of 'Response', we get the appropriate value back,+ -- depending on the class instance.+ -- For example with @instance 'CoerceResponse' 'XML' 'XMLResponse'@:+ --+ -- >>> fromResponse $ XMLReponse "<SomeXML></SomeXML>"+ -- XML+ fromResponse ∷ r → x++instance CoerceResponse XML XMLResponse where+ toResponse _ = XMLResponse+ fromResponse _ = XML++instance CoerceResponse JSON JSONResponse where+ toResponse _ = JSONResponse+ fromResponse _ = JSON++-- | Class specifying a parser that can fetch posts. A post usually consists of+-- links to the image, samples, and some meta-data. See+-- 'HBooru.Parsers.GenericBooru.GenericPost' for the kind of thing we usually+-- get out. The reason for this class is that sometimes we might get different+-- information based on the 'DataFormat' we use so we use type families to+-- denote this rather than forcing the library user to make do with our best+-- guess on what goes into the post. It also allows us to use different post+-- types for sites that provide different information.+class (Site s, DataFormat r) ⇒ PostParser s r where+ type ImageTy s r+ -- | Given a parser working with 'DataFormat' specified by an instance of+ -- this class, we require through 'CoerceResponse' that it is able to parse+ -- responses in the format so what we actually pass into this function is+ -- the 'Site' this parser works with (so that we can pick the appropriate data+ -- type for the posts) and a 'Response' matching the 'DataFormat' (through a+ -- class instance). For @PostParser 'Gelbooru' 'XML'@ instance, example use+ -- might go like+ --+ -- @+ -- do fc \<- 'XMLResponse' <$> 'readFile' \"gelbooruResponse.xml\"+ -- -- the type of images is actually inferred for us+ -- let images ∷ ['HBooru.Parsers.Gelbooru.GelbooruPost']+ -- images = parseResponse 'HBooru.Parsers.Gelbooru.Gelbooru' fc+ -- return images+ -- @+ --+ -- The cool thing is that we can't feed anything but 'XMLResponse' to an+ -- XML parser.+ parseResponse ∷ CoerceResponse r r' ⇒ s → r' → [ImageTy s r]++-- | Describes whether a response from a 'Site' in given 'DataFormat'+-- allows us to get the information about total number of posts matching our+-- query. Some sites don't provide this information.+class (Site s, DataFormat r) ⇒ Counted s r where+ parseCount ∷ CoerceResponse r r' ⇒ s → r' → Integer++-- | If we can make an API request to 'Site' in a specific 'DataFormat', we can+-- use instances of this class to pass in+class (Site s, DataFormat r) ⇒ Postable s r where+ -- | Given a 'Site', a 'DataFormat' and a list of 'Tag's, an instance of this+ -- class should be able to return a 'String' at which we can find data in+ -- 'DataFormat' format that honours our tags. This is effectively a URL+ -- builder for POST requests.+ postUrl ∷ s → r → [Tag] → String+ -- | Provides information about whether there's a hard limit on the amount of+ -- posts we can fetch from the site at once. The reason for this function here+ -- rather than in 'Site' is that we might be parsing data without an API we+ -- can post to at all and we're getting our data through other means.+ hardLimit ∷ s → Limit++-- | Describes a site for a parser. The reason why this isn't a simple data type+-- is to allow us to write additional parsers in the future without modifying+-- this library if we wish to do so.+class Site s where++-- | Rating used on *booru sites.+data Rating = Safe | Questionable | Explicit deriving (Show, Eq)++-- | Denotes whethere there's a hard limit on the number of posts+-- we can fetch at a time from a site. NoLimit implies that we can fetch+-- everything at once and not that we don't know. See 'Counted' for a way to+-- potentially retrieve number of posts present on the site.+data Limit = NoLimit | Limit Integer deriving (Show, Eq)++-- | One of the formats we can receive responses from sites in. For things+-- like parsers parametrisation, use 'XML' instead and use methods in+-- 'CoerceResponse' if you need to.+data XMLResponse = XMLResponse String deriving Show++-- | One of the formats we can receive responses from sites in. For things+-- like parsers parametrisation, use 'JSON' instead and use methods in+-- 'CoerceResponse' if you need to.+data JSONResponse = JSONResponse String deriving Show++-- | Specifies what is considered a response. You'll almost certainly also+-- want new 'DataFormat' and 'CoerceResponse' instances if you're adding some+-- here. This class assumes that all responses carry the response in a string we+-- can extract. Note that this is not for use as network response if you're+-- scraping, only for putting data into after you have done all the error+-- checking and whatnot.+class Response r where+ -- | Extract the response string.+ getResponse ∷ r → String++instance Response XMLResponse where+ getResponse (XMLResponse x) = x++instance Response JSONResponse where+ getResponse (JSONResponse x) = x++-- | Class representing a best-case scenario post. We use this+-- to convert between different posts for each site while providing+-- uniform access. The methods are just the attributes of posts seen+-- on Gelbooru-like sites.+class Post a where+ height ∷ a → Integer+ score ∷ a → Integer+ file_url ∷ a → String+ parent_id ∷ a → Maybe Integer+ sample_url ∷ a → String+ sample_width ∷ a → Integer+ sample_height ∷ a → Integer+ preview_url ∷ a → String+ rating ∷ a → Rating+ tags ∷ a → [String]+ id ∷ a → Integer+ width ∷ a → Integer+ change ∷ a → String+ md5 ∷ a → String+ creator_id ∷ a → Integer+ has_children ∷ a → Maybe Bool+ created_at ∷ a → String+ status ∷ a → String+ source ∷ a → String+ has_notes ∷ a → Maybe Bool+ has_comments ∷ a → Maybe Bool+ preview_width ∷ a → Integer+ preview_height ∷ a → Integer+ betweenPosts ∷ Post b ⇒ a → PostConstructor b → b+ betweenPosts g c =+ c (height g) (score g) (file_url g) (parent_id g) (sample_url g)+ (sample_width g) (sample_height g) (preview_url g) (rating g)+ (tags g) (id g) (width g) (change g) (md5 g) (creator_id g)+ (has_children g) (created_at g) (status g) (source g) (has_notes g)+ (has_comments g) (preview_width g) (preview_height g)+++-- | A cludge for use with 'betweenPosts'+type PostConstructor b =+ Integer -> Integer -> String -> Maybe Integer -> String -> Integer -> Integer+ -> String -> Rating -> [String] -> Integer -> Integer -> String -> String+ -> Integer -> Maybe Bool -> String -> String -> String -> Maybe Bool+ -> Maybe Bool -> Integer -> Integer -> b