From b80bd744ad873f6fc43018bc4bfb90677de167bd Mon Sep 17 00:00:00 2001
From: Stefan Wintermeyer <stefan.wintermeyer@amooma.de>
Date: Mon, 17 Dec 2012 12:01:45 +0100
Subject: Start of GS5.

---
 misc/freeswitch/scripts/common/str.lua | 136 +++++++++++++++++++++++++++++++++
 1 file changed, 136 insertions(+)
 create mode 100644 misc/freeswitch/scripts/common/str.lua

(limited to 'misc/freeswitch/scripts/common/str.lua')

diff --git a/misc/freeswitch/scripts/common/str.lua b/misc/freeswitch/scripts/common/str.lua
new file mode 100644
index 0000000..b19f299
--- /dev/null
+++ b/misc/freeswitch/scripts/common/str.lua
@@ -0,0 +1,136 @@
+-- Gemeinschaft 5 module: string functions
+-- (c) AMOOMA GmbH 2012
+-- 
+
+module(...,package.seeall)
+
+function try(array, arguments)
+  local argument = arguments:match('^(.-)%.') or arguments;
+  local remaining_arguments = arguments:match('%.(.-)$');
+  
+  if argument and type(array) == 'table' then
+    if remaining_arguments then
+      if type(array[argument]) == 'table' then
+        return try(array[argument], remaining_arguments);
+      else
+        return nil;
+      end
+    else
+      return array[argument];
+    end
+  end
+
+  return nil;
+end
+
+-- to number
+function to_n(value)
+  value = tostring(value):gsub('[^%d%.%+%-]', '');
+  return tonumber(value) or 0;
+end
+
+-- to integer
+function to_i(value)
+  return math.floor(to_n(value)); 
+end
+
+-- to string
+function to_s(value)
+  if value == nil then
+    return '';
+  end
+
+  return tostring(value);
+end
+
+-- to boolean
+function to_b(value)
+  if type(value) == 'boolean' then
+    return value;
+  elseif tonumber(value) then
+    return (tonumber(value) > 0);
+  else
+    return (tostring(value) == 'yes' or tostring(value) == 'true');
+  end
+end
+
+-- to array
+function to_a(line, separator)
+  line = line or '';
+  separator = separator or ';';
+  local result = {}
+  line:gsub('([^' .. separator .. ']+)', function(entry)
+    table.insert(result, entry);
+  end);
+
+  return result;
+end
+
+-- stripped to array
+function strip_to_a(line, separator)
+
+  local result = {}
+  line:gsub('([^' .. separator .. ']+)', function(entry)
+    table.insert(result, (entry:gsub('^%s+', ''):gsub('%s+$', '')));
+  end);
+
+  return result;
+end
+
+-- downcase
+function downcase(value)
+  if value == nil then
+    return '';
+  end
+
+  return tostring(value):lower();
+end
+
+-- remove special characters
+function to_ascii(value)
+  return (to_s(value):gsub('[^A-Za-z0-9%-%_ %(%)]', ''));
+end
+
+-- to SQL
+function to_sql(value)
+  if type(value) == 'boolean' then
+    return tostring(value):upper();
+  elseif type(value) == 'number' then
+    return tostring(value);
+  elseif type(value) == 'string' then
+    return '"' .. value:gsub('"', '\\"'):gsub("'", "\\'") .. '"';
+  else
+    return 'NULL';
+  end
+end
+
+-- to JSON
+function to_json(value)
+  if type(value) == 'boolean' then
+    return tostring(value):lower();
+  elseif type(value) == 'number' then
+    return tostring(value);
+  elseif type(value) == 'string' then
+    return '"' .. value:gsub('"', '\\"'):gsub("'", "\\'") .. '"';
+  else
+    return 'null';
+  end
+end
+
+-- remove leading/trailing whitespace
+function strip(value)
+  return (tostring(value):gsub('^%s+', ''):gsub('%s+$', ''));
+end
+
+-- split string
+function partition(value, separator)
+  value = tostring(value);
+  separator = separator or ':'
+
+  return value:match('^(.-)' ..  separator), value:match(separator .. '(.-)$');
+end
+
+-- check if value is empty string or nil
+function blank(value)
+  return (value == nil or to_s(value) == '');
+end
-- 
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