OpenAF processor template

The output=template option uses javascript Handlebars library.

Additionally OpenAF processor uses the following Handlebars custom helpers.

🎯 Generic OpenAF helpers

Here are some of the available helpers:

Helper	Description
$stringify	shows a JSON representation of the provided parameter
$stringifyInLine	shows a JSON representation, without spaces, of the provided parameter
$toYAML	shows the YAML version of the parameter
$toJSON	shows the JSON version of the parameter
$env	shows the current environment variable identified by the parameter
$escape	shows an escaped version of the parameter
$acolor	shows an ansi color (first argument) escape sequence of the string parameter (second argument)
$f	uses the $f format function
$ft	uses the $ft format function
$path	uses the $path function to query objects
$from	uses the $from & fromNLinq to query objects
$toSLON	shows the ow.format.toSLON version of an object
$get	shows the corresponding value for a key on $get
$getObj	equivalent to $get with the extra parameter for $$.get path
$dateDiff	shows a number of seconds for a provided date optionally (second argument) with minutes, hours, days, months, weeks or years and (third argument) a default value
$switch	equivalent to a javascript switch
$case	to be used with $switch for each case
$default	to be used with $switch for each case
$pbar	shows an ansi ascii progress bar with a value and a max value, a min value, a size, an indicator and space char
$pbars	shows an ansi ascii tree of progress bars with a format string: “unit path:color:legend… [-min:0] [-max:100] [-hsize:40]”
$ptable	shows an ansi ascii printTable representation of an object
$ptree	shows an ansi ascii printTree representation of an object
$pchart	shows an ansi ascii line chart with an object and a format string: “unit path:color:legend… [-min:0] [-max:100] [-hsize:40] [-vsize:10]”
$output	shows an $output representation of an object (aObj as 1st arg and options in slon as 2nd arg)
$cjson	shows an ansi ascii colority representation fo an object
$cslon	shows an ansi ascii colored SLON representation of an object
$pmap	shows an ansi ascii printMap representation of an object
$jsmap	shows a HTML representation of an object
$t	given a template and an object instance, as arguments, will process and return the template
$date	converts the argument provided to date
$isoDate	converts the argument provided to an ISO date string
$number	casts the argument provided to number
$boolean	casts the argument provided to boolean
$string	casts the argument provided to string
$keys	shows an array of keys of the provided map
$values	shows an array of values of the provided map
$alen	shows the ansi length of the argument provided
$len	shows the string length of the argument provided
$repeat	shortcut to the OpenAF’s repeat function
$range	shortcut to the OpenAF’s range function
$a2m	shortcut to the OpenAF’s $a2m function
$a4m	shortcut to the OpenAF’s $a4m function
$m2a	shortcut to the OpenAF’s $m2a function
$m4a	shortcut to the OpenAF’s $m4a function
$pass	shows an empty string
$sline	shortcut to the OpenAF’s format withSideLine
$set	block set of a provided key
$concat	concatenates all arguments as a single value

🤨 Conditional helpers

Here are some of the available conditional helpers:

Helper	Description
and	Enables building a block that runs if A ‘and’ B is true
compare	Enables building a block evaluating ‘A’ ‘operation’ ‘B’. Operation can be: ==, ===, !=, !==, <, >, <=, >= and typeof
contains	Enables building a block that runs if string ‘A’ contains string ‘B’
gt	Enables building a block that runs if ‘A’ is greater than ‘B’
gte	Enables building a block that runs if ‘A’ is greater or equal than ‘B’
startsWith	Enables building a block that runs if string ‘A’ starts with ‘B’
endsWith	Enables building a block that runs if string ‘A’ ends with ‘B’
match	Enables building a block that runs if string ‘A’ matchs regular expression ‘B’
has	Enables building a block that runs if map or array ‘A’ has ‘B’ property or element.
eq	Enables building a block that runs if ‘A’ equals to ‘B’
ifEven	Enables building a block that runs if ‘A’ is even
ifOdd	Enables building a block that runs if ‘A’ is odd
is	Enables building a block that runs if ‘A’ is ‘B’
isnt	Enables building a block that runs if ‘A’ isn’t ‘B’
lt	Enables building a block that runs if ‘A’ is lower than ‘B’
lte	Enables building a block that runs if ‘A’ is lower or equal than ‘B’
neither	Enables building a block that runs if ‘A’ and ‘B’ are not defined or false
or	Enables building a block that runs if A ‘or’ B is true
unlessEq	Enables building a block that runs unless ‘A’ equals to ‘B’
unlessGt	Enables building a block that runs unless ‘A’ greater than ‘B’
unlessLt	Enables building a block that runs unless ‘A’ lower than ‘B’
unlessGteq	Enables building a block that runs unless ‘A’ greater than or equals ‘B’
unlessLteq	Enables building a block that runs unless ‘A’ lower than or equals ‘B’

See examples in https://assemble.io/helpers/helpers-comparison.html

📝 Examples

Weather JSON output to a markdown report

Taking the JSON output from a weather service and converting it into a markdown report.

Let’s start by creating the HandleBars template (save it as weather.hbs):

# Weather report (, )

## Currently ()


| |
|---|
| 🌡️   with a temperature of °C (°F) - feels like °C ()°F |
| 💨  km/h ( miles/h) winds from the . |
| 💦 % humidity. |
| ☔️ mm of precipitation expected. |
| 🌥️  % cloud cover. |
| 🌫️  Visibility is  km ( miles) |
| 🛞  Pressure is  mbar. |
| 🌞 UV index is . |
| 🌞 The sun rises at  and sets at . |
| 🌙 The moon rises at  and sets at . |
| 🌙 The moon phase is . |


## Forecast


### 

| Hour | Weather | Temperature | Feels like | Wind | Humidity | Precipitation | Visibility | Pressure | UV Index |
|---|---|---|---|---|---|---|---|---|---|

|  |  | °C (°F) | °C (°F) |  km/h ( miles/h) from the  | % | mm |  km ( miles) |  mbar |  |

---

Now execute (changing the location if needed):

# Using oafp to parse the generated markdown
curl -s "wttr.in/Paris?view=j1" | oafp output=template template=weather.hbs | oafp input=md

# Saving the generated markdown
curl -s "wttr.in/New%20York?view=j1" | oafp output=template template=weather.hbs > weather.md