Add functions for a simple CLI<->HTTP layer.

Nim's `terminal` library provides ANSI terminal escape support, but
only when writing directly to a File handle. This commit adds the
`term{FG,BG}` procedures and `termReset` constant to help with embedding
ANSI escape codes in string data.

cliutils.nim

@@ -1,4 +1,4 @@
-import docopt, json, osproc, posix, nre, streams, strtabs, unicode
+import docopt, json, osproc, posix, nre, streams, strtabs, terminal, unicode
 import os except sleep
 import strutils except toUpper, toLower
 
@@ -8,6 +8,8 @@ type
     docopt*: Table[string, Value]
     json*: JsonNode
 
+  TermColor = ForegroundColor or BackgroundColor
+
 proc getVal*(cfg: CombinedConfig, key, default: string): string =
   let argKey = "--" & key
   let envKey = key.replace('-', '_').toUpper
@@ -15,7 +17,16 @@ proc getVal*(cfg: CombinedConfig, key, default: string): string =
 
   if cfg.docopt[argKey]: return $cfg.docopt[argKey]
   elif existsEnv(envKey): return getEnv(envKey)
-  elif cfg.json.hasKey(jsonKey): return cfg.json[jsonKey].getStr
+  elif cfg.json.hasKey(jsonKey):
+    let node = cfg.json[jsonKey]
+    case node.kind
+    of JString: return node.getStr
+    of JInt: return $node.getInt
+    of JFloat: return $node.getFloat
+    of JBool: return $node.getBool
+    of JNull: return ""
+    of JObject: return $node
+    of JArray: return $node
   else: return default
 
 
@@ -82,7 +93,7 @@ proc execWithOutput*(command: string, workingDir:string = "",
            args: openArray[string] = [], env: StringTableRef = nil,
            options: set[ProcessOption] = {poUsePath},
            msgCB: HandleProcMsgCB = nil):
-    tuple[output: TaintedString, error: TaintedString, exitCode: int] =
+    tuple[output, error: TaintedString, exitCode: int] =
 
   result = (TaintedString"", TaintedString"", -1)
   var outSeq, errSeq: seq[TaintedString]
@@ -162,3 +173,28 @@ proc daemonize*(pidfile, si, so, se: string, daemonMain: proc(): void): Pid =
     daemonMain()
 
   return pid1
+
+const termReset* = "\e[0;m"
+
+proc termColor*(color: TermColor, bright, bold = false): string =
+  var colorVal = ord(color)
+  if bright: inc(colorVal, 60)
+  return "\e[" & $colorVal & (if bold: ";1" else: "") & "m"
+
+proc withColor*(str: string, color: TermColor, bright, bold = false): string =
+  return termColor(color, bright, bold) & str
+
+let STRIP_ANSI_REGEX = re"\x1B\[([0-9]{1,2}(;[0-9]{1,2})?)?[m|K]"
+
+proc stripAnsi*(str: string): string = return str.replace(STRIP_ANSI_REGEX, "")
+
+proc queryParamsToCliArgs*(queryParams: StringTableRef): seq[string] =
+  result = @[]
+
+  for k,v in queryParams:
+    # support ?arg1=val1&arg2=val2 -> cmd val1 val2
+    if k.startsWith("arg"): result.add(v)
+
+    else :
+      result[1].add("--" & k)
+      if v != "true": result[1].add(v) # support things like ?verbose=true -> cmd --verbose

cliutils.nimble

@@ -1,6 +1,6 @@
 # Package
 
-version       = "0.3.4"
+version       = "0.5.0"
 author        = "Jonathan Bernard"
 description   = "Helper functions for writing command line interfaces."
 license       = "MIT"