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Merge pull request #4 from majk-p/master
Extract private utils, minor refactor, format readme
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,108 @@ | ||
| package glassnode | ||
|
|
||
| import ( | ||
| "fmt" | ||
| "net/url" | ||
| "path" | ||
| ) | ||
|
|
||
| func constructURL(api Client, options *APIOptionsList) (string, error) { | ||
|
|
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| // -------- | ||
| // Base URL | ||
| // -------- | ||
|
|
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| baseURL, err := url.Parse(api.BaseURL) | ||
| if err != nil { | ||
| return "", fmt.Errorf("[GetMetricData] couldn't parse url: %s", err.Error()) | ||
| } | ||
| baseURL.Path = path.Join(baseURL.Path, MetricsPrefix) | ||
|
|
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| // ------------- | ||
| // Data Category | ||
| // ------------- | ||
|
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| if options.Category == "" { | ||
| return "", fmt.Errorf("APIOptionsList.Category appears to be empty but is required") | ||
| } | ||
| baseURL.Path = path.Join(baseURL.Path, options.Category) | ||
|
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| // --------------- | ||
| // Specific metric | ||
| // --------------- | ||
|
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| if options.Metric == "" { | ||
| return "", fmt.Errorf("APIOptionsList.Metric appears to be empty but is required") | ||
| } | ||
| baseURL.Path = path.Join(baseURL.Path, options.Metric) | ||
|
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| finalParams, err := makeParams(api.apiKey, options) | ||
| if err != nil { | ||
| return "", fmt.Errorf("[GetMetricData] couldn't prepare parameters: %s", err.Error()) | ||
| } | ||
| baseURL.RawQuery = finalParams.Encode() | ||
|
|
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| return baseURL.String(), nil | ||
| } | ||
|
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| func makeParams(apiKey string, options *APIOptionsList) (*url.Values, error) { | ||
| // --------------- | ||
| // Parsing helpers | ||
| // --------------- | ||
|
|
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| unrefinedParams := make(map[string]string) | ||
| finalParams := url.Values{} | ||
|
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| // | ||
| // apply raw params, if any | ||
| // | ||
|
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| for key, value := range options.DirectMapping { | ||
| unrefinedParams[key] = value | ||
| } | ||
|
|
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| // | ||
| // required params | ||
| // | ||
|
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| if apiKey == "" { | ||
| return nil, fmt.Errorf("api key appears to be empty but is required") | ||
| } | ||
| unrefinedParams["api_key"] = apiKey | ||
|
|
||
| if options.Asset != "" { | ||
| unrefinedParams["a"] = options.Asset | ||
| } | ||
| if unrefinedParams["a"] == "" { | ||
| return nil, fmt.Errorf("parameter a (Asset) appears to be empty but is required") | ||
| } | ||
|
|
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| // | ||
| // optional params | ||
| // | ||
|
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| if options.Since != 0 { | ||
| unrefinedParams["s"] = fmt.Sprint(options.Since) | ||
| } | ||
| if options.Until != 0 { | ||
| unrefinedParams["u"] = fmt.Sprint(options.Until) | ||
| } | ||
| if options.Frequency != "" { | ||
| unrefinedParams["i"] = fmt.Sprint(options.Frequency) | ||
| } | ||
|
|
||
| // | ||
| // Unsupported options: | ||
| if unrefinedParams["f"] != "" { | ||
| return nil, fmt.Errorf("parameter f (Format) shouldn't be specified") | ||
| } | ||
|
|
||
| // ----------------------- | ||
| // Construct the final URL | ||
| // ----------------------- | ||
|
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| for key, value := range unrefinedParams { | ||
| finalParams.Add(key, value) | ||
| } | ||
| return &finalParams, nil | ||
| } |