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[
// Flickr API Connector for Lasso
// (c) 2007 Pieter Claerhout, SHpartners
// www.shpartners.com
// Define the FlickrAPI type
Define_Type(
'shp_FlickrApi',
-prototype,
-description='Implements the Flickr API .'
);
// The local variables to use
local: 'ApiKey' = string;
// onCreate
Define_Tag: 'oncreate', -req='ApiKey';
// Remember the API key
self->ApiKey = #ApiKey;
/Define_Tag;
// Define the flickrRequest tag
Define_Tag: 'Request', -Required='Method', -Required='Params', -EncodeNone;
// The rest url for Flickr
local:'flickrRestUrl' = 'http://api.flickr.com/services/rest/';
// Construct the url parameters
local:'urlParams' = (Array: 'method'=#Method, 'api_key'=self->ApiKey, 'nojsoncallback'=1, 'format'='json');
Iterate(#Params->Keys, (local: 'key'));
#urlParams->Insert(#key=#Params->find(#key));
/Iterate;
// Perform the Flickr Request
local:'Result' = (Include_URL: #flickrRestUrl, -GETParams=#urlParams);
// Decode the result
local:'DecodedResult' = self->DecodeJSON(#Result);
// Check the status of the request
If: #DecodedResult->find('stat') == 'fail';
Fail: #DecodedResult->find('code'), #DecodedResult->find('message');
/If;
// Return the decoded result
Return: #DecodedResult;
/Define_Tag;
// Define the flickrPhotoUrl tag
Define_Tag: 'PhotoUrl', -Required='Photo', -Required='Size', -EncodeNone;
// The list of known sizes
local:'KnownSizes' = (Map: 'square'='_s', 'thumb'='_t', 'small'='_m', 'medium'='', 'large'='_b');
// Get the size
If: #KnownSizes->Find(#Size) == null;
local:'photo_size' = '';
Else;
local:'photo_size' = #KnownSizes->Find(#Size);
/If;
// Construct the url
local:'Url' = "http://farm" + #Photo->find('farm') + ".static.flickr.com/" + #Photo->find('server') + "/" + #Photo->find('id') + "_" + #Photo->find('secret') + #photo_size + ".jpg";
// Return the url
Return: #Url;
/Define_Tag;
// Get the page url for a photo
Define_Tag: 'PhotoPage', -Required='Photo', -Required='UserId', -EncodeNone;
// Return the url
Return: 'http://www.flickr.com/photos/' + #UserId + '/' + #Photo->find('id');
/Define_Tag;
// Get information about a person
Define_Tag: 'PeopleGetInfo', -Required='UserId', -EncodeNone;
// Perform the Flickr request
local:'Result' = self->Request(
-Method = 'flickr.people.getInfo',
-Params = (Map: 'user_id' = #UserId)
);
// Return the result
Return: #Result->find('person');
/Define_Tag;
// Custom JSON decoder (because of a bug in the default library that doesn't always interpret numbers correctly)
Define_Tag: 'DecodeJSON', -Required='value';
(#value == '') ? Return: Null;
Define_Tag: 'consume_string', -Required='ibytes';
Local: 'obytes' = bytes;
local: 'temp' = 0;
While: ((#temp := #ibytes->(export8bits: #temp)) != 34);
#obytes->(import8bits: #temp);
(#temp == 92) ? #obytes->(import8bits: #ibytes->export8bits); // Escape \
/While;
Local: 'output' = ((String: #obytes)->(Replace: '\\"', '\"') & (Replace: '\\r', '\r') & (Replace: '\\n', '\n') & (Replace: '\\t', '\t') & (Replace: '\\f', '\f') & (Replace: '\\b', '\b') &);
If: #output->(BeginsWith: '<LassoNativeType>') && #output->(EndsWith: '</LassoNativeType>');
Local: 'temp' = #output - '<LassoNativeType>' - '</LassoNativeType>';
Local: 'output' = null;
Protect;
#output->(Deserialize: #temp);
/Protect;
/If;
Return: @#output;
/Define_Tag;
Define_Tag: 'consume_token', -Required='ibytes', -required='temp';
Local: 'obytes' = bytes->(import8bits: #temp) &;
local: 'delimit' = (array: 9, 10, 13, 32, 44, 58, 93, 125); // \t\r\n ,:]}
While: (#delimit !>> (#temp := #ibytes->export8bits));
#obytes->(import8bits: #temp);
/While;
Local: 'output' = (String: #obytes);
If: (#output == 'true') || (#output == 'false');
Return: (Boolean: #output);
Else: (#output == 'null');
Return: Null;
Else: (String_IsNumeric: #output);
Return: (#output >> '.') ? (Decimal: #output) | (Integer: #output);
/If;
Return: @#output;
/Define_Tag;
Define_Tag: 'consume_array', -Required='ibytes';
Local: 'output' = array;
local: 'delimit' = (array: 9, 10, 13, 32, 44); // \t\r\n ,
local: 'temp' = 0;
While: ((#temp := #ibytes->export8bits) != 93); // ]
If: (#delimit >> #temp);
Else: (#temp == 34); // "
#output->(insert: (consume_string: @#ibytes));
Else: (#temp == 91); // [
#output->(insert: (consume_array: @#ibytes));
Else: (#temp == 123); // {
#output->(insert: (consume_object: @#ibytes));
Else;
#output->(insert: (consume_token: @#ibytes, @#temp));
(#temp == 93) ? Loop_Abort;
/If;
/While;
Return: @#output;
/Define_Tag;
Define_Tag: 'consume_object', -Required='ibytes';
Local: 'output' = map;
local: 'delimit' = (array: 9, 10, 13, 32, 44); // \t\r\n ,
local: 'temp' = 0;
local: 'key' = null;
local: 'val' = null;
While: ((#temp := #ibytes->export8bits) != 125); // }
If: (#delimit >> #temp);
// Discard whitespace
Else: (#key !== null) && (#temp == 34); // "
#output->(insert: #key = (consume_string: @#ibytes));
#key = null;
Else: (#key !== null) && (#temp == 91); // [
#output->(insert: #key = (consume_array: @#ibytes));
#key = null;
Else: (#key !== null) && (#temp == 123); // {
#output->(insert: #key = (consume_object: @#ibytes));
#key = null;
Else: (#key !== null);
#output->(insert: #key = (consume_token: @#ibytes, @#temp));
(#temp == 125) ? Loop_abort;
#key = null;
Else;
#key = (consume_string: @#ibytes);
while(#delimit >> (#temp := #ibytes->export8bits));
/while;
#temp != 58 ? Loop_Abort;
/If;
/While;
If: (#output >> '__jsonclass__') && (#output->(Find: '__jsonclass__')->(isa: 'array')) && (#output->(Find: '__jsonclass__')->size >= 2) && (#output->(Find: '__jsonclass__')->First == 'deserialize');
Return: #output->(find: '__jsonclass__')->Second->First;
Else: (#output >> 'native') && (#output >> 'comment') && (#output->(find: 'comment') == 'http://www.lassosoft.com/json');
Return: #output->(find: 'native');
/If;
Return: @#output;
/Define_Tag;
Local: 'ibytes' = (bytes: #value);
Local: 'start' = 1;
#ibytes->removeLeading(BOM_UTF8);
Local: 'temp' = #ibytes->export8bits;
If: (#temp == 91); // [
Local: 'output' = (consume_array: @#ibytes);
Return: @#output;
Else: (#temp == 123); // {
Local: 'output' = (consume_object: @#ibytes);
Return: @#output;
/If;
/Define_Tag;
/Define_Type;
]
|
