From 22e73b4c4714c187a348e689f25197c8dffcbd16 Mon Sep 17 00:00:00 2001
From: Alec Perkins <alecperkins@gmail.com>
Date: Thu, 5 Sep 2013 14:08:41 -0400
Subject: [PATCH] 1.0.0

---
 .gitignore           |  1 +
 README.md            | 85 +++++++++++++++++++++++++++++++++++++++++++-
 package.json         | 31 ++++++++++++++++
 source/params.coffee | 68 +++++++++++++++++++++++++++++++++++
 test/test.coffee     | 69 +++++++++++++++++++++++++++++++++++
 5 files changed, 253 insertions(+), 1 deletion(-)
 create mode 100644 package.json
 create mode 100644 source/params.coffee
 create mode 100644 test/test.coffee

diff --git a/.gitignore b/.gitignore
index f356293..4d063b5 100644
--- a/.gitignore
+++ b/.gitignore
@@ -12,3 +12,4 @@ logs
 results
 
 npm-debug.log
+node_modules
\ No newline at end of file
diff --git a/README.md b/README.md
index 66a4a19..359f87b 100644
--- a/README.md
+++ b/README.md
@@ -1,2 +1,85 @@
-params
+Params
 ======
+
+A simple front-end parameters manager for specifying global script parameters.
+
+## Usage
+
+Include `params.js` in the page and initialize a parameters object.
+
+```javascript
+params = new Params()
+```
+
+*   Set a parameter:
+
+    ```javascript
+    > params.set('eggs', 'green')
+    ```
+
+    ```javascript
+    > params.set('enabled', true).set('inactive', false).set('name', 'Basil')
+    ```
+    
+
+*   Get a parameter:
+
+    ```javascript
+    > params.eggs
+    'green'
+    ```
+
+*   Override a parameter:
+
+    ```javascript
+    > params.set('eggs', 'blue')
+    ! Param 'eggs' overridden (`green` with `blue`)
+    > params.eggs
+    'blue'
+    ```
+
+*   Set nested parameters:
+
+    ```javascript
+    > params.set('urls.static', '/static/')
+    > params.set('urls.media', '/media/')
+    > params.urls
+    { static: '/static/', media: '/media/' }
+    > params.urls.static
+    '/static/'
+    > params.set('a.b.c', true)
+    > params.a.b.c
+    true
+    ```
+
+*   Get all parameters:
+
+    ```javascript
+    > params.getAll()
+    {
+        eggs: 'blue',
+        enabled: true,
+        inactive: false,
+        name: 'Basil',
+        urls: {
+            static: '/static/',
+            media: '/media/'
+        },
+        a: {
+            b: {
+                c: true
+            }
+        }
+    }
+    ```
+
+*   Prevent parameter overriding:
+
+    ```javascript
+    > strict_params = new Params({ strict: true })
+    > strict_params.set('only_set_once', true)
+    > strict_params.set('only_set_once', 'fails')
+    Error: Param 'only_set_once' was already set with `true`
+    > strict_params.only_set_once
+    true
+
diff --git a/package.json b/package.json
new file mode 100644
index 0000000..96a22a8
--- /dev/null
+++ b/package.json
@@ -0,0 +1,31 @@
+{
+    "name": "params",
+    "version": "1.0.0",
+    "description": "",
+    "dependencies": {
+    },
+    "devDependencies": {
+        "coffee-script": "1.x.x",
+        "mocha": "*",
+        "should": "*",
+        "uglify-js": "2.x.x"
+    },
+    "scripts": {
+        "test": "node_modules/.bin/mocha --compilers coffee:coffee-script"
+    },
+    "repository": {
+        "type": "git",
+        "url": "git://github.com/droptype/params.git"
+    },
+    "author": "Alec Perkins <alec@droptype.com>",
+    "license": {
+        "type": "Unlicense",
+        "url": "https://raw.github.com/droptype/params/master/LICENSE"
+    },
+    "contributors": [
+        {
+            "name": "Alec Perkins",
+            "email": "alec@droptype.com"
+        }
+    ]
+}
\ No newline at end of file
diff --git a/source/params.coffee b/source/params.coffee
new file mode 100644
index 0000000..1313d3b
--- /dev/null
+++ b/source/params.coffee
@@ -0,0 +1,68 @@
+###
+Parameters manager - https://github.com/droptype/params
+###
+
+INTERNAL = ['set', 'getAll', '_strict']
+
+class Params
+
+    @VERSION = '1.0.0'
+
+    constructor: (opts={}) ->
+        @_strict = if opts.strict? then opts.strict else false
+
+
+    # Public: set a parameter.
+    #
+    # key   - a String key to set. MAY use dot notation to specify sub parameters.
+    # value - an arbitrary value to set
+    #
+    # Returns self for chaining.
+    set: (key, value) =>
+        if key in INTERNAL
+            throw new Error("Cannot set the '#{ key }' param, silly.")
+
+        key_list = key.split('.')
+        target_obj = this
+        prev_key = null
+
+        # Loop over the key list, constructing nested objects as necessary for
+        # subparameters.
+        while key_list.length > 0
+            key = key_list.shift()
+
+            if typeof target_obj isnt 'object'
+                throw new Error("Cannot set subparameter '#{ prev_key }.#{ key }'. '#{ prev_key }' is not an object.")
+
+            if key_list.length is 0
+                if target_obj[key]?
+                    if @_strict
+                        throw new Error("Param '#{ key }' was already set with `#{ target_obj[key] }`")
+                    console?.warn?("Param '#{ key }' overridden (`#{ target_obj[key] }` with `#{ value }`)")
+                target_obj[key] = value
+
+            else
+                if not target_obj[key]?
+                    target_obj[key] = {}
+                target_obj = target_obj[key]
+            prev_key = key
+
+        return this
+
+    # Public: get all of the parameters. Used to avoid getting the internal
+    # properties as well.
+    #
+    # Returns an object of all the parameters.
+    getAll: ->
+        param_obj = {}
+        for k, v of this
+            unless k in INTERNAL
+                param_obj[k] = v
+        return param_obj
+
+
+if module?
+    module.exports = Params
+else if window?
+    window.Params = Params
+
diff --git a/test/test.coffee b/test/test.coffee
new file mode 100644
index 0000000..245b31b
--- /dev/null
+++ b/test/test.coffee
@@ -0,0 +1,69 @@
+require 'should'
+
+
+
+describe 'Params', ->
+    Params = require '../source/params'
+    it 'should set a parameter', ->
+        params = new Params()
+        params.set('key', 1)
+        params.key.should.equal(1)
+
+    it 'should set a sub parameter', ->
+        params = new Params()
+        params.set('key.subkey', 1)
+        params.key.subkey.should.equal(1)
+
+    it 'should set a sub sub parameter', ->
+        params = new Params()
+        params.set('key.subkey.subsubkey', 1)
+        params.key.subkey.subsubkey.should.equal(1)
+
+    it 'should not set a sub parameter if parameter is not an object', ->
+        params = new Params()
+        params.set('key', 1)
+        (-> params.set('key.foo', 1)).should.throw("Cannot set subparameter 'key.foo'. 'key' is not an object.")
+        params.key.should.equal(1)
+
+        (-> params.set('key.foo.bar', 1)).should.throw("Cannot set subparameter 'key.foo'. 'key' is not an object.")
+        params.key.should.equal(1)
+
+    it 'should allow the key to be overridden', ->
+        params = new Params()
+        params.set('key', 1)
+        params.key.should.equal(1)
+        params.set('key', 2)
+        params.key.should.equal(2)
+
+    it 'should prevent the key from being overridden in strict mode', ->
+        params = new Params(strict: true)
+        params.set('key', 1)
+        params.key.should.equal(1)
+        (-> params.set('key', 2)).should.throw("Param 'key' was already set with `1`")
+
+    it 'should not allow internal properties to be set', ->
+        params = new Params()
+        (-> params.set('set', 1)).should.throw()
+        (-> params.set('getAll', 1)).should.throw()
+        (-> params.set('_strict', 1)).should.throw()
+
+# params = new Params()
+
+# console.log params.getAll()
+
+# params.set('foo', 'a').set('Bar', 1234)
+
+# console.log params.getAll()
+
+# params.set('foo', 9)
+
+# console.log params.getAll()
+
+
+# params.set('asdf.asdf.asdf', 9)
+
+# console.log params.getAll()
+
+# params.set('foo.bar', 9)
+# console.log params.getAll()
+# console.log params.foo
\ No newline at end of file