glaciers-in-archives/snowman

package config

import (
    "io/ioutil"
    "net/url"
    "os"

    "github.com/glaciers-in-archives/snowman/internal/utils"
    "gopkg.in/yaml.v2"
)

var CurrentSiteConfig SiteConfig

type ClientConfig struct {
    Endpoint string            `yaml:"endpoint"`
    Headers  map[string]string `yaml:"http_headers"`
}

type SiteConfig struct {
    Client   ClientConfig `yaml:"sparql_client"`
    Metadata map[string]interface{}
}

func (c *SiteConfig) Parse(data []byte) error {
    if err := yaml.Unmarshal(data, c); err != nil {
        return err
    }

    _, err := url.ParseRequestURI(c.Client.Endpoint) // #TODO why is https://example valid?
    if err != nil {
        return err
    }
    return nil
}

func LoadConfig(fileLocation string) error {
    if _, err := os.Stat(fileLocation); err != nil {
        if fileLocation == "snowman.yaml" {
            return utils.ErrorExit("Unable to locate snowman.yaml in the current working directory.", err)
        } else {
            return utils.ErrorExit("Unable to locate Snowman configuration file at "+fileLocation+".", err)
        }
    }

    data, err := ioutil.ReadFile(fileLocation)
    if err != nil {
        return utils.ErrorExit("Failed to read "+fileLocation+".", err)
    }

    if err := CurrentSiteConfig.Parse(data); err != nil {
        return utils.ErrorExit("Failed to parse "+fileLocation+".", err)
    }

    return nil
}