CPP-Search-engine/cmdhandler.cpp at main · ctutor99/CPP-Search-engine · GitHub

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
#include "cmdhandler.h"
#include "handler.h"
#include "util.h"
using namespace std;

// Complete
QuitHandler::QuitHandler()
{

}

// Complete
QuitHandler::QuitHandler(Handler* next)
    : Handler(next)
{

}

// Complete
bool QuitHandler::canHandle(const std::string& cmd) const
{
    return cmd == "QUIT";

}

// Complete
Handler::HANDLER_STATUS_T QuitHandler::process(SearchEng* eng, std::istream& instr, std::ostream& ostr)
{
    return HANDLER_QUIT;
}

// Complete
PrintHandler::PrintHandler()
{

}

// Complete
PrintHandler::PrintHandler(Handler* next)
    : Handler(next)
{

}

// Complete
bool PrintHandler::canHandle(const std::string& cmd) const
{
    return cmd == "PRINT";

}

// Complete
Handler::HANDLER_STATUS_T PrintHandler::process(SearchEng* eng, std::istream& instr, std::ostream& ostr)
{
    string name;

    if (!(instr >> name)) {
        return HANDLER_ERROR;
    }
    try {
        eng->display_page(ostr, name);
    }
    catch (std::exception& e) {
        return HANDLER_ERROR;
    }
    return HANDLER_OK;
}

// Add code for other handler class implementations below

AndHandler::AndHandler() {}
AndHandler::AndHandler(Handler* next) : Handler(next) {}

bool AndHandler::canHandle(const std::string& cmd) const {
    return cmd == "AND";
}

Handler::HANDLER_STATUS_T AndHandler::process(SearchEng* eng, std::istream& instr, std::ostream& ostr) {
    std::vector<std::string> terms;
    std::string w;
    while (instr >> w) terms.push_back(w);

    AndWebPageSetCombiner comb;
    WebPageSet results = eng->search(terms, &comb);

    display_hits(results, ostr);
    return HANDLER_OK;
}

// OR Handler implementations
OrHandler::OrHandler() {}
OrHandler::OrHandler(Handler* next) : Handler(next) {}

bool OrHandler::canHandle(const std::string& cmd) const {
    return cmd == "OR";
}

Handler::HANDLER_STATUS_T OrHandler::process(SearchEng* eng, std::istream& instr, std::ostream& ostr) {
    std::vector<std::string> terms;
    std::string w;
    while (instr >> w) terms.push_back(w);

    OrWebPageSetCombiner comb;
    WebPageSet results = eng->search(terms, &comb);

    display_hits(results, ostr);
    return HANDLER_OK;
}

// DIFF Handler implementations
DiffHandler::DiffHandler() {}
DiffHandler::DiffHandler(Handler* next) : Handler(next) {}

bool DiffHandler::canHandle(const std::string& cmd) const {
    return cmd == "DIFF";
}

Handler::HANDLER_STATUS_T DiffHandler::process(SearchEng* eng, std::istream& instr, std::ostream& ostr) {
    std::vector<std::string> terms;
    std::string w;
    while (instr >> w) terms.push_back(w);

    DiffWebPageSetCombiner comb;
    WebPageSet results = eng->search(terms, &comb);

    display_hits(results, ostr);
    return HANDLER_OK;
}

// INCOMING Handler implementations
IncomingHandler::IncomingHandler() {}
IncomingHandler::IncomingHandler(Handler* next) : Handler(next) {}

bool IncomingHandler::canHandle(const std::string& cmd) const {
    return cmd == "INCOMING";
}

Handler::HANDLER_STATUS_T IncomingHandler::process(SearchEng* eng, std::istream& instr, std::ostream& ostr) {
    std::string page;
    if (!(instr >> page)) return HANDLER_ERROR;

    WebPage* wp = eng->retrieve_page(page);
    if (!wp) return HANDLER_ERROR;

    const WebPageSet &in = wp->incoming_links();
    ostr << in.size() << std::endl;
    for (WebPage* p : in) {
        ostr << p->filename() << std::endl;
    }
    return HANDLER_OK;
}

// OUTGOING Handler implementations
OutgoingHandler::OutgoingHandler() {}
OutgoingHandler::OutgoingHandler(Handler* next) : Handler(next) {}

bool OutgoingHandler::canHandle(const std::string& cmd) const {
    return cmd == "OUTGOING";
}

Handler::HANDLER_STATUS_T OutgoingHandler::process(SearchEng* eng, std::istream& instr, std::ostream& ostr) {
    std::string page;
    if (!(instr >> page)) return HANDLER_ERROR;

    WebPage* wp = eng->retrieve_page(page);
    if (!wp) return HANDLER_ERROR;

    const WebPageSet &out = wp->outgoing_links();
    ostr << out.size() << std::endl;
    for (WebPage* p : out) {
        ostr << p->filename() << std::endl;
    }
    return HANDLER_OK;
}