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--- /dev/null
+---
+layout: post
+title: "Fluorine: the library to get things flowing"
+tags: english javascript
+color: cyan
+header_image: fluorine.gif
+description: "Fluorine is a flow based library that makes complex
+async operations really simple."
+---
+
+Today I was happily surprised with the fact that [fluorine ][fluorine]
+has been made publicly available with an MIT License!
+This is a library created by [azendal][azendal]
+as a way to solve some of the more complex flows in [breezi][breezi].
+The problem had been bugging us for a while and the several existing
+solutions to the async problem didn't feel right for it, and then
+fluorine arrived to the [neon][neon] [family][cobalt] [of][thulium]
+[libraries][tellurium].
+
+Fluorine is a really simple flow abstraction for javascript that doesn't
+do much: You can have a *Flow*, which has a series *Steps*; a step has a
+name, a list of dependencies, and a fulfill function. The way it works
+is that flows run automatically, and every step that can be taken *is
+taken*, then its dependents are executed, and so on until all nodes are
+fulfilled. That's all there is to it, and that's all it needs to provide
+powerful asynchronous constructs that can stay decoupled.
+
+But let's code a simple example:
+
+In the following example we're loading an application where we allow our
+user to view a 3D model of their favorite 1985 vintage action figures in
+a fake shelf. We *show a loading screen* while we *get the data for the
+models*, then *fetch the models themselves*, also *request the user data*
+(so we can see their favorites), plus *all the latest posts* from the most
+popular social network for enthusiasts of 1985 vintage action figures
+— G.I. Yo. Once we have the model and user data, we can *display the shelf*
+so the user can see the name of 1985 snowman and finally settle that argument
+with joe about which 1985 vintage action figure is the best 1985 vintage
+action figure, so we have to: *hide the loading scren*, show the models
+with a generic image and *leave a loader in the social network box*.
+Once the models are fetched, we can start *displaying them* in the shelf
+instead of the generic image while it loaded; once we have the social
+networks, we *put the posts in there*. So, that's easy right?, no chance
+of turning *this* into a mess...
+
+![A boring old diagram][fig1]
+*34 indentations later...*
+
+I put this in a diagram with handy color coded arrows so we don't get
+lost. Now we know what operations depend on each other, and that's all we
+need for fluorine. So, we can now turn that diagram into a flow:
+
+<pre class="language-javascript"><code class="language-javascript">
+ var giFlow = new Flow();
+
+ // Top Row Nodes (as shown in the diagram)
+
+ giFlow.step('showLoadingScreen')(function (step) {
+ loadingScreen.show();
+ step.success();
+ });
+
+ giFlow.step('fetchUserData')(function (step) {
+ UserData.fetch(function (userData) {
+ step.success(userData);
+ });
+ });
+
+ giFlow.step('fetchModelData')(function (step) {
+ ModelData.fetch(function (modelData) {
+ step.success(modelData);
+ });
+ });
+
+ giFlow.step('fetchSocialData')(function (step) {
+ SocialData.fetch(function (socialData) {
+ step.success(socialData);
+ });
+ });
+
+ // Middle Row Nodes (as shown in the diagram)
+
+ giFlow.step('hideLoadingScreen').dependsOn('showLoadingScreen', 'fetchUserData', 'fetchModelData')(function (step) {
+ loadingScreen.hide();
+ step.success();
+ });
+
+ giFlow.step('displayPlaceholderSocialBox').dependsOn('fetchUserData', 'fetchModelData')(function (step) {
+ socialBox.display(function () {
+ step.success();
+ });
+ });
+
+ giFlow.step('displayModelShelf').dependsOn('fetchUserData', 'fetchModelData')(function (step) {
+ modelShelf.display(step.data.fetchUserData, step.data.fetchModelData, function () {
+ step.success();
+ });
+ });
+
+ giFlow.step('fetchModels').dependsOn('fetchModelData')(function (step) {
+ Model.fetch(step.data.fetchModelData, function () {
+ step.success();
+ });
+ });
+
+ // Bottom Row Nodes (as shown in the diagram)
+
+ giFlow.step('fillInGIYoPosts').dependsOn('fetchSocialData', 'displayPlaceholderSocialBox')(function (step) {
+ socialBox.fillInGIYOPosts(step.data.fetchSocialData, function () {
+ step.success();
+ });
+ });
+
+ giFlow.step('replaceModels').dependsOn('fetchModels', 'displayModelShelf')(function (step) {
+ modelShelf.replaceModels(step.data.fetchModels, function () {
+ step.success();
+ });
+ });
+</code></pre>
+
+That's all there is to fluorine: you define steps, you fulfill them.
+Every step may have dependents, and it can access their data from the
+callback! Now you can define complex operations step by step, you could
+create complex branching by not triggering a step's success method.
+Another important part of fluorine is that modifying flows is really
+easy, as long as you have clearly defined nodes, you can just move
+around dependencies to alter the way the program runs!
+You can even check your work against the spec by converting it
+to dot format (eg. `giFlow.toDot()`):
+
+ digraph {
+ showLoadingScreen
+ fetchUserData
+ fetchModelData
+ fetchSocialData
+ hideLoadingScreen
+ showLoadingScreen -> hideLoadingScreen
+ fetchUserData -> hideLoadingScreen
+ fetchModelData -> hideLoadingScreen
+ displayPlaceholderSocialBox
+ fetchUserData -> displayPlaceholderSocialBox
+ fetchModelData -> displayPlaceholderSocialBox
+ displayModelShelf
+ fetchUserData -> displayModelShelf
+ fetchModelData -> displayModelShelf
+ fetchModels
+ fetchModelData -> fetchModels
+ fillInGIYoPosts
+ fetchSocialData -> fillInGIYoPosts
+ displayPlaceholderSocialBox -> fillInGIYoPosts
+ replaceModels
+ fetchModels -> replaceModels
+ displayModelShelf -> replaceModels
+ }
+
+ dot -Tpng that_file_up_there.dot -o fancy_graphic.png
+
+![Fancy Graphic][fig2]
+
+They look the same (ish)! It even did a better job at putting it together!
+
+So that's fluorine, a pretty simple flow tool that can let you build
+complex stuff, you could implement a neural network, or a behavior tree
+for a game actor, or a loop of events, or do some complex distributed
+tasks, you can use it for almost anything as long as you can graph it,
+because that's all it really is: graphs. You could even create dynamic
+nodes and have a flow that is created programatically!
+
+I hope that example was enough to get you interested on how you can use
+it now that it's open to everyone! Have fun :D
+
+[fluorine]: https://github.com/freshout-dev/fluorine
+[azendal]: https://github.com/azendal
+[breezi]: https://breezi.com
+[neon]: https://azendal.github.io/neon
+[cobalt]: https://github.com/benbeltran/cobalt
+[thulium]: https://freshout-dev.github.io/thulium
+[tellurium]: https://github.com/azendal/tellurium
+[fig1]: https://docs.google.com/drawings/d/1a3xVTO0qfSqt_fKWuKzeQFGbtOvQbfVV63_nGD5xcq0/pub?w=960&h=720
+[fig2]: http://ns.vc/nXBk.png
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+code {overflow-wrap: normal}
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+Prism.languages.c=Prism.languages.extend("clike",{keyword:/\b(asm|typeof|inline|auto|break|case|char|const|continue|default|do|double|else|enum|extern|float|for|goto|if|int|long|register|return|short|signed|sizeof|static|struct|switch|typedef|union|unsigned|void|volatile|while)\b/g,operator:/[-+]{1,2}|!=?|<{1,2}=?|>{1,2}=?|\->|={1,2}|\^|~|%|(&){1,2}|\|?\||\?|\*|\//g});Prism.languages.insertBefore("c","keyword",{property:{pattern:/#[a-zA-Z]+\ .*/g,inside:{property:/<[a-zA-Z.]+>/g}}});;
+Prism.languages.python={comment:{pattern:/(^|[^\\])#.*?(\r?\n|$)/g,lookbehind:!0},string:/"""[\s\S]+?"""|("|')(\\?.)*?\1/g,keyword:/\b(as|assert|break|class|continue|def|del|elif|else|except|exec|finally|for|from|global|if|import|in|is|lambda|pass|print|raise|return|try|while|with|yield)\b/g,"boolean":/\b(True|False)\b/g,number:/\b-?(0x)?\d*\.?[\da-f]+\b/g,operator:/[-+]{1,2}|=?<|=?>|!|={1,2}|(&){1,2}|(&){1,2}|\|?\||\?|\*|\/|~|\^|%|\b(or|and|not)\b/g,ignore:/&(lt|gt|amp);/gi,punctuation:/[{}[\];(),.:]/g};;
+Prism.languages.sql={comment:{pattern:/(^|[^\\])(\/\*[\w\W]*?\*\/|((--)|(\/\/)|#).*?(\r?\n|$))/g,lookbehind:!0},string:/("|')(\\?.)*?\1/g,keyword:/\b(ACTION|ADD|AFTER|ALGORITHM|ALTER|ANALYZE|APPLY|AS|ASC|AUTHORIZATION|BACKUP|BDB|BEGIN|BERKELEYDB|BIGINT|BINARY|BIT|BLOB|BOOL|BOOLEAN|BREAK|BROWSE|BTREE|BULK|BY|CALL|CASCADE|CASCADED|CASE|CHAIN|CHAR VARYING|CHARACTER VARYING|CHECK|CHECKPOINT|CLOSE|CLUSTERED|COALESCE|COLUMN|COLUMNS|COMMENT|COMMIT|COMMITTED|COMPUTE|CONNECT|CONSISTENT|CONSTRAINT|CONTAINS|CONTAINSTABLE|CONTINUE|CONVERT|CREATE|CROSS|CURRENT|CURRENT_DATE|CURRENT_TIME|CURRENT_TIMESTAMP|CURRENT_USER|CURSOR|DATA|DATABASE|DATABASES|DATETIME|DBCC|DEALLOCATE|DEC|DECIMAL|DECLARE|DEFAULT|DEFINER|DELAYED|DELETE|DENY|DESC|DESCRIBE|DETERMINISTIC|DISABLE|DISCARD|DISK|DISTINCT|DISTINCTROW|DISTRIBUTED|DO|DOUBLE|DOUBLE PRECISION|DROP|DUMMY|DUMP|DUMPFILE|DUPLICATE KEY|ELSE|ENABLE|ENCLOSED BY|END|ENGINE|ENUM|ERRLVL|ERRORS|ESCAPE|ESCAPED BY|EXCEPT|EXEC|EXECUTE|EXIT|EXPLAIN|EXTENDED|FETCH|FIELDS|FILE|FILLFACTOR|FIRST|FIXED|FLOAT|FOLLOWING|FOR|FOR EACH ROW|FORCE|FOREIGN|FREETEXT|FREETEXTTABLE|FROM|FULL|FUNCTION|GEOMETRY|GEOMETRYCOLLECTION|GLOBAL|GOTO|GRANT|GROUP|HANDLER|HASH|HAVING|HOLDLOCK|IDENTITY|IDENTITY_INSERT|IDENTITYCOL|IF|IGNORE|IMPORT|INDEX|INFILE|INNER|INNODB|INOUT|INSERT|INT|INTEGER|INTERSECT|INTO|INVOKER|ISOLATION LEVEL|JOIN|KEY|KEYS|KILL|LANGUAGE SQL|LAST|LEFT|LIMIT|LINENO|LINES|LINESTRING|LOAD|LOCAL|LOCK|LONGBLOB|LONGTEXT|MATCH|MATCHED|MEDIUMBLOB|MEDIUMINT|MEDIUMTEXT|MERGE|MIDDLEINT|MODIFIES SQL DATA|MODIFY|MULTILINESTRING|MULTIPOINT|MULTIPOLYGON|NATIONAL|NATIONAL CHAR VARYING|NATIONAL CHARACTER|NATIONAL CHARACTER VARYING|NATIONAL VARCHAR|NATURAL|NCHAR|NCHAR VARCHAR|NEXT|NO|NO SQL|NOCHECK|NOCYCLE|NONCLUSTERED|NULLIF|NUMERIC|OF|OFF|OFFSETS|ON|OPEN|OPENDATASOURCE|OPENQUERY|OPENROWSET|OPTIMIZE|OPTION|OPTIONALLY|ORDER|OUT|OUTER|OUTFILE|OVER|PARTIAL|PARTITION|PERCENT|PIVOT|PLAN|POINT|POLYGON|PRECEDING|PRECISION|PREV|PRIMARY|PRINT|PRIVILEGES|PROC|PROCEDURE|PUBLIC|PURGE|QUICK|RAISERROR|READ|READS SQL DATA|READTEXT|REAL|RECONFIGURE|REFERENCES|RELEASE|RENAME|REPEATABLE|REPLICATION|REQUIRE|RESTORE|RESTRICT|RETURN|RETURNS|REVOKE|RIGHT|ROLLBACK|ROUTINE|ROWCOUNT|ROWGUIDCOL|ROWS?|RTREE|RULE|SAVE|SAVEPOINT|SCHEMA|SELECT|SERIAL|SERIALIZABLE|SESSION|SESSION_USER|SET|SETUSER|SHARE MODE|SHOW|SHUTDOWN|SIMPLE|SMALLINT|SNAPSHOT|SOME|SONAME|START|STARTING BY|STATISTICS|STATUS|STRIPED|SYSTEM_USER|TABLE|TABLES|TABLESPACE|TEMPORARY|TEMPTABLE|TERMINATED BY|TEXT|TEXTSIZE|THEN|TIMESTAMP|TINYBLOB|TINYINT|TINYTEXT|TO|TOP|TRAN|TRANSACTION|TRANSACTIONS|TRIGGER|TRUNCATE|TSEQUAL|TYPE|TYPES|UNBOUNDED|UNCOMMITTED|UNDEFINED|UNION|UNPIVOT|UPDATE|UPDATETEXT|USAGE|USE|USER|USING|VALUE|VALUES|VARBINARY|VARCHAR|VARCHARACTER|VARYING|VIEW|WAITFOR|WARNINGS|WHEN|WHERE|WHILE|WITH|WITH ROLLUP|WITHIN|WORK|WRITE|WRITETEXT)\b/gi,"boolean":/\b(TRUE|FALSE|NULL)\b/gi,number:/\b-?(0x)?\d*\.?[\da-f]+\b/g,operator:/\b(ALL|AND|ANY|BETWEEN|EXISTS|IN|LIKE|NOT|OR|IS|UNIQUE|CHARACTER SET|COLLATE|DIV|OFFSET|REGEXP|RLIKE|SOUNDS LIKE|XOR)\b|[-+]{1}|!|=?<|=?>|={1}|(&){1,2}|\|?\||\?|\*|\//gi,ignore:/&(lt|gt|amp);/gi,punctuation:/[;[\]()`,.]/g};;
+Prism.languages.http={"request-line":{pattern:/^(POST|GET|PUT|DELETE|OPTIONS|PATCH|TRACE|CONNECT)\b\shttps?:\/\/\S+\sHTTP\/[0-9.]+/g,inside:{property:/^\b(POST|GET|PUT|DELETE|OPTIONS|PATCH|TRACE|CONNECT)\b/g,"attr-name":/:\w+/g}},"response-status":{pattern:/^HTTP\/1.[01] [0-9]+.*/g,inside:{property:/[0-9]+[A-Z\s-]+$/g}},keyword:/^[\w-]+:(?=.+)/gm};var httpLanguages={"application/json":Prism.languages.javascript,"application/xml":Prism.languages.markup,"text/xml":Prism.languages.markup,"text/html":Prism.languages.markup};for(var contentType in httpLanguages)if(httpLanguages[contentType]){var options={};options[contentType]={pattern:new RegExp("(content-type:\\s*"+contentType+"[\\w\\W]*?)\\n\\n[\\w\\W]*","gi"),lookbehind:!0,inside:{rest:httpLanguages[contentType]}};Prism.languages.insertBefore("http","keyword",options)};;
+/**
+ * Original by Samuel Flores
+ *
+ * Adds the following new token classes:
+ * constant, builtin, variable, symbol, regex
+ */Prism.languages.ruby=Prism.languages.extend("clike",{comment:/#[^\r\n]*(\r?\n|$)/g,keyword:/\b(alias|and|BEGIN|begin|break|case|class|def|define_method|defined|do|each|else|elsif|END|end|ensure|false|for|if|in|module|new|next|nil|not|or|raise|redo|require|rescue|retry|return|self|super|then|throw|true|undef|unless|until|when|while|yield)\b/g,builtin:/\b(Array|Bignum|Binding|Class|Continuation|Dir|Exception|FalseClass|File|Stat|File|Fixnum|Fload|Hash|Integer|IO|MatchData|Method|Module|NilClass|Numeric|Object|Proc|Range|Regexp|String|Struct|TMS|Symbol|ThreadGroup|Thread|Time|TrueClass)\b/,constant:/\b[A-Z][a-zA-Z_0-9]*[?!]?\b/g});Prism.languages.insertBefore("ruby","keyword",{regex:{pattern:/(^|[^/])\/(?!\/)(\[.+?]|\\.|[^/\r\n])+\/[gim]{0,3}(?=\s*($|[\r\n,.;})]))/g,lookbehind:!0},variable:/[@$]+\b[a-zA-Z_][a-zA-Z_0-9]*[?!]?\b/g,symbol:/:\b[a-zA-Z_][a-zA-Z_0-9]*[?!]?\b/g});;
+Prism.languages.csharp=Prism.languages.extend("clike",{keyword:/\b(abstract|as|base|bool|break|byte|case|catch|char|checked|class|const|continue|decimal|default|delegate|do|double|else|enum|event|explicit|extern|false|finally|fixed|float|for|foreach|goto|if|implicit|in|int|interface|internal|is|lock|long|namespace|new|null|object|operator|out|override|params|private|protected|public|readonly|ref|return|sbyte|sealed|short|sizeof|stackalloc|static|string|struct|switch|this|throw|true|try|typeof|uint|ulong|unchecked|unsafe|ushort|using|virtual|void|volatile|while|add|alias|ascending|async|await|descending|dynamic|from|get|global|group|into|join|let|orderby|partial|remove|select|set|value|var|where|yield)\b/g,string:/@?("|')(\\?.)*?\1/g,preprocessor:/^\s*#.*/gm,number:/\b-?(0x)?\d*\.?\d+\b/g});;
+Prism.languages.go=Prism.languages.extend("clike",{keyword:/\b(break|case|chan|const|continue|default|defer|else|fallthrough|for|func|go(to)?|if|import|interface|map|package|range|return|select|struct|switch|type|var)\b/g,builtin:/\b(bool|byte|complex(64|128)|error|float(32|64)|rune|string|u?int(8|16|32|64|)|uintptr|append|cap|close|complex|copy|delete|imag|len|make|new|panic|print(ln)?|real|recover)\b/g,"boolean":/\b(_|iota|nil|true|false)\b/g,operator:/([(){}\[\]]|[*\/%^!]=?|\+[=+]?|-[>=-]?|\|[=|]?|>[=>]?|<(<|[=-])?|==?|&(&|=|^=?)?|\.(\.\.)?|[,;]|:=?)/g,number:/\b(-?(0x[a-f\d]+|(\d+\.?\d*|\.\d+)(e[-+]?\d+)?)i?)\b/ig,string:/("|'|`)(\\?.|\r|\n)*?\1/g});delete Prism.languages.go["class-name"];;
+Prism.languages.aspnet=Prism.languages.extend("markup",{"page-directive tag":{pattern:/<%\s*@.*%>/gi,inside:{"page-directive tag":/<%\s*@\s*(?:Assembly|Control|Implements|Import|Master|MasterType|OutputCache|Page|PreviousPageType|Reference|Register)?|%>/gi,rest:Prism.languages.markup.tag.inside}},"directive tag":{pattern:/<%.*%>/gi,inside:{"directive tag":/<%\s*?[$=%#:]{0,2}|%>/gi,rest:Prism.languages.csharp}}}),Prism.languages.insertBefore("inside","punctuation",{"directive tag":Prism.languages.aspnet["directive tag"]},Prism.languages.aspnet.tag.inside["attr-value"]),Prism.languages.insertBefore("aspnet","comment",{"asp comment":/<%--[\w\W]*?--%>/g}),Prism.languages.insertBefore("aspnet",Prism.languages.javascript?"script":"tag",{"asp script":{pattern:/<script(?=.*runat=['"]?server['"]?)[\w\W]*?>[\w\W]*?<\/script>/gi,inside:{tag:{pattern:/<\/?script\s*(?:\s+[\w:-]+(?:=(?:("|')(\\?[\w\W])*?\1|\w+))?\s*)*\/?>/gi,inside:Prism.languages.aspnet.tag.inside},rest:Prism.languages.csharp||{}}}}),Prism.languages.aspnet.style&&(Prism.languages.aspnet.style.inside.tag.pattern=/<\/?style\s*(?:\s+[\w:-]+(?:=(?:("|')(\\?[\w\W])*?\1|\w+))?\s*)*\/?>/gi,Prism.languages.aspnet.style.inside.tag.inside=Prism.languages.aspnet.tag.inside),Prism.languages.aspnet.script&&(Prism.languages.aspnet.script.inside.tag.pattern=Prism.languages.aspnet["asp script"].inside.tag.pattern,Prism.languages.aspnet.script.inside.tag.inside=Prism.languages.aspnet.tag.inside);;
+undefined;
git.r.bdr.sh / rbdr / r.bdr.sh / commitdiff
