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validate.go
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validate.go
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package json_configs
import (
"fmt"
"reflect"
"strings"
)
// Check data object (st) fields for any conflicting result map values
func validateParameters(st reflect.Type, parsedMap ParsedMap, errList *[]string) {
var filenames []string
var elementId, key, filename, tagName, paramName, paramValue string
var parsedArr []Parsed
var paramValuesMap map[string][]string
var v interface{}
var i int
var ok bool
// Maps for json tag names <-> param names, and valid param names
tag2param := make(map[string]string)
param2tag := make(map[string]string)
validparam := make(map[string]bool)
for i = 0; i < st.NumField(); i++ {
param := st.Field(i)
tagName, ok = param.Tag.Lookup("json")
if ok {
tag2param[tagName] = param.Name
param2tag[param.Name] = tagName
}
validparam[param.Name] = true
}
// Validate parameters for each element
for elementId, parsedArr = range parsedMap {
// make list of values for each parameter, with filenames found in
elementParamValuesMap := make(map[string]map[string][]string)
// make map of parameter names, with filenames found in, to see what isn't used
unusedParamMap := make(map[string][]string)
// check across all files parsed
for _, parsed := range parsedArr {
if parsed.Position == 0 {
filename = parsed.DistinctName
} else {
filename = fmt.Sprintf("%s:elem#%d", parsed.DistinctName, parsed.Position)
}
// load elementParamValuesMap to identify possible conflicting values
for i = 0; i < st.NumField(); i++ {
param := st.Field(i)
// lookup in config dataMap by tag name first, then by param name
tagName, ok = param2tag[param.Name]
if ok {
v, ok = parsed.ElementMap[tagName]
}
if !ok {
v, ok = parsed.ElementMap[param.Name]
}
if ok {
paramValue = fmt.Sprintf("%v", v)
// make list all filenames for each parameter value
paramValuesMap, ok = elementParamValuesMap[param.Name]
if !ok {
paramValuesMap = make(map[string][]string)
filenames = []string{filename}
} else {
filenames, ok = paramValuesMap[paramValue]
if ok {
filenames = append(filenames, filename)
} else {
filenames = []string{filename}
}
}
paramValuesMap[paramValue] = filenames
elementParamValuesMap[param.Name] = paramValuesMap
}
}
// load unusedParamMap to identify possible unused parameters
for key, _ = range parsed.ElementMap {
// lookup element key by tag name first
paramName, ok = tag2param[key]
if !ok {
paramName = key
}
if !validparam[paramName] {
filenames, ok = unusedParamMap[paramName]
if ok {
filenames = append(filenames, filename)
} else {
filenames = []string{filename}
}
unusedParamMap[paramName] = filenames
}
}
}
// List errors for conflicting values
for paramName, paramValuesMap = range elementParamValuesMap {
// if there are more than one value, it means settings conflict
if len(paramValuesMap) > 1 {
var conflicts []string
for paramValue, filenames = range paramValuesMap {
conflicts = append(conflicts, fmt.Sprintf("%q [%s]",
paramValue, strings.Join(filenames, ",")))
}
*errList = append(*errList, fmt.Sprintf("settings for %s conflict, parameter %s: %s",
elementId, paramName, strings.Join(conflicts, " != ")))
}
}
// List errors for unused parameters
for paramName, filenames = range unusedParamMap {
if len(filenames) == 1 {
*errList = append(*errList, fmt.Sprintf("unused setting for %s, parameter %s [%s]",
elementId, paramName, filenames[0]))
} else {
*errList = append(*errList, fmt.Sprintf("unused settings for %s, parameter %s: %d occurences [%s]",
elementId, paramName, len(filenames), strings.Join(filenames, ",")))
}
}
}
return
}