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StackExchangeAPI.m
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StackExchangeAPI.m
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(* ::Package:: *)
(* Autogenerated Package *)
StackExchangeAPI::usage="A symbol used for messages";
StackExchangeInterface::usage="An interface to the API";
$StackExchangeSites::usage="A set of stack exchange sites";
$SEAuthToken::usage=
"A token that, if not none, will be passed to all API calls";
$SECallQuota::usage="The overall stack exchange API call quota";
$SECallsRemaining::usage="The stack exchange API calls remaining to a user";
$SELastCall::usage="The last API call sent";
$SECallCache::usage="The cache of all calls this session";
$SEDefaultSite::usage="The default site to use";
SEUser::usage="A Stack Exchange user";
SEQuestion::usage="A Stack Exchange question";
SEAnswer::usage="A Stack Exchange answer";
SEByID::usage="Converts an ID into a user, question, or answer";
SEBuildCall::usage="Constructs a call to the API";
SECallAPI::usage="Calls the Stack Exchange API";
SEQuestions::usage="Searches for questions matching various parameters";
SEAnswers::usage="Searches for answers matching various parameters";
SEUsers::usage="Searches for users matching various parameters";
SESearch::usage="A simplified search mechanism";
SECallInfo::usage="Turns a url into API call parameters";
SEAuthorize::usage=
"Authorizes the app and sets the return value to $SEAuthToken";
SELookup::usage="Applies lookup to the association of the SE object";
SEGather::usage="Gathers the fields for multiple calls";
SEImport::usage="Imports stuff from a SE page";
SEChatScrape::usage="Scrapes data off a SE chat channel";
Begin["`Private`"];
$StackExchangeAPIRoot="api.stackexchange.com";
$StackExchangeAPIVersion=2.2;
(* ::Subsection:: *)
(*API Usage*)
If[!MatchQ[$StackExchangeSites,_Association],
$StackExchangeSites=
<|
"StackExchange"->"stackexchange.com",
"StackOverflow"->"stackoverflow.com",
"Mathematica"->"mathematica.stackexchange.com"
|>];
If[!MatchQ[$SECallCache,_Association],$SECallCache=<||>];
If[!MatchQ[$SEByIDCache,_Association],$SEByIDCache=<||>];
If[!MatchQ[$ThumbnailCache,_Association],$ThumbnailCache=<||>];
If[!MatchQ[$SEAuthToken,_String?(StringLength@#>0&)],
$SEAuthToken=None];
If[!MatchQ[$SEClientKey,_String?(StringLength@#>0&)],
Do[
With[{f=
FileNameJoin@{$PackageDirectory,
"Private",
file}},
If[FileExistsQ@f,
$SEClientKey=Import@f
]
],
{
file,
{
"SEKey.wl",
"SEKey.m"
}
}
]
];
If[!MatchQ[$SECallQuota,_Integer],$SECallQuota=0];
If[!MatchQ[$SECallsRemaining,_Integer],$SECallsRemaining=0];
If[!MatchQ[$SELastCall,_String],$SELastCall=None];
If[!MatchQ[$SEDefaultSite,_String],
$SEDefaultSite="mathematica.stackexchange.com"
];
StackExchangeAPI::build="Couldn't build API call from parameters";
buildCall[return:_String|{__String},site_String,parameters___Rule]:=
URLBuild@
<|
"Scheme"->"https",
"Domain"->$StackExchangeAPIRoot,
"Path"->Flatten@{ToString@$StackExchangeAPIVersion,return},
"Query"->{"site"->site,parameters}
|>;
buildCall[a_Association]:=
buildCall[
a["CallPath"],
a["Site"],
Sequence@@formatParameters@a["Parameters"]
];
buildCall[__]:=(Message[StackExchangeAPI::build];$Failed);
SEBuildCall[
return:_String|{__String},
site:_String|Automatic:Automatic,
parameters___Rule
]:=
buildCall[
return,
Replace[site, Automatic->$SEDefaultSite],
parameters
];
StackExchangeAPI::reterr="Couldn't parse return data from API call ``";
StackExchangeAPI::jsonerr="Couldn't convert data into JSON from API call ``";
StackExchangeAPI::abort="Aborting API call";
StackExchangeAPI::err="Error ``-``: ``";
callAPI[URL[baseURL_String]]:=
With[{url=
If[MatchQ[$SEAuthToken,_String?(StringLength@#>0&)],
URLBuild@
With[{a=URLParse@baseURL},
Append[a,
"Query"->
Join[
DeleteCases[
a["Query"],
"access_token"|"key"->_
],
{
"access_token"->$SEAuthToken,
"key"->$SEClientKey
}
]
]
],
baseURL
]},
Replace[
$SELastCall=url;
$SECallCache[url],
_Missing:>
With[{json=Import[url,"JSON"]},
If[MatchQ[json,Except@$Failed],
With[{data=
Append[json(*/.s_String:>ImportString[s,"HTML"]*),
"site"->Lookup[Association@URLParse[url]["Query"],"site",None]
]},
If[MatchQ[data,_List],
Replace[
"quota_max"/.data,
i_Integer:>($SECallQuota=i)
];
Replace[
"quota_remaining"/.data,
i_Integer:>($SECallsRemaining=i)
];
Switch[data,
{___,"items"->_,___},
$SECallCache[url]=
<|
"Results"->"items",
"MoreData"->"has_more",
"Site"->"site"
|>/.data,
{___,"error_id"->_,___},
$SECallCache[url]=
<|
"ErrorID"->"error_id",
"ErrorMessage"->"error_message",
"ErrorName"->"error_name"
"Site"->"site"
|>/.data;
Message[
StackExchangeAPI::err,
"ErrorID"/.$SECallCache[url],
"ErrorName"/.$SECallCache[url],
"ErrorMessage"/.$SECallCache[url]
];
$Failed,
_,
$SECallCache[url]=data
],
Message[StackExchangeAPI::jsonerr,url];
$Failed
]
],
Message[StackExchangeAPI::reterr,url];
$Failed
]
]
]
];
callAPI[return:_String|{__String},site_String,parameters___Rule]:=
callAPI@URL@buildCall[return,site,parameters];
SECallAPI[url_String]:=callAPI@URL@url;
$queryParameterFormMap=
<|
"FreeFormSearch"->_String,
"Title"->_String,
"UserID"->_String,
"UserName"->_String,
"PageNumber"->_Integer|_String,
"NumberOfEntries"->_Integer|_String,
"From"->_DateObject|_String,
"To"->_DateObject|_String,
"Views"->_Integer|_String,
"Answers"->_Integer|_String,
"TaggedAs"->{__String}|_String,
"NotTaggedAs"->{__String}|_String,
"OrderBy"->"asc"|"desc",
"SortBy"->
"activity"|"votes"|"creation"|
"relevance"|"reputation"|"name"|"modified",
"MaxSortValue"->_Integer|_DateObject|_String,
"MinSortValue"->_Integer|_DateObject|_String,
"ContainsURL"->_String,
"Migrated"->True|False|_String,
"Accepted"->True|False|_String,
"Closed"->True|False|_String,
"WikiQuestion"->True|False|_String
|>;
$queryParameterNameMap=
<|
"Title"->"title",
"PageNumber"->"page",
"From"->"fromdate",
"To"->"todate",
"NumberOfEntries"->"pagesize",
"UserID"->"user",
"TaggedAs"->"tagged",
"NotTaggedAs"->"nottagged",
"WikiQuestion"->"wiki",
"OrderBy"->"order",
"SortBy"->"sort",
"MaxSortValue"->"max",
"MinSortValue"->"min",
"Migrated"->"migrated",
"Accepted"->"accepted",
"Closed"->"closed",
"ContainsURL"->"url",
"Views"->"views",
"Answers"->"answers",
"FreeFormSearch"->"q",
"UserName"->"inname"
|>;
StackExchangeAPI::badkey="Key `` not valid";
StackExchangeAPI::badfrm="Key `` cannot take on value ``";
formatParameters[parameters:{___Rule}]:=
Table[
With[{key=First@p,value=Last@p},
If[KeyMemberQ[$queryParameterFormMap,key],
If[MatchQ[value,key/.$queryParameterFormMap],
(key/.$queryParameterNameMap)->
URLEncode@
Replace[value,{
i_Integer:>ToString@i,
True->"true",
False->"false",
d_DateObject:>UnixTime@d,
l_List:>StringJoin@Riffle[ToString/@l,";"]
}],
Message[StackExchangeAPI::badfrm,key,value];
$Failed
],
Message[StackExchangeAPI::badkey,key];
$Failed
]
],
{p,parameters}
];
formatParameters[parameters_Association]:=formatParameters@Normal@parameters;
SECallInfo[url_]:=
With[{ua=URLParse@url},
<|
"CallPath"->
DeleteCases[
Replace[ua["Path"],
{ ___,
ToString@$StackExchangeAPIVersion,
e__
}:>
{e}
],
""],
"Site"->
("site"/.ua["Query"]),
"Parameters"->
Table[
(First@k/.(Reverse/@Normal@$queryParameterNameMap))->Last@k,
{k,DeleteCases[
ua["Query"],
"site"->_
]}]
|>
];
SEByID[
(h:SEAnswer|SEQuestion|SEUser)[id_,site_]
]:=
SEByID[h,id,site];
SEByID[
h:SEAnswer|SEQuestion|SEUser,
id_Integer,
site_String]:=
Replace[
$SEByIDCache[{h,id,site}],
_Missing:>
With[{ret=
Switch[h,
SEAnswer,
SEAnswers@
URL@
buildCall[
{"answers",ToString@id},
site
],
SEQuestion,
SEQuestions@
URL@
buildCall[
{"questions",ToString@id},
site
],
SEUser,
SEUsers@
URL@
buildCall[
{"users",ToString@id},
site
]
]
},
Replace[ret,
{o_,___}:>
($SEByIDCache[{h,id,site}]=o)
]
]
];
$SEUserTemplate=
<|
"Name"->"display_name",
"ID"->"user_id",
"Reputation"->"reputation",
"Image"->"profile_image",
"Type"->"user_type",
"Account"->"link"
|>;
SEUser[l_List,site_:None]:=
With[{
base=
$SEUserTemplate/.
Append[l,(Alternatives@@Values@$SEUserTemplate)->None]
},
SEUser@
Merge[
{
base,
<|
"Site"->site
|>
},
Last]
];
Format[s:SEUser[a_Association]]:=
SummarizedForm[
s,
Dynamic@
Replace[
$ThumbnailCache@a["Image"],
_Missing:>
With[{img=Import[a["Image"],"Image"]},
If[MatchQ[img,Except@$Failed],
$ThumbnailCache@a["Image"]=Image[img,ImageSize->{32,32}],
None
]
]
],
{
Key@"Name",
Key@"ID"
},
{
Key@"Reputation",
"Account":>Replace[Key@"Account",l:Except[None]:>Hyperlink@l]
}
];
Format[s:SEUser[i_Integer,site_]]:=
SummarizedForm[
s,
"SEUser",
None,
{
"ID"->i
},
{
"Site"->site
}
];
$SEQuestionTemplate=
<|
"Title"->"title",
"ID"->"question_id",
"Link"->"link",
"CreationDate"->"creation_date",
"LastActivityDate"->"last_activity_date",
"LastEditDate"->"last_edit_date",
"Owner"->"owner",
"Answers"->"answer_count",
"Views"->"view_count",
"Answered"->"is_answered",
"Score"->"score",
"AcceptedAnswer"->"accepted_answer_id",
"Tags"->"tags"
|>;
SEQuestion[l_List,site_:None]:=
With[{
base=
$SEQuestionTemplate/.
Append[l,(Alternatives@@Values@$SEQuestionTemplate)->None]
},
SEQuestion@
Merge[
{
base,
<|
"Owner"->SEUser@base["Owner"],
"CreationDate"->FromUnixTime@base["CreationDate"],
"LastActivityDate"->FromUnixTime@base["LastActivityDate"],
"LastEditDate"->
Replace[base["LastEditDate"],
d:Except[None]:>FromUnixTime@d
],
"Site"->site,
"AcceptedAnswer"->
Replace[
base["AcceptedAnswer"],
i_Integer:>
SEAnswer[i,
Replace[base["Link"],
s:Except[None]:>URLParse[s]["Domain"]
]
]
]
|>
},
Last]
];
Format[s:SEQuestion[a_Association]]:=
SummarizedForm[
s,
Replace[
a["Score"],
None->0
],
{
"Title"->
Replace[a["Link"],{
_Missing|None->Key@"Title",
l_:>Hyperlink[Key@"Title",l]
}]
},
{
"User"->Key@"Owner",
"ID"->Key@"ID",
"Created"->Key@"CreationDate",
"Answered"->Key@"Answered"
}
];
Format[s:SEQuestion[i_Integer,site_:None]]:=
SummarizedForm[
s,
"SEQuestion",
None,
{
"ID: "->i
},
{
"Site: "->site
}
];
$SEAnswerTemplate=
<|
"Title"->"title",
"Body"->"body",
"Owner"->"owner",
"Question"->"question_id",
"ID"->"answer_id",
"UpVotes"->"down_vote_count",
"DownVotes"->"down_vote_count",
"Score"->"score",
"Accepted"->"is_accepted",
"CreationDate"->"creation_date",
"LastActivityDate"->"last_activity_date",
"LastEditDate"->"last_edit_date"
|>;
SEAnswer[l_List,site_:None]:=
Block[{
answerAssociation=
$SEAnswerTemplate/.
Append[l,(Alternatives@@Values@$SEAnswerTemplate)->None]
},
answerAssociation=
Merge[
{
answerAssociation,
<|
"Owner"->SEUser@answerAssociation["Owner"],
"Question"->
SEQuestion[
answerAssociation["Question"],
site
],
"CreationDate"->
Replace[answerAssociation["CreationDate"],
d:Except[None]:>DateObject@d
],
"LastActivityDate"->
Replace[answerAssociation["LastActivityDate"],
d:Except[None]:>DateObject@d
],
"LastEditDate"->
Replace[answerAssociation["LastEditDate"],
d:Except[None]:>DateObject@d
],
"Site"->site
|>
},
Last];
AppendTo[answerAssociation,
"Link"->
Replace[SELookup[answerAssociation,"Question"],
q_SEQuestion:>
Replace[SELookup[q,"Link",None],
url_String:>
TemplateApply["``#``",
{url,SELookup[answerAssociation,"ID"]}]
]
]
];
SEAnswer@answerAssociation
];
Format[s:SEAnswer[a_Association]]:=
SummarizedForm[
s,
Grid@{
{
Replace[
a["UpVotes"],
None->0
],
Style["\[Checkmark]",Green]},
{
Replace[
a["DownVotes"],
None->0
],
Style["\[Times]",Red]}
},
{""},
{
Replace[a["Link"],{
_Missing|None:>
With[{l=SELookup[SEByID@a["Question"],"Link"]},
Hyperlink[
l<>"#"<>ToString@a["ID"]
]
],
l_:>Hyperlink[l]
}],
"User"->Key@"Owner",
"Question":>Key@"Question",
"ID"->Key@"ID",
"Created"->Key@"CreationDate"
},
a
];
Format[s:SEAnswer[i_Integer,site_String]]:=
SummarizedForm[
s,
"SEAnswer",
None,
{
"ID: "->i
},
{
"Site: "->site
}
];
Options[SEQuestions]=
Normal@$queryParameterFormMap;
SEQuestions[results_Association]:=
With[{s="Site"/.results},
SEQuestion[#,s]&/@("Results"/.results)
];
SEQuestions[call_URL]:=
With[{results=callAPI@call},
Replace[results,
_Association:>SEQuestions@results
]
];
SEQuestions[site:_String|Automatic:Automatic,parameters:OptionsPattern[]]:=
With[{
call=
buildCall[
{"search","advanced"},
Replace[
site,
Automatic->$SEDefaultSite
],
Sequence@@formatParameters@{parameters}
]
},
If[call=!=$Failed,
SEQuestions@URL@call,
Message[StackExchangeAPI::abort];
$Failed
]
];
Options[SEAnswers]=
FilterRules[
Normal@$queryParameterFormMap,
{
"PageNumber",
"NumberOfEntries",
"From",
"To",
"OrderBy",
"SortBy",
"MinSortValue",
"MaxSortValue"
}
];
SEAnswers[data_Association]:=
With[{s="Site"/.data},
SEAnswer[#,s]&/@("Results"/.data)
];
SEAnswers[call_URL]:=
With[{data=callAPI@call},
Replace[data,_Association:>SEAnswers@data]
];
SEAnswers[site:_String|Automatic:Automatic,parameters:OptionsPattern[]]:=
With[{
call=
buildCall[
"answers",
Replace[
site,
Automatic->$SEDefaultSite
],
Sequence@@formatParameters@{parameters}
]
},
If[call=!=$Failed,
SEAnswers@URL@call,
Message[StackExchangeAPI::abort];
$Failed
]
];
Options[SEUsers]=
FilterRules[
Normal@$queryParameterFormMap,
{
"PageNumber",
"NumberOfEntries",
"From",
"To",
"OrderBy",
"SortBy",
"MinSortValue",
"MaxSortValue"
}
];
SEUsers[data_Association]:=
With[{s="Site"/.data},
SEUser[#,s]&/@("Results"/.data)
];
SEUsers[call_URL]:=
With[{data=callAPI@call},
Replace[data,_Association:>SEUsers@data]
];
SEUsers[
site:_String|Automatic:Automatic,
parameters:OptionsPattern[]]:=
With[{
call=
buildCall[
"users",
Replace[
site,
Automatic->$SEDefaultSite
],
Sequence@@formatParameters@{parameters}
]},
If[call=!=$Failed,
SEUsers@URL@call,
Message[StackExchangeAPI::abort];
$Failed
]
];
Options[SESearch]=Normal@$queryParameterFormMap;
SESearch[
site:_String?(MemberQ[Values@$StackExchangeSites,#]&)|Automatic:Automatic,
objects:"Questions"|"Answers"|"Users"|"Q"|"A"|"U"|_List:"Questions",
query:_String|None:None,
ops:OptionsPattern[]]:=
With[{obs=
DeleteCases[Except[SEQuestions|SEAnswers|SEUsers]]@
DeleteDuplicates@
Replace[Flatten@{objects},{
"Questions"|"Q"->SEQuestions,
"Answers"|"A"->SEAnswers,
"Users"|"U"->SEUsers
},
1]},
Replace[
Join@@
DeleteCases[$Failed]@
Table[
Switch[ob,
SEQuestions,
SEQuestions[
site,
Sequence@@
DeleteDuplicatesBy[
{ops,
"SortBy"->"votes",
If[query=!=None,
"FreeFormSearch"->query,
Nothing
]},
First]
],
SEAnswers,
SEAnswers[
site,
Sequence@@
DeleteDuplicatesBy[
{ops,
If[query=!=None,
"FreeFormSearch"->query,
Nothing
]},
First]
],
SEUsers,
SEUsers[
site,
Sequence@@
DeleteDuplicatesBy[
{ops,
If[query=!=None,
"UserName"->query,
Nothing
]},
First]
]
],
{ob,obs}
],
{
{}->None,
{r_}:>r
}]
]
$SEImportFormats=<|
"Code":>("<code>"~~c:Shortest[__]~~"</code>":>c),
"Strings":>
Function[url,
Join@@
StringCases[SEImport[url,"Code"],
"\""~~
s:Shortest[Except["\""]..]
~~"\""~~
(","|" "|EndOfLine|EndOfString):>s
]
]
|>;
SEImport::nourl="No URL associated with ``";
SEImport[
url_String,
format:_String:"Code"]:=
Replace[
$SEImportFormats[format],{
_Missing:>
Import[url,format],
e:(_StringExpression|_Alternatives|_Rule|_RuleDelayed):>
StringCases[Import[url,"Text"],e],
f:(_Function|_Symbol):>
f@url
}];
SEImport[
obj:_SEQuestion|_SEAnswer|_SEUser,
format:_String:"Code"
]:=
Replace[
SELookup[obj,"Link"],{
_Missing:>(Message[SEImport::nourl,obj];$Failed),
url_String:>SEImport[url,format]
}];
chatURL[chatSpec__Integer]:=
"https://chat.stackexchange.com/transcript/"<>(ToString/@{chatSpec});
chatURL[url_String]:=
With[{p=URLParse@url},
chatURL@@
Replace[p,
{___,"transcript",spec__}:>{spec}
]
];
SEChatScrape[chatRoom_]:=
With[{ts=
Column[{First@First@#,
Row@{Spacer[10],
RawBoxes@Cell[Thread[Last@#,TextData],"Text"]}},
Dividers->{{},{2->Gray}}]&/@
Partition[
SplitBy[
StringCases[
Import[chatURL@chatRoom,"Text"],
{
u:("<div class=\"username\">"~~Shortest[__]~~"</div>"):>
{"user",u},
"<div class=\"content\">"~~content:Shortest[__]~~"</div>":>
StringTrim@content(*ImportString[content,"HTML"]*)
}]/.{
{"user",u_}:>
First@StringCases[u,
{
"href=\""~~link__~~"\" "~~__~~">"~~
name__~~"</a></div>":>
Hyperlink[name,"https://chat.stackexchange.com"<>link]
}
],
content_String:>
TextData@
Append[
Replace[
StringReplace[content,
"<code>"~~code:Shortest[__]~~"</code>":>
StyleBox[code,"Input"]],{
s_String:>
{ImportString[s,"HTML"]},
StringExpression[bits__]:>
Riffle[
ReplaceAll[{bits},
s_String:>ImportString[s,"HTML"]
],
" "]
}],
"\n"
]
},
Head
],
2]},
Column[ts,Dividers->Center]~Style~(ShowStringCharacters->False)
]//Panel
$SEAuthURL="https://stackexchange.com/oauth/dialog";
$SEClientID="8553";
$SERedirectURI="https://stackexchange.com/oauth/login_success";
$SEKeyExample=Image[CompressedData["
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