EE312-Assignment5/UtPod.cpp at master · ajacob747/EE312-Assignment5 · GitHub

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//
// Created by Andrew on 10/24/2018.
//

#include "UtPod.h"
#include "Song.h"
#include <iostream>
#include <cstdlib>

    UtPod::UtPod() {
        memSize = MAX_MEMORY;
        songs = NULL;
    }

    UtPod::UtPod(int size) {
        if(size>MAX_MEMORY || size<=0)
            memSize = MAX_MEMORY;
        else
            memSize = size;
        songs = NULL;
    }
    int UtPod::addSong(Song const &s) {
      if (s.getSize()>getRemainingMemory())
            return NO_MEMORY;
        SongNode *newSong = new SongNode;
        newSong->s = s;
        newSong->next = NULL;
        SongNode *tracker = songs;

        if(tracker == NULL)
            songs = newSong;
        else {
            while (tracker->next != NULL)
                tracker = tracker->next;
            tracker->next = newSong;
        }
        return SUCCESS;
    }

    int UtPod::removeSong(Song const &s) {
        SongNode *tracker = songs;
        SongNode *trail = NULL;

        if(tracker != NULL && tracker->s == s){
            songs = tracker->next;
            delete(tracker);
            return SUCCESS;
        }
        bool found = false;

        while(found==false && tracker!=NULL){
            trail = tracker;
            tracker = tracker->next;
            if(tracker!=NULL && tracker->s == s){
                found = true;
            }
        }
        if(tracker == NULL)
            return NOT_FOUND;
        trail->next = tracker->next;
        delete(tracker);
        return SUCCESS;
    }

    void UtPod::shuffle() {
        if(songs == NULL)
            return;
        int songNumber = getNumSongs();
        for(int i = 0; i<songNumber*2; i++){
            SongNode *track1 = songs;
            SongNode *track2 = songs;
            int swap1 = rand()%songNumber;
            int swap2 = rand()%songNumber;
            if (swap1!=swap2){
                for(int j = 0; j<swap1; j++)
                    track1 = track1->next;
                for(int j = 0; j<swap2; j++)
                    track2 = track2->next;
                swap(track1,track2);
            }

        }
    }
    void UtPod::showSongList() {
        SongNode *tracker = songs;
        while(tracker!=NULL){
            cout<<tracker->s.getTitle()+", "+ tracker->s.getArtist()+", " << tracker->s.getSize()<<endl;
            tracker = tracker->next;
        }
    }

    void UtPod::sortSongList() {
        if (songs == NULL || songs->next == NULL)
            return;
        SongNode *i = songs;
        SongNode *j;
        SongNode *min;

        while(i->next!=NULL){
            min = i;
            j=i->next;
            while(j!=NULL){
                if(j->s < min->s)
                    min = j;
                j = j->next;
            }
            if(i!=min){
                swap(i,min);
            }
            i=i->next;
        }
    }

    int UtPod::getRemainingMemory() {
        SongNode *tracker = songs;
        int size = 0;
        while(tracker!=NULL){
            size+=tracker->s.getSize();
            tracker = tracker->next;
        }
        return memSize-size;
    }

    void UtPod::clearMemory() {
        if(songs == NULL)
            return;
        SongNode *tracker = songs->next;
        SongNode *trail = songs;
        if(tracker== NULL && songs!=NULL) {
            delete trail;
            songs = NULL;
            return;
        }
        trail = tracker;
        tracker = tracker->next;
        while(trail!=NULL){
            delete(trail);
            trail = tracker;
            if(trail!=NULL)
                tracker = tracker->next;
        }
        tracker = songs;
        delete tracker;
        songs = NULL;
    }

    int UtPod::getNumSongs() {
        SongNode *tracker = songs;
        if (songs == NULL)
            return 0;
        int songNumber = 0;
        while (tracker != NULL) {
            songNumber++;
            tracker = tracker->next;
        }
        return songNumber;
    }

    void UtPod::swap(UtPod::SongNode *a, UtPod::SongNode *b) {
        Song *temp = new Song;
        *temp = a->s;
        a->s = b->s;
        b->s = *temp;
        delete(temp);
    }

    UtPod::~UtPod() {
        clearMemory();
    }