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/************************************************
* README *
* In order for search/index to be accessible *
* you must link this folder (search) into your *
* GOPATH *
************************************************/
package main
import "search/index"
import "os"
import "fmt"
import "sort"
import "flag"
import "strings"
type res struct {
doc string;
score float64;
};
func main() {
var init_index, sIndex index.I_index;
var tmp, results, root *index.I_entry;
var tmp_score float64;
var scores map[string]map[string]float64; // scores[doc][word] == score
var i,j int;
var searchBool, perWord, docAdded map[string]bool; //map[doc]bool
var resultSort []res;
var err error;
var fname, s string;
var search []string;
flag.StringVar(&fname, "f", "./index.dat", "Index file");
flag.StringVar(&s, "s", "" , "Search phrase");
flag.Parse();
if len(s) == 0 {
fmt.Printf("Usage: search -s \"search phrase\" [-f index_file]");
os.Exit(1);
} else {
search = strings.Fields(s);
}
scores = make(map[string]map[string]float64);
searchBool = make(map[string]bool);
perWord = make(map[string]bool);
docAdded = make(map[string]bool);
sIndex = make(index.I_index);
init_index, err = index.NewInvertedIndexFromFile(fname);
if err != nil {
panic(err)
}
for i = 0; i < len(search); i++ {
sIndex[search[i]] = init_index[search[i]]
}
for _, v := range sIndex {
for tmp = v; tmp != nil; tmp = tmp.Next {
searchBool[tmp.This.Doc] = true;
scores[tmp.This.Doc] = make(map[string]float64);
}
}
for _, v := range sIndex {
for tmp = v; tmp != nil; tmp = tmp.Next {
perWord[tmp.This.Doc] = true;
}
for d := range searchBool {
if !perWord[d] {
searchBool[d] = false;
}
}
perWord = make(map[string]bool);
}
for k, v := range sIndex {
for tmp = v; tmp != nil; tmp = tmp.Next {
if searchBool[tmp.This.Doc] {
if tmp.This.In_title {
tmp_score = 1.0;
} else {
tmp_score = 0.0;
}
scores[tmp.This.Doc][k] = (0.9 * tmp.This.Freq) + (0.1 * tmp_score);
}
}
}
i = 0;
results = &index.I_entry{nil, nil}
root = &index.I_entry{nil, nil};
results.Next = root;
j = 0;
for _ ,v := range sIndex {
for tmp = v; tmp != nil; tmp = tmp.Next {
if (searchBool[tmp.This.Doc]) {
root.This = tmp.This;
docAdded[root.This.Doc] = false;
root.Next = &index.I_entry{nil, nil};
root = root.Next;
j++
}
}
}
resultSort = make([]res, j);
i = 0;
for root = results.Next; root.Next != nil; root = root.Next {
if (!docAdded[root.This.Doc]) {
j = 0;
tmp_score = 0;
for _ ,v := range scores[root.This.Doc] {
tmp_score += v;
j++;
}
tmp_score /= float64(j);
resultSort[i] = res{root.This.Doc, tmp_score};
docAdded[root.This.Doc] = true;
i++;
}
}
resultSort = resultSort[:i];
sort.Slice(resultSort, func(i, j int) bool {
return resultSort[i].score > resultSort[j].score;
});
fmt.Printf("Results: %d\n", len(resultSort));
for i = 0; i < len(resultSort); i++ {
fmt.Printf("\t%d. Doc: %s, Score: %.3f\n", i, resultSort[i].doc, resultSort[i].score);
}
}
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