maps.go

Utils for working with maps

 
/*
Copyright © 2019, 2020, 2021, 2022 Red Hat, Inc.

Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at

    http://www.apache.org/licenses/LICENSE-2.0

Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
*/



package
 
utils

Generated documentation is available at: https://godoc.org/github.com/RedHatInsights/insights-operator-controller/utils

Documentation in literate-programming-style is available at: https://redhatinsights.github.io/insights-operator-controller/packages/utils/maps.html

 


import
 
"net/url"



import
 
"strings"

mergeMapsT merges multiple maps of various types, trying to convert them srcs can be; map[string]interface{} (for example body dedoded from json) map[string][]string (for example r.URL.Query() or r.Form (as url.Values))

 
func
 
mergeMapsT
(
srcs
 
...
interface
{
}
)
 
map
[
string
]
interface
{
}
 
{

	
input
 
:=
 
make
(
map
[
string
]
interface
{
}
)

	
for
 
_
,
 
srcm
 
:=
 
range
 
srcs
 
{

		
var
 
toMerge
 
map
[
string
]
interface
{
}


		
switch
 
v
 
:=
 
srcm
.
(
type
)
 
{

		
case
 
map
[
string
]
interface
{
}
:

			
toMerge
 
=
 
v


		
case
 
map
[
string
]
[
]
string
:

			
toMerge
 
=
 
interMap
(
v
)


		
case
 
url
.
Values
:

			
toMerge
 
=
 
interMap
(
map
[
string
]
[
]
string
(
v
)
)


		
default
:

			
panic
(
"unknown type"
)

		
}


		
input
 
=
 
MergeMaps
(
input
,
 
toMerge
)

	
}

	
return
 
input


}

stringsMap converts map[string]interface{} to flat map[string][]string Main use case is convert already flat map[string][]string or map[string]string

 
func
 
stringsMap
(
m
 
map
[
string
]
interface
{
}
)
 
map
[
string
]
[
]
string
 
{

	
sm
 
:=
 
make
(
map
[
string
]
[
]
string
)

add more types if needed

 
	
for
 
k
,
 
v
 
:=
 
range
 
m
 
{

		
if
 
s
,
 
ok
 
:=
 
v
.
(
string
)
;
 
ok
 
{

			
sm
[
k
]
 
=
 
[
]
string
{
s
}

		
}

		
if
 
s
,
 
ok
 
:=
 
v
.
(
[
]
string
)
;
 
ok
 
{

			
sm
[
k
]
 
=
 
s

		
}

		
if
 
s
,
 
ok
 
:=
 
v
.
(
map
[
string
]
interface
{
}
)
;
 
ok
 
{

			
fm
 
:=
 
stringsMap
(
s
)

			
for
 
kk
,
 
vv
 
:=
 
range
 
fm
 
{

				
sm
[
kk
]
 
=
 
vv

			
}

		
}

	
}

	
return
 
sm


}

LowerCaseKeys returns new map with keys changed to lowercase

 
func
 
LowerCaseKeys
(
m
 
map
[
string
]
interface
{
}
)
 
map
[
string
]
interface
{
}
 
{

	
nm
 
:=
 
map
[
string
]
interface
{
}
{
}


	
for
 
k
,
 
v
 
:=
 
range
 
m
 
{

		
nm
[
strings
.
ToLower
(
k
)
]
 
=
 
v

	
}

	
return
 
nm


}

interMap converts map from [string][]string to [string]interface{} taking last value from many in []string if more exists

 
func
 
interMap
(
m
 
map
[
string
]
[
]
string
)
 
map
[
string
]
interface
{
}
 
{

	
r
 
:=
 
make
(
map
[
string
]
interface
{
}
)

	
for
 
k
,
 
v
 
:=
 
range
 
m
 
{

use last provided value

 
		
if
 
len
(
v
)
 
>
 
0
 
{

			
r
[
k
]
 
=
 
v
[
len
(
v
)
-
1
]

		
}

	
}

	
return
 
r


}

MergeMaps Merges provided maps into one

 
func
 
MergeMaps
(
maps
 
...
map
[
string
]
interface
{
}
)
 
map
[
string
]
interface
{
}
 
{

	
r
 
:=
 
make
(
map
[
string
]
interface
{
}
)


	
for
 
_
,
 
m
 
:=
 
range
 
maps
 
{

		
for
 
k
,
 
v
 
:=
 
range
 
m
 
{

			
r
[
k
]
 
=
 
v

		
}

	
}

	
return
 
r


}