params-helper

Index

• Definitions
  • validation-def
  • mop-fields-opts-def
• Symbols
  • uuid-pattern
• Functions
  • extract-field-value
  • is-uuid
  • mop-fields
  • uuid
  • uuid-as-string
  • validate-and-mop!!

Definitions

Patterns for some maps passed to the functions as arguments:

• validation-def ^map

  
  

key	value	description	mandatory extra key	optional extra key
:validate/type	:validate/mandatory	validates if field is present	-	:validate/message ^string with %s being field name
:validate/type	:validate/max	validates if max is not reached	:validate/value ˆint	:validate/message ^string with 1st %s being field name, 2nd being max value :validate/ignore-if-absent ^boolean to ignore validation for absent field
:validate/type	:validate/min	validates if at least min value is reached	:validate/value ˆint	:validate/message ^string with 1st %s being field name, 2nd being min value :validate/ignore-if-absent ^boolean to ignore validation for absent field
:validate/type	:validate/regex	validates if string matches regex pattern	:validate/value ˆregex	:validate/message ^string with %s being field name :validate/ignore-if-absent ^boolean to ignore validation for absent field
:validate/type	:validate/custom	validates if custom fn receiving the value returns true	:validate/value ^fn	:validate/message ^string with %s being field name :validate/ignore-if-absent ^boolean to ignore validation for absent field

• Examples:

  {"field-name"
    [{:validate/type :validate/mandatory, :validate/message "%s is ..."},
     {:validate/type :validate/min, :validate/value 12, :validate/message "%s is mandatory"},
     {:validate/type :validate/max, :validate/value 40, :validate/message "%s is ..."},
     {:validate/type :validate/regex, :validate/value #"^[\d]{1,2}$", :validate/message "%s is ..."},
     {:validate/type :validate/custom, :validate/value fn, :validate/message "% is ..."}]}

• mop-fields opts ^map

  
  

key	value / default	description
:ignore-uuid	boolean / false	ignores string to uuid conversion, making the algorithm a bit faster

• Examples:

  {:ignore-uuid true}

Symbols

• uuid-pattern
  

  UUID string regex

Functions

• extract-field-value [field body]
  

  gets value from the body using field ks, converting uuid's from string to UUID if needed
  
  - field ^ks : field to be extracted from a map
  - body ^map : map where the field will be extracted
  - returns ? : any value from the map
  

    (extract-field-value :name {:name "Rosa"})
    ;=> "Rosa"

    (extract-field-value :id {:id "53bd29d3-9b41-4550-83cc-f970d49da04d"}) 
    ;=> #uuid "53bd29d3-9b41-4550-83cc-f970d49da04d"

• is-uuid [id]
  

  if id param is a string, checks if it matches uuid regex, otherwise returns false
  
  - id ^string : string to be checked against [uuid pattern](#uuid-pattern)
  - returns ^boolean : if is a string and an uuid or not
  

    (is-uuid "53bd29d3-9b41-4550-83cc-f970d49da04d") ;=> true

• mop-fields [body fields]
  

  Clean the body removing values not present in fields param
  
  - body ^map : map to be cleaned
  - fields [^string]: string collection with the name of the allowed fields in the map
  - opts [^opts-def?](#mop-fields-opts-def): optional options - **returns** *^map* : cleaned map
  

    (mop-fields {:name "Rosa" :age 41} ["name"]) 
    ;=> {:name "Rosa"} 

• uuid
  

  returns a new random UUID
  
  - returns ^uuid : a random uuid
  

    (uuid) ;=> #uuid "53bd29d3-9b41-4550-83cc-f970d49da04d"

• uuid-as-string [uuid]
  

  converts uuid into a string
  
  - uuid ^uuid : uuid to be converted to string
  - returns ^string : uuid as a string
  

    (uuid-as-string (uuid)) ;=> "53bd29d3-9b41-4550-83cc-f970d49da04d"

• validate-and-mop!! [body mandatory accepted & field-message = "Field %s is not present"]
  

  Validates and clean body by executing [validate-mandatory](#validate-mandatory) and `mop-fields`
  
  - body ^uuid : uuid to be converted to string
  - mandatory [^string] | [^validation-def](#validation-def) : either coll of strings or map following [^validation-def](#validation-def) specs. For coll of strings, mandatory validation is triggered by default, other validations require the map
  - accepted [^string] : collection of strings having accepted keys on body, the others will be removed
  - field-message ^string? : optional argument to customize message, used only when mandatory argument is coll of strings
  - returns ^map : filtered and validated body
  - throws ^ExceptionInfo : exception info with data having bad format type and validation-messages for each field
  

   (validate-and-mop!! {:name "Rosa" :extra 6} ["name"] ["name"])
   ;=> {:name "Rosa"}

   (validate-and-mop!! {:name "Rosa"} ["age"] ["name" "age"])
   ;=> ExceptionInfo thrown => ExceptionInfo{data {:type :bad-format
   ;                                               :validation-messages [{:field "age"
   ;                                                                      :message "Field :age is not present"}]}}

   (validate-and-mop!! 
        {:name "Rosa" :age 17}
        {"age" [{:validate/type :validate/min, :validate/value 18}]}
        ["name" "age"])
   ;=> ExceptionInfo thrown => ExceptionInfo{data {:type :bad-format
   ;                                               :validation-messages [{:field "age"
   ;                                                                      :message "Field age must have a minimum size of 18"}]}}