GrafoscopioUtils/repository/Grafoscopio-Utils/GrafoscopioUtils.class.st

"
I contain simple general functionality used by Grafoscopio, Dataviz 
or other related projects.
"
Class {
	#name : #GrafoscopioUtils,
	#superclass : #Object,
	#category : #'Grafoscopio-Utils'
}

{ #category : #utilities }
GrafoscopioUtils class >> checksumFor: aFileReference [
	^ (SHA1 new hashMessage: aFileReference binaryReadStream contents) hex.
]

{ #category : #'graphical interface' }
GrafoscopioUtils class >> downloadingFrom: downloadUrl withMessage: aString into: location [
	| fileName |
	fileName := (self sanitize: downloadUrl) segments last.
	(location / fileName) ensureDelete.
	[: bar |
		bar title: aString.
		[ZnClient new
			enforceHttpSuccess: true;
			url: downloadUrl;
			downloadTo: location;
			signalProgress: true
		]
			on: HTTPProgress  
			do: [ :progress |
				progress isEmpty ifFalse: [ bar current: progress percentage ].
				progress resume ].
	] asJob run.
]

{ #category : #'graphical interface' }
GrafoscopioUtils class >> getContentsFrom: url withMessage: aString [
	| client |
	[: bar |
		bar title: aString.
		[client := ZnClient new
			enforceHttpSuccess: true;
			get: (url);
			signalProgress: true
		]
			on: HTTPProgress  
			do: [ :progress |
				progress isEmpty ifFalse: [ bar current: progress percentage ].
				progress resume ].
	] asJob run.
	^ client contents.
]

{ #category : #utilities }
GrafoscopioUtils class >> perform: aString on: anObject [

	| msg |
	msg := self selectorAndArgumentsFrom: aString.
	msg 
		at: 'args'
		ifPresent: [ ^ anObject perform: (msg at: 'selector') withArguments: (msg at: 'args') ]
		ifAbsent: [ ^ anObject perform: (msg at: 'selector') ]
]

{ #category : #private }
GrafoscopioUtils class >> sanitize: url [
	"I remove white spaces in url's and prepend 'http://' to urls when it is ommited, so
	operations that rely on sane and well formed urls don't throw error messages."
	| sanitized modUrl |
	modUrl := url.
	[modUrl endsWith: ' ']
		whileTrue: [ modUrl := modUrl copyFrom: 1 to: (modUrl size - 1)  ].
	(url beginsWith: 'http://') 
		ifFalse: [ sanitized := ('http://', modUrl) asUrl ]
		ifTrue: [ sanitized := modUrl asUrl ].
	^ sanitized
]

{ #category : #utilities }
GrafoscopioUtils class >> selectorAndArgumentsFrom: aString [
	"I return from aString a symbol that contains a message and an array of arguments used in it"
	| msgArray answer |
	answer := OrderedDictionary new.
	msgArray := aString splitOn: ':'.
	msgArray size = 1 
		ifTrue: [ 
			^ answer
				at: 'selector' put: (msgArray at: 1) asSymbol;
				yourself ].
	msgArray size = 2
		ifTrue: [ 
			^ answer
				at: 'selector' put: ((msgArray at: 1),':') asSymbol;
				at: 'args' put: (Array with: (msgArray at: 2)); 
				yourself ].
]

{ #category : #updating }
GrafoscopioUtils class >> update [
	"Updates GrafoscopioUtils with new versions of itself take from the source code repository."
	Gofer new 
		smalltalkhubUser: 'Offray' project: 'Grafoscopio';
   		package: 'Grafoscopio-Utils';
    	load.
]