<commit_before>package bittorrent

import (
	"errors"
	"net/url"
	"strconv"
	"strings"

	"github.com/chihaya/chihaya/pkg/log"
)

// Params is used to fetch (optional) request parameters from an Announce.
// For HTTP Announces this includes the request path and parsed query, for UDP
// Announces this is the extracted path and parsed query from optional URLData
// as specified in BEP41.
//
// See ParseURLData for specifics on parsing and limitations.
type Params interface {
	// String returns a string parsed from a query. Every key can be
	// returned as a string because they are encoded in the URL as strings.
	String(key string) (string, bool)

	// RawPath returns the raw path from the request URL.
	// The path returned can contain URL encoded data.
	// For a request of the form "/announce?port=1234" this would return
	// "/announce".
	RawPath() string

	// RawQuery returns the raw query from the request URL, excluding the
	// delimiter '?'.
	// For a request of the form "/announce?port=1234" this would return
	// "port=1234"
	RawQuery() string
}

// ErrKeyNotFound is returned when a provided key has no value associated with
// it.
var ErrKeyNotFound = errors.New("query: value for the provided key does not exist")

// ErrInvalidInfohash is returned when parsing a query encounters an infohash
// with invalid length.
var ErrInvalidInfohash = ClientError("provided invalid infohash")

// ErrInvalidQueryEscape is returned when a query string contains invalid
// escapes.
var ErrInvalidQueryEscape = ClientError("invalid query escape")

// QueryParams parses a URL Query and implements the Params interface with some
// additional helpers.
type QueryParams struct {
	path       string
	query      string
	params     map[string]string
	infoHashes []InfoHash
}

type routeParamsKey struct{}

// RouteParamsKey is a key for the context of a request that
// contains the named parameters from the http router.
var RouteParamsKey = routeParamsKey{}

// RouteParam is a type that contains the values from the named parameters
// on the route.
type RouteParam struct {
	Key   string
	Value string
}

// RouteParams is a collection of RouteParam instances.
type RouteParams []RouteParam

// ParseURLData parses a request URL or UDP URLData as defined in BEP41.
// It expects a concatenated string of the request's path and query parts as
// defined in RFC 3986. As both the udp: and http: scheme used by BitTorrent
// include an authority part the path part must always begin with a slash.
// An example of the expected URLData would be "/announce?port=1234&uploaded=0"
// or "/?auth=<PASSWORD>".<commit_msg>add helper method to retrieve RouteParam by name<commit_after>package bittorrent

import (
	"errors"
	"net/url"
	"strconv"
	"strings"

	"github.com/chihaya/chihaya/pkg/log"
)

// Params is used to fetch (optional) request parameters from an Announce.
// For HTTP Announces this includes the request path and parsed query, for UDP
// Announces this is the extracted path and parsed query from optional URLData
// as specified in BEP41.
//
// See ParseURLData for specifics on parsing and limitations.
type Params interface {
	// String returns a string parsed from a query. Every key can be
	// returned as a string because they are encoded in the URL as strings.
	String(key string) (string, bool)

	// RawPath returns the raw path from the request URL.
	// The path returned can contain URL encoded data.
	// For a request of the form "/announce?port=1234" this would return
	// "/announce".
	RawPath() string

	// RawQuery returns the raw query from the request URL, excluding the
	// delimiter '?'.
	// For a request of the form "/announce?port=1234" this would return
	// "port=1234"
	RawQuery() string
}

// ErrKeyNotFound is returned when a provided key has no value associated with
// it.
var ErrKeyNotFound = errors.New("query: value for the provided key does not exist")

// ErrInvalidInfohash is returned when parsing a query encounters an infohash
// with invalid length.
var ErrInvalidInfohash = ClientError("provided invalid infohash")

// ErrInvalidQueryEscape is returned when a query string contains invalid
// escapes.
var ErrInvalidQueryEscape = ClientError("invalid query escape")

// QueryParams parses a URL Query and implements the Params interface with some
// additional helpers.
type QueryParams struct {
	path       string
	query      string
	params     map[string]string
	infoHashes []InfoHash
}

type routeParamsKey struct{}

// RouteParamsKey is a key for the context of a request that
// contains the named parameters from the http router.
var RouteParamsKey = routeParamsKey{}

// RouteParam is a type that contains the values from the named parameters
// on the route.
type RouteParam struct {
	Key   string
	Value string
}

// RouteParams is a collection of RouteParam instances.
type RouteParams []RouteParam

// ByName returns the value of the first RouteParam that matches the given
// name. If no matching RouteParam is found, an empty string is returned.
func (rp RouteParams) ByName(name string) string {
	for _, p := range rp {
		if p.Key == name {
			return p.Value
		}
	}
	return ""
}

// ParseURLData parses a request URL or UDP URLData as defined in BEP41.
// It expects a concatenated string of the request's path and query parts as
// defined in RFC 3986. As both the udp: and http: scheme used by BitTorrent
// include an authority part the path part must always begin with a slash.
// An example of the expected URLData would be "/announce?port=1234&uploaded=0"
// or "/?auth=0x1337".
{'fraction_non_alphanumeric': 0.0742476121823752, 'fraction_numerical': 0.009911695801045233, 'mean_word_length': 3.715378079864061, 'pattern_counts': {'":': 0, '<': 4, '<?xml version=': 0, '>': 4, 'https://': 0, 'lorem ipsum': 0, 'www.': 0, 'xml': 0}, 'pii_count': 0, 'substrings_counts': 0, 'word_list_counts': {'cursed_substrings.json': 0, 'profanity_word_list.json': 0, 'sexual_word_list.json': 0, 'zh_pornsignals.json': 0}}
{'dir': 'git-commits-cleaned', 'id': '2600241', 'n_tokens_mistral': 1569, 'n_tokens_neox': 1501, 'n_words': 736}